| Patrick Olsen | 05-24-2006 12:04 PM |
Cusco RS rear LSD fluid recommendations?
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Howdy! A couple months back I had a Cusco 1.5-way LSD installed by Rallispec in the rear of my Legacy. I immediately noticed that it was wicked tight - lots of popping and clunking during slow speed maneuvers, to the point the car would actually surge (like I didn't know how to drive stick) as I pulled around a corner. Rallispec had I think used Motul fluid in it, and told me to give it a couple/few hundred miles to break it in. They also said to find an empty lot and do some tight figure-8 turns to help break it in. So, I did that, and even after 1000 miles the thing sounded/felt the same.
I drained the fluid, and replaced with Mobil1 + a tube of friction modifier for clutch type LSDs. Went and did the figure-8s again and [i]voila![/i] no more noise. Well, it wasn't completely gone, but it was probably 90% gone, and the car felt much better.
Everything was hunky dory for about 6 weeks or so, and then I did a track event at VIR. I'm not sure it's directly related to that, since the change didn't occur immediately, but about a week or so after the track event the diff started to really clunk and pop a lot again. I haven't drained the fluid yet, but my guess is that maybe I cooked it with the track sessions? I dunno.
So, I'm curious what fluid others are using with their Cusco LSDs. I'm hoping that there's an option out there, and not just "That's the way LSDs are, suck it up."
Thanks,
Pat Olsen
'97 Legacy 2.5GT sedan
I drained the fluid, and replaced with Mobil1 + a tube of friction modifier for clutch type LSDs. Went and did the figure-8s again and [i]voila![/i] no more noise. Well, it wasn't completely gone, but it was probably 90% gone, and the car felt much better.
Everything was hunky dory for about 6 weeks or so, and then I did a track event at VIR. I'm not sure it's directly related to that, since the change didn't occur immediately, but about a week or so after the track event the diff started to really clunk and pop a lot again. I haven't drained the fluid yet, but my guess is that maybe I cooked it with the track sessions? I dunno.
So, I'm curious what fluid others are using with their Cusco LSDs. I'm hoping that there's an option out there, and not just "That's the way LSDs are, suck it up."
Thanks,
Pat Olsen
'97 Legacy 2.5GT sedan
| Patrick L | 05-24-2006 01:04 PM |
This sounds similar to a binding center diff problem I had about a week ago. Only did this in turns.
| stealthx32 | 05-25-2006 11:50 AM |
My Cusco RS 1.5 way (for a Nissan 240SX) popped and clunked a decent amount on any synthetic. I switched to Valvoline 80w-140 semi-synthentic, and voila! All quiet again.
| Patrick Olsen | 05-25-2006 11:10 PM |
Well, I have all sorts of things in my garage, so I think I'm going to try some Redline Shockproof next. Their description makes it sound like it can help with stubborn LSDs, so we'll see...
Pat
Pat
| Patrick L | 05-26-2006 01:36 PM |
Pat, let us know how the shockproof works out.
I use it all the time in my car.
Pat
I use it all the time in my car.
Pat
| BeBop86 | 12-19-2011 08:26 PM |
I know this is an old thread, but what did (or still do) you end up using?
| REDrum | 12-19-2011 09:31 PM |
You can pretty much use any 75/90 gear oil w/ a plate LSD, dino or syn. I run Amsoil 75/90 severe duty with mine in my rally car, change it once a year or 4 events. Snap-crackle-pop means its doing its job.
| BeBop86 | 12-19-2011 09:56 PM |
Do you add those friction modifiers too?
| REDrum | 12-19-2011 10:43 PM |
[quote=BeBop86;35921812]Do you add those friction modifiers too?[/quote]
I do not
I do not
| bhhamblin | 12-19-2011 10:48 PM |
I use the Kazz LSD gear oil in my cusco 1.5way rear. It pops and clunks, which is normal.
| BeBop86 | 12-20-2011 07:50 PM |
Thanks for the answers guys.
I'm still curious what Patrick Olsen ended up using...
I'm still curious what Patrick Olsen ended up using...
| Imprezer | 12-20-2011 08:12 PM |
Use the Heavy Duty Shockproof, Patrick. That's what I used in all my CUSCO diffs on WRXs and EVOs we build, raced.
| delongedoug | 12-20-2011 10:07 PM |
[quote=Imprezer;35929884]Use the Heavy Duty Shockproof, Patrick. That's what I used in all my CUSCO diffs on WRXs and EVOs we build, raced.[/quote]
The Messiah has returned! Didn't notice the thread date, methinks.
Oh, and +1 75/90 gear oil. Redline is common.
The Messiah has returned! Didn't notice the thread date, methinks.
Oh, and +1 75/90 gear oil. Redline is common.
| Patrick Olsen | 12-21-2011 07:36 AM |
I tried a variety of things and nothing ever fixed it. Turned out the pinion was actually touching the differential.
[img]http://www.submariner.org/thepno95/Pictures/Subaru/Drivetrain/diff%20wear2.jpg[/img]
[img]http://www.submariner.org/thepno95/Pictures/Subaru/Drivetrain/diff%20wear1.jpg[/img]
[img]http://www.submariner.org/thepno95/Pictures/Subaru/Drivetrain/diff%20wear2.jpg[/img]
[img]http://www.submariner.org/thepno95/Pictures/Subaru/Drivetrain/diff%20wear1.jpg[/img]
| nightcrawler60 | 12-21-2011 07:40 AM |
Wow, scary lookin.
| Imprezer | 12-22-2011 01:58 AM |
Yikes!
Yeah, I did not notice the date, haha...
Patrick, let me guess... You never re-shimmed the pinion after installing the CUSCO diff? I bet that it was not only touching the case of the diff, but it was also binding the ring.
Yeah, I did not notice the date, haha...
Patrick, let me guess... You never re-shimmed the pinion after installing the CUSCO diff? I bet that it was not only touching the case of the diff, but it was also binding the ring.
| Element Tuning | 12-22-2011 04:17 PM |
[quote=BeBop86;35921812]Do you add those friction modifiers too?[/quote]
Unless you are trying to drift you really have to use the friction modifier. My car was way too tail happy without it. As the clutches wear out you might be able to back off the limited slip additive.
These diffs ratchet really badly at parking lot speeds so they aren't ideal for street cars but really work the best on the track, especially if you tend to lift the inside rear wheel like we do.
I've been using Mobil 1 and limited slip additive and I change the oil every season (I don't do a ton of laps however).
Unless you are trying to drift you really have to use the friction modifier. My car was way too tail happy without it. As the clutches wear out you might be able to back off the limited slip additive.
These diffs ratchet really badly at parking lot speeds so they aren't ideal for street cars but really work the best on the track, especially if you tend to lift the inside rear wheel like we do.
I've been using Mobil 1 and limited slip additive and I change the oil every season (I don't do a ton of laps however).
| REDrum | 12-22-2011 04:55 PM |
By adding a modifier you will decrease the force required to break the gates loose and thus reduce force to the wheels. Sure it reduces the snap-crackle-pop, but, if you don't want that on the street go with a helical. Plate diffs are really a race only device. I run plate on my race subie, but helical on my street subie, happily
[quote=Element Tuning;35945595]My car was way too tail happy without it. [/quote]
No idea how you got that to happen, by nature a rear plate LSD keeps it going straight. Unless you are inducing throttle oversteer coming out of a corner, the only way to get the back end loose w/ plate LSD is to lift and disengage the gates. Then you'll get some oversteer, and very fast.
[quote=Element Tuning;35945595]My car was way too tail happy without it. [/quote]
No idea how you got that to happen, by nature a rear plate LSD keeps it going straight. Unless you are inducing throttle oversteer coming out of a corner, the only way to get the back end loose w/ plate LSD is to lift and disengage the gates. Then you'll get some oversteer, and very fast.
| Element Tuning | 12-22-2011 05:31 PM |
[quote=REDrum;35945881]By adding a modifier you will decrease the force required to break the gates loose and thus reduce force to the wheels. Sure it reduces the snap-crackle-pop, but, if you don't want that on the street go with a helical. Plate diffs are really a race only device. I run plate on my race subie, but helical on my street subie, happily[/quote]
It doesn't reduce the popping really and it is a race car. We often lift the inside wheel so the clutch type is best.
[quote=REDrum;35945881]No idea how you got that to happen, by nature a rear plate LSD keeps it going straight. Unless you are inducing throttle oversteer coming out of a corner, the only way to get the back end loose w/ plate LSD is to lift and disengage the gates. Then you'll get some oversteer, and very fast.[/quote]
I guess you're not going fast enough then ;) Of course we are getting on the gas before going straight :lol:
Too much lock up while turning causes more oversteer period! It's why all the drift guys run a very high lock up on the rear diff. The additive lowers the lockup without having to rearrange the plates. It's a night and day difference on our car with and without the friction modifier.
It doesn't reduce the popping really and it is a race car. We often lift the inside wheel so the clutch type is best.
[quote=REDrum;35945881]No idea how you got that to happen, by nature a rear plate LSD keeps it going straight. Unless you are inducing throttle oversteer coming out of a corner, the only way to get the back end loose w/ plate LSD is to lift and disengage the gates. Then you'll get some oversteer, and very fast.[/quote]
I guess you're not going fast enough then ;) Of course we are getting on the gas before going straight :lol:
Too much lock up while turning causes more oversteer period! It's why all the drift guys run a very high lock up on the rear diff. The additive lowers the lockup without having to rearrange the plates. It's a night and day difference on our car with and without the friction modifier.
| REDrum | 12-22-2011 05:47 PM |
[quote=Element Tuning;35946173] Of course we are getting on the gas before going straight[/quote] There is a big difference between rolling in on the gas and jumping on the gas, w/ 600hp that latter will induce oversteer with LSD
[quote=Element Tuning;35946173]
Too much lock up while turning causes more oversteer period![/quote]
Easy with the punctuation there buddy, I have a very different experience with how LSDs effect the car on tarmac. Not all drivelines are set up the same. Are you running a DCCD center diff, and are you running a 1.5 way or 2-way rear diff?
[quote=Element Tuning;35946173]
Too much lock up while turning causes more oversteer period![/quote]
Easy with the punctuation there buddy, I have a very different experience with how LSDs effect the car on tarmac. Not all drivelines are set up the same. Are you running a DCCD center diff, and are you running a 1.5 way or 2-way rear diff?
| Element Tuning | 12-22-2011 06:26 PM |
[quote=REDrum;35946290]There is a big difference between rolling in on the gas and jumping on the gas, w/ 600hp that latter will induce oversteer with LSD[/quote]
Easy with the punctuation there buddy, I have a very different experience with how LSDs effect the car on tarmac. Not all drivelines are set up the same. Are you running a DCCD center diff, and are you running a 1.5 way or 2-way rear diff?[/quote]
Don't be offended, maybe I should have used more smiley faces and winks. You can also leave the driving lessons out of this, you get on the gas as soon as hard as the grip will allow.
I have plenty of experience with all types of diffs from open to locked in the quest for the fastest lap. The only real reason somebody would upgrade the rear differential on their Subaru is because they either fighting rear wheel grip or understeer. On our current time attack car the viscous rear differential resulted in understeer most of the time no matter how the DCCD was set. Eventually at high power it will fail as it fights too much on the light inside wheel.
When testing the Cusco 1.5 with 90% lock up it was drift city everywhere and I was going slower than ever in regards to lap times. Now draining the fluid and adding a limited slip diff additive transformed an ultra tail happy car into a much more manageable and ultimately quicker car. This was a night and day change with no other modifications. As time progressed I was able to continue improving the setup to allow extremely hard acceleration out of corners. Our STi runs Rolex GT lap times now so we know how to setup a fast Subaru.
Easy with the punctuation there buddy, I have a very different experience with how LSDs effect the car on tarmac. Not all drivelines are set up the same. Are you running a DCCD center diff, and are you running a 1.5 way or 2-way rear diff?[/quote]
Don't be offended, maybe I should have used more smiley faces and winks. You can also leave the driving lessons out of this, you get on the gas as soon as hard as the grip will allow.
I have plenty of experience with all types of diffs from open to locked in the quest for the fastest lap. The only real reason somebody would upgrade the rear differential on their Subaru is because they either fighting rear wheel grip or understeer. On our current time attack car the viscous rear differential resulted in understeer most of the time no matter how the DCCD was set. Eventually at high power it will fail as it fights too much on the light inside wheel.
When testing the Cusco 1.5 with 90% lock up it was drift city everywhere and I was going slower than ever in regards to lap times. Now draining the fluid and adding a limited slip diff additive transformed an ultra tail happy car into a much more manageable and ultimately quicker car. This was a night and day change with no other modifications. As time progressed I was able to continue improving the setup to allow extremely hard acceleration out of corners. Our STi runs Rolex GT lap times now so we know how to setup a fast Subaru.
| REDrum | 12-22-2011 07:24 PM |
[quote=Element Tuning;35946605] to allow extremely hard acceleration out of corners[/quote]
Its amazing how forgiving tarmac is. Keep on keepin on :ritz:
Its amazing how forgiving tarmac is. Keep on keepin on :ritz:
| Deuce Cam | 12-22-2011 07:59 PM |
I just installed a brand new cusco rs 1.5 on my corolla and the **** is ****ing loud. Best way to describe it is FREAKING INTENSE!
When shifting during a tight turn I get a bang/clank from the lsd when letting the clutch out. Slow tight turns in 1st gear often yield a BANG, BANG, BANG. I get some odd looks from pedestrians in parking lots :lol:.
It's not for the faint of heart.
When shifting during a tight turn I get a bang/clank from the lsd when letting the clutch out. Slow tight turns in 1st gear often yield a BANG, BANG, BANG. I get some odd looks from pedestrians in parking lots :lol:.
It's not for the faint of heart.
| BeBop86 | 12-22-2011 08:06 PM |
I just installed the diff and filled it with redline 75w90 but didn't add any friction modifier.
It didn't make hardly any noise at first but now it's making even more crackle and pop noises. I know this is normal, but should some friction modifier help out?
It didn't make hardly any noise at first but now it's making even more crackle and pop noises. I know this is normal, but should some friction modifier help out?
| Deuce Cam | 12-22-2011 08:15 PM |
Well, I'm running Motul 90pa in mine. After a few hundred miles I tried adding Ford/Motorcraft friction modifier, and it didn't really help.
| BeBop86 | 12-22-2011 08:52 PM |
Just have to live with the popping then?
Its not causing any harm to itself or other components is it? Just the noise it makes when working? Right?
Its not causing any harm to itself or other components is it? Just the noise it makes when working? Right?
| CamaroFS34 | 12-22-2011 08:55 PM |
[quote=BeBop86;35947571]Just have to live with the popping then?
Its not causing any harm to itself or other components is it? Just the noise it makes when working? Right?[/quote]
All of my LSDs make noise, even the crappy stock one in the Camaro.
The Cusco and the MFactory are both extremely unhappy when I take the WRX to the ice rink, which is on the 8th floor of a parking garage in northern Virginia. If I take the "express ramp," it's a tight spiral from the 2nd floor to the 7th, and I can't keep the wheel in one position with either aftermarket LSD car (the green Camaro or the WRX). And the LSDs are creaking and groaning the whole time... synthetic fluid, plus low speed... yeah, the noises are normal.
Its not causing any harm to itself or other components is it? Just the noise it makes when working? Right?[/quote]
All of my LSDs make noise, even the crappy stock one in the Camaro.
The Cusco and the MFactory are both extremely unhappy when I take the WRX to the ice rink, which is on the 8th floor of a parking garage in northern Virginia. If I take the "express ramp," it's a tight spiral from the 2nd floor to the 7th, and I can't keep the wheel in one position with either aftermarket LSD car (the green Camaro or the WRX). And the LSDs are creaking and groaning the whole time... synthetic fluid, plus low speed... yeah, the noises are normal.
| Deuce Cam | 12-22-2011 10:47 PM |
[quote=BeBop86;35947571]Just have to live with the popping then?
Its not causing any harm to itself or other components is it? Just the noise it makes when working? Right?[/quote]
Supposedly they quiet down a bit after a while, but they'll always make noise (much more than a stock lsd). The cusco unit in my corolla is on a different planet nvh-wise compared to the oem clutch type rear diff. in my 2006 old STI.
There's a similar discussion in a thread on club4ag. I thought this post was fitting:
[quote]Originally Posted by [b]pandakid[/b] >
the lsd will get way more quite,when i first got it sounded like my axles were about to snap and my differential was gonna catapult out the rear end.its normal,overtime it will get really quite.[/quote]
Its not causing any harm to itself or other components is it? Just the noise it makes when working? Right?[/quote]
Supposedly they quiet down a bit after a while, but they'll always make noise (much more than a stock lsd). The cusco unit in my corolla is on a different planet nvh-wise compared to the oem clutch type rear diff. in my 2006 old STI.
There's a similar discussion in a thread on club4ag. I thought this post was fitting:
[quote]Originally Posted by [b]pandakid[/b] >
the lsd will get way more quite,when i first got it sounded like my axles were about to snap and my differential was gonna catapult out the rear end.its normal,overtime it will get really quite.[/quote]
| bhhamblin | 12-22-2011 11:04 PM |
I don't think the noise will go away. I've had mine for around 10k miles. Still sounds the same. I also use the Cusco 1 way front LSD, its funny too.
| old_duwel | 12-22-2011 11:46 PM |
i have a 2 way Cusco LSD and had it since 2005. i use the Super Cusco LSD 80W140 and it does make the diff quiet. but, you will still hear the clunk and popping. pretty much almost all 1.5 or 2 way LSD's do that. if you can find this fluid, you'll probably be happy with it.
[img]http://farm5.staticflickr.com/4154/5022848000_7b4d9af4ac_b.jpg[/img]
one time, i did change the fluid to normal Cusco LSD fluids and the noise did get louder. a week later i change it back to Super Cusco LSD fluids. Since i run at the gymkhana events every month. i change mine about every 3-4 months. the fluids normally run me about $40.
my Cusco 2 way LSD was the best investment i have every made. it makes my car glides across the tarmac.
[img]http://farm5.staticflickr.com/4154/5022848000_7b4d9af4ac_b.jpg[/img]
one time, i did change the fluid to normal Cusco LSD fluids and the noise did get louder. a week later i change it back to Super Cusco LSD fluids. Since i run at the gymkhana events every month. i change mine about every 3-4 months. the fluids normally run me about $40.
my Cusco 2 way LSD was the best investment i have every made. it makes my car glides across the tarmac.
| Deuce Cam | 12-23-2011 01:02 AM |
[quote=old_duwel;35948572]i have a 2 way Cusco LSD and had it since 2005. i use the Super Cusco LSD 80W140 and it does make the diff quiet. but, you will still hear the clunk and popping. pretty much almost all 1.5 or 2 way LSD's do that. if you can find this fluid, you'll probably be happy with it.
one time, i did change the fluid to normal Cusco LSD fluids and the noise did get louder. a week later i change it back to Super Cusco LSD fluids. Since i run at the gymkhana events every month. i change mine about every 3-4 months. the fluids normally run me about $40.
my Cusco 2 way LSD was the best investment i have every made. it makes my car glides across the tarmac.[/quote]
I thought about using that, but it's really expensive in the US. It's $30/qt. so $60 every oil change. That doesn't include shipping. I may still give it a try.
People with kaaz diffs have the same issue, and many say the kaaz lsd oil isn't any better at quieting the diff down. To me it seems reasonable that the cusco stuff wouldn't be any different. I'm assuming they're all just rebranded oil anyway.
It's a tough decision because I can get a 2qt. bottle of motul 90pa locally for $20-25.
one time, i did change the fluid to normal Cusco LSD fluids and the noise did get louder. a week later i change it back to Super Cusco LSD fluids. Since i run at the gymkhana events every month. i change mine about every 3-4 months. the fluids normally run me about $40.
my Cusco 2 way LSD was the best investment i have every made. it makes my car glides across the tarmac.[/quote]
I thought about using that, but it's really expensive in the US. It's $30/qt. so $60 every oil change. That doesn't include shipping. I may still give it a try.
People with kaaz diffs have the same issue, and many say the kaaz lsd oil isn't any better at quieting the diff down. To me it seems reasonable that the cusco stuff wouldn't be any different. I'm assuming they're all just rebranded oil anyway.
It's a tough decision because I can get a 2qt. bottle of motul 90pa locally for $20-25.
| bhhamblin | 12-23-2011 02:41 AM |
This is what I use in the rear, seems to be fine. $45 for 2 litres.
[IMG]http://www.monkeywrenchracing.com/images/KAZ-71259-104.jpg[/IMG]
[IMG]http://www.monkeywrenchracing.com/images/KAZ-71259-104.jpg[/IMG]
| old_duwel | 12-23-2011 04:27 AM |
[quote=bhhamblin;35949280]This is what I use in the rear, seems to be fine. $45 for 2 litres.
[IMG]http://www.monkeywrenchracing.com/images/KAZ-71259-104.jpg[/IMG][/quote]
i used that before but it still was making noises. the KAAZ 80W90 seems like it is the same stuff as Cusco 80W90. but the Cusco 80W140 is alot better and makes it quieter. it still makes noise but not that loud. i drove around today and i barely heard my diff.
[IMG]http://www.monkeywrenchracing.com/images/KAZ-71259-104.jpg[/IMG][/quote]
i used that before but it still was making noises. the KAAZ 80W90 seems like it is the same stuff as Cusco 80W90. but the Cusco 80W140 is alot better and makes it quieter. it still makes noise but not that loud. i drove around today and i barely heard my diff.
| old_duwel | 12-23-2011 04:30 AM |
[quote=Deuce Cam;35948915]I thought about using that, but it's really expensive in the US. It's $30/qt. so $60 every oil change. That doesn't include shipping. I may still give it a try.
People with kaaz diffs have the same issue, and many say the kaaz lsd oil isn't any better at quieting the diff down. To me it seems reasonable that the cusco stuff wouldn't be any different. I'm assuming they're all just rebranded oil anyway.
It's a tough decision because I can get a 2qt. bottle of motul 90pa locally for $20-25.[/quote]
give it a try once and see. if you don't like it then don't buy it anymore. make sure you get the 80W140.
People with kaaz diffs have the same issue, and many say the kaaz lsd oil isn't any better at quieting the diff down. To me it seems reasonable that the cusco stuff wouldn't be any different. I'm assuming they're all just rebranded oil anyway.
It's a tough decision because I can get a 2qt. bottle of motul 90pa locally for $20-25.[/quote]
give it a try once and see. if you don't like it then don't buy it anymore. make sure you get the 80W140.
| bhhamblin | 12-23-2011 09:48 AM |
I like the noise, lets me know its still there and working ;)
| Element Tuning | 12-23-2011 11:14 AM |
Like REDrum and I recommend, for anyone reading this, a Torsen limited slip is absolutely the best for street if you need to upgrade from the viscous OEM.
No matter what fluid and no matter how much you break in the Cusco clutch diff, it will ratchet and pop at parking lot speeds. Once up to speed I can't say that I hear or feel anything.
The fluids from my experience can help dial in the diff action or smoothness on track but won't get rid of the parking lot noise.
No matter what fluid and no matter how much you break in the Cusco clutch diff, it will ratchet and pop at parking lot speeds. Once up to speed I can't say that I hear or feel anything.
The fluids from my experience can help dial in the diff action or smoothness on track but won't get rid of the parking lot noise.
| BeBop86 | 12-23-2011 01:40 PM |
Gotcha.
Well, I autoX a lot and have the habit of lifting my inside rear wheel often, which is why I went with a clutch-type LSD... I also already have a helical in the front.
Thanks.
Well, I autoX a lot and have the habit of lifting my inside rear wheel often, which is why I went with a clutch-type LSD... I also already have a helical in the front.
Thanks.
| REDrum | 12-23-2011 01:48 PM |
[quote=BeBop86;35947571]Just have to live with the popping then?
Its not causing any harm to itself or other components is it? Just the noise it makes when working? Right?[/quote]
I know this is a moderately snarky* comment, but reading all these posts of concern about plate LSDs making snap-crackle-pop noises is like reading posts of concern that someone's aftermarket BOVs keeps making a loud swooshing noise everytime they lift off the gas.
Plate diffs for a DD = crazy town
[COLOR="Silver"][SIZE="1"](*IMO, being over 45 entitles people to be snarky)[/SIZE][/COLOR]
Its not causing any harm to itself or other components is it? Just the noise it makes when working? Right?[/quote]
I know this is a moderately snarky* comment, but reading all these posts of concern about plate LSDs making snap-crackle-pop noises is like reading posts of concern that someone's aftermarket BOVs keeps making a loud swooshing noise everytime they lift off the gas.
Plate diffs for a DD = crazy town
[COLOR="Silver"][SIZE="1"](*IMO, being over 45 entitles people to be snarky)[/SIZE][/COLOR]
| Deuce Cam | 12-23-2011 02:00 PM |
[quote=REDrum;35951947]I know this is a moderately snarky* comment, but reading all these posts of concern about plate LSDs making snap-crackle-pop noises is like reading posts of concern that someone's aftermarket BOVs keeps making a loud swooshing noise everytime they lift off the gas.
Plate diffs for a DD = crazy town
[COLOR=silver][SIZE=1](*IMO, being over 45 entitles people to be snarky)[/SIZE][/COLOR][/quote]
I'm pretty sure the stock rear lsd on 04-06 STI's is a clutch type, and it's not crazy.
I realize an aftermarket clutch type lsd is a completely different story than a oem spec one.
I don't like that the Torsen lsd's basically act like an open diff. if a wheel lifts = fail.
Plate diffs for a DD = crazy town
[COLOR=silver][SIZE=1](*IMO, being over 45 entitles people to be snarky)[/SIZE][/COLOR][/quote]
I'm pretty sure the stock rear lsd on 04-06 STI's is a clutch type, and it's not crazy.
I realize an aftermarket clutch type lsd is a completely different story than a oem spec one.
I don't like that the Torsen lsd's basically act like an open diff. if a wheel lifts = fail.
| BeBop86 | 12-23-2011 02:07 PM |
I think it's only 04 STI that does.
| Element Tuning | 12-23-2011 02:33 PM |
[quote=BeBop86;35951888]Gotcha.
Well, I autoX a lot and have the habit of lifting my inside rear wheel often, which is why I went with a clutch-type LSD...
Thanks.[/quote]
You made the right choice then. Live with the popping, it's normal.
Well, I autoX a lot and have the habit of lifting my inside rear wheel often, which is why I went with a clutch-type LSD...
Thanks.[/quote]
You made the right choice then. Live with the popping, it's normal.
| Deuce Cam | 12-23-2011 03:24 PM |
I personally love the cusco lsd. It completely transformed the feel of my car. There's way more grip, and the car feels way more stable/planted in the twisties and during constant road elevation changes. The car had an open diff. before :(
The noises don't bother me much considering all the other mods I have. If anyone asks I just say "BECAUSE RACE CAR." :lol:
[quote=BeBop86;35952076]I think it's only 04 STI that does.[/quote]
The mechanical clutch rear lsd is the same on all 04-06 sti's. '07+ all have the Torsen rear lsd.
The noises don't bother me much considering all the other mods I have. If anyone asks I just say "BECAUSE RACE CAR." :lol:
[quote=BeBop86;35952076]I think it's only 04 STI that does.[/quote]
The mechanical clutch rear lsd is the same on all 04-06 sti's. '07+ all have the Torsen rear lsd.
| BeBop86 | 12-23-2011 04:44 PM |
Well, I think I know why it's gotten noisier... I'm still within the first 500 miles of break in and when sampling the fluid, it's pure black... almost a bit metallic.
We'll see how it is after I change the fluid and add friction modifier.
We'll see how it is after I change the fluid and add friction modifier.
| Patrick Olsen | 12-26-2011 10:34 AM |
[quote=Imprezer;35940961]Patrick, let me guess... You never re-shimmed the pinion after installing the CUSCO diff? I bet that it was not only touching the case of the diff, but it was also binding the ring.[/quote]
I didn't do it myself. It was installed by Rallispec, who knows a thing or two about Subaru diffs. I can't imagine Dave would've missed something so basic. I'm not sure the binding against the diff case is something that you would catch on a bench as you're checking the pinion depth and gear mesh pattern.
I didn't do it myself. It was installed by Rallispec, who knows a thing or two about Subaru diffs. I can't imagine Dave would've missed something so basic. I'm not sure the binding against the diff case is something that you would catch on a bench as you're checking the pinion depth and gear mesh pattern.
| GTEASER | 04-28-2015 01:49 AM |
Bookmarked for reference.
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