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Shep upgraded rear diff

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Old Jul 23, 2010, 06:36 AM
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Shep upgraded rear diff

If you haven't done this yet you should, it actually has fixed some of the built in understeer these cars have, the more I drove it the more benifits ive seen, one is it drives more like a rear drive car and two off the line traction has greatly improved. Takes just under an hour with hand tools to swap the diff out on a lift, be sure to use a trans jack to support the front. Another install note is be sure to run factory Diaqueen LSD fluid, the dif will chatter for a few miles on tight turns, Shep suggested to do some figure eights in a parking lot to break in the clutch's, I now have zero noise in any situation.
Old Jul 23, 2010, 06:19 PM
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Originally Posted by CBRE
If you haven't done this yet you should, it actually has fixed some of the built in understeer these cars have, the more I drove it the more benifits ive seen, one is it drives more like a rear drive car and two off the line traction has greatly improved. Takes just under an hour with hand tools to swap the diff out on a lift, be sure to use a trans jack to support the front. Another install note is be sure to run factory Diaqueen LSD fluid, the dif will chatter for a few miles on tight turns, Shep suggested to do some figure eights in a parking lot to break in the clutch's, I now have zero noise in any situation.
How quick was your turnatound time from Shep?

How comparable is this to TRE's Maaxlock rear diffs?
Old Jul 24, 2010, 02:47 AM
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Originally Posted by Blue Evo 8
How quick was your turnatound time from Shep?

How comparable is this to TRE's Maaxlock rear diffs?
Couple of days and I believe it to be the same service, it's the way the EVO should have been stock.
Old Jul 24, 2010, 03:52 AM
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Originally Posted by CBRE
If you haven't done this yet you should, it actually has fixed some of the built in understeer these cars have, the more I drove it the more benifits ive seen, one is it drives more like a rear drive car and two off the line traction has greatly improved. Takes just under an hour with hand tools to swap the diff out on a lift, be sure to use a trans jack to support the front. Another install note is be sure to run factory Diaqueen LSD fluid, the dif will chatter for a few miles on tight turns, Shep suggested to do some figure eights in a parking lot to break in the clutch's, I now have zero noise in any situation.
Why factory oil and not MT 90? Shep usually suggest the Redline over factory
Old Jul 24, 2010, 06:15 AM
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Originally Posted by Kirbyryu
Why factory oil and not MT 90? Shep usually suggest the Redline over factory
Nope, Diaqueen only.
Old Jul 24, 2010, 06:24 AM
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Originally Posted by Kirbyryu
Why factory oil and not MT 90? Shep usually suggest the Redline over factory
For the tranny, yes. Not the diffs.
Old Jul 24, 2010, 10:18 AM
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Nice, sounds pretty comparable to the Tre. I actually got the cusco 1.5 way rs, just cuz of some difficulty contacting some people etc, but i'm sure they all work fairly similarly.

definitely something all usdm ct9a cars should do!
Old Jul 26, 2010, 07:00 AM
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Does anyone auto-x or road race with this (or a TRE max-lock) diff who'd be willing to answer a PM from yours truly? TIA
Old Jul 26, 2010, 02:50 PM
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Originally Posted by FJF
Does anyone auto-x or road race with this (or a TRE max-lock) diff who'd be willing to answer a PM from yours truly? TIA
There's some good threads on these in the drivetrain and motorsports forums. Not sure why this is still in this forum to be honest.
Old Aug 4, 2010, 01:56 PM
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Originally Posted by FJF
Does anyone auto-x or road race with this (or a TRE max-lock) diff who'd be willing to answer a PM from yours truly? TIA
i have the cusco 1.5 way in the back and i autocross, but i also have the gruppe-s acd reflash too
Old Aug 4, 2010, 01:59 PM
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Last edited by FJF; Aug 4, 2010 at 02:01 PM. Reason: never mind
Old Aug 4, 2010, 02:00 PM
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Originally Posted by delongedoug
There's some good threads on these in the drivetrain and motorsports forums.
I'll stop by. Thanks.
Old Aug 4, 2010, 02:01 PM
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Last edited by kyoo; Aug 4, 2010 at 02:31 PM.
Old Aug 4, 2010, 02:04 PM
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Originally Posted by kyooch
yea sorry i just pmd you -

when i had just the gruppe-s acd reflash i didn't drive the car aggressively enough to notice a difference. once i got both i went autocrossing, but i wasnt able to test either individually, the gruppe-s cuz i was only driving on the street, and the rear lsd because i already had the gruppe-s at that point
Ahh...I understand. I deleted the post after I got your PM, as it's easier to discuss things that way. Thanks very much for getting in touch!
Old Aug 17, 2010, 12:37 PM
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Care to share your questions and the answers FJF? Typically you would be one to ask quality questions we are all likely wondering.


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