NEW Rear Differential Upgrade from TRE
Feb 28, 2011, 07:31 PM
#61
Currently an OS Giken rear diff, but also have run a cusco and modified stock previously. The stock diff was replaced because it's slow.
Maybe you could help us out since you've obviously experienced this problem. How much torque/power are you making? What are your normal 60' times? How many launches did you do before your bearing fell off?
Maybe you could help us out since you've obviously experienced this problem. How much torque/power are you making? What are your normal 60' times? How many launches did you do before your bearing fell off?
As for my power level. I know I trapped 122mph (somewhere in the high 400' AWHP) in the quarter and have somewhere around 50 launches. I also change the fluid twice a year. On average 1.6-1.7 60'
BTW don't think the OS Giken is an evo diff thou. I pulled it off Google images.
Last edited by awdboosted; Feb 28, 2011 at 08:00 PM.
Mar 1, 2011, 07:30 AM
#62
Currently an OS Giken rear diff, but also have run a cusco and modified stock previously. The stock diff was replaced because it's slow.
Maybe you could help us out since you've obviously experienced this problem. How much torque/power are you making? What are your normal 60' times? How many launches had you done before your bearing fell off?
Maybe you could help us out since you've obviously experienced this problem. How much torque/power are you making? What are your normal 60' times? How many launches had you done before your bearing fell off?
Mar 1, 2011, 08:51 AM
#63
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I have the whole new TRE rear diff 12-plate MAX LOCK, the oil sight glass, the upgraded HD cover, etc., etc. We will be installing it, along with a fully built TRE custom ratio transmission, and a fully built non-acd t-case with the WaveTrac LSD in the next few weeks. Cannot wait to test these out! Jon is a terrific guy to work and speak with and he really does great work and his attention to detail and knowledge are really impressive. 
We will post results and feedback soon!
We will post results and feedback soon!
Mar 7, 2011, 11:29 AM
#65
so i was going to do this mod, but for the HD side cover for the cusco will there be any shimming required? Tried to contact Jon via phone and e-mail, no response. AMS said maybe, and otherwise I don't know. I thought it would be a simple swap but is it going to be more complicated for the Cusco? I didn't think it would be but then again I don't know what's attached to what in regards to this part...
anyone else have the cusco and got this mod? there must be if he's got one specifically for the cusco..
anyone else have the cusco and got this mod? there must be if he's got one specifically for the cusco..
Mar 7, 2011, 02:08 PM
#66
so i was going to do this mod, but for the HD side cover for the cusco will there be any shimming required? Tried to contact Jon via phone and e-mail, no response. AMS said maybe, and otherwise I don't know. I thought it would be a simple swap but is it going to be more complicated for the Cusco? I didn't think it would be but then again I don't know what's attached to what in regards to this part...
anyone else have the cusco and got this mod? there must be if he's got one specifically for the cusco..
anyone else have the cusco and got this mod? there must be if he's got one specifically for the cusco..
Mar 7, 2011, 02:39 PM
#68
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I remember that Jon told me one of the aftermarket diffs he liked was the OS Giken You can see the comparison in the pictures, how the bearing post is much larger then stock. Also see how the OS Giken doesn't appear to be cast but CNC bilet steel. This was the best picture I could find to compare. The price tag kinda high thou, This is a cheaper alternative, actually over. It's cheaper because you can get his 12 plate max lock service, adding the cover, oil sight glass upgrade, and round trip shipping for well under $1,000
As for my power level. I know I trapped 122mph (somewhere in the high 400' AWHP) in the quarter and have somewhere around 50 launches. I also change the fluid twice a year. On average 1.6-1.7 60'
BTW don't think the OS Giken is an evo diff thou. I pulled it off Google images.
As for my power level. I know I trapped 122mph (somewhere in the high 400' AWHP) in the quarter and have somewhere around 50 launches. I also change the fluid twice a year. On average 1.6-1.7 60'
BTW don't think the OS Giken is an evo diff thou. I pulled it off Google images.
funny that john shepherd built me an os geiken lsd two months ago that get shipped out to me soon with other goodies, so guess they make an evo lsd....
Mar 8, 2011, 08:00 AM
#69
Kyooch, Why not just pull the diff yourself and send it into TRE. That is a lot of money. Removal and install may take 1.5 hours at most. I don’t know who you’re using and I'd rather not but that is very expensive.
Mar 8, 2011, 01:24 PM
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It's a great diff but super expensive. The Max lock with all the mods is a great alternative to people that aren’t willing to spend over 2K rear diff upgrade. The Max lock works just as well; In fact Marty Grand runs the Max lock diff in his Evo and he won SCCA T2 championship in 2010
Kyooch, Why not just pull the diff yourself and send it into TRE. That is a lot of money. Removal and install may take 1.5 hours at most. I don’t know who you’re using and I'd rather not but that is very expensive.
Kyooch, Why not just pull the diff yourself and send it into TRE. That is a lot of money. Removal and install may take 1.5 hours at most. I don’t know who you’re using and I'd rather not but that is very expensive.
Mar 8, 2011, 01:56 PM
#73
That's how much mine was including everything - but back then the cover wasn't available - take everything back off, reshim, add the part, etc is another matter.
Cost wise, not considering install for both the Tre is 465 and the cusco was 950 +300 to shim the cusco. Tre takes 2-3 weeks, cusco takes less than a day, and provides slightly more lock up/oversteer. I couldnt have the car down so that's what I went with. If I had a daily I'm sure I would have gone with the tre as well.
Cost wise, not considering install for both the Tre is 465 and the cusco was 950 +300 to shim the cusco. Tre takes 2-3 weeks, cusco takes less than a day, and provides slightly more lock up/oversteer. I couldnt have the car down so that's what I went with. If I had a daily I'm sure I would have gone with the tre as well.
Mar 8, 2011, 08:55 PM
#74
lol talked to jon@tre today for a good amount of time. great, great guy, i wish he did all my transmission work.
anyway cusco does indeed need to be reshimmed, as someone mentioned earlier in the thread. im basically just looking at the funding right now for a shop to remove and replace the rear diff.. i wish i had the mechanical know how to do it myself i'd save quite a bit of money.. well that and i wouldnt want to screw anything up.. it's not as simple as unbolting the left, right and middle is it? lol
in any case i will make my final decision tomorrow, not that anyone cares lol just an update and i def think it is important for anyone who is using their car in a competitive manner
anyway cusco does indeed need to be reshimmed, as someone mentioned earlier in the thread. im basically just looking at the funding right now for a shop to remove and replace the rear diff.. i wish i had the mechanical know how to do it myself i'd save quite a bit of money.. well that and i wouldnt want to screw anything up.. it's not as simple as unbolting the left, right and middle is it? lol
in any case i will make my final decision tomorrow, not that anyone cares lol just an update and i def think it is important for anyone who is using their car in a competitive manner
Mar 9, 2011, 06:56 AM
#75
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lol talked to jon@tre today for a good amount of time. great, great guy, i wish he did all my transmission work.
anyway cusco does indeed need to be reshimmed, as someone mentioned earlier in the thread. im basically just looking at the funding right now for a shop to remove and replace the rear diff.. i wish i had the mechanical know how to do it myself i'd save quite a bit of money.. well that and i wouldnt want to screw anything up.. it's not as simple as unbolting the left, right and middle is it? lol
in any case i will make my final decision tomorrow, not that anyone cares lol just an update and i def think it is important for anyone who is using their car in a competitive manner
anyway cusco does indeed need to be reshimmed, as someone mentioned earlier in the thread. im basically just looking at the funding right now for a shop to remove and replace the rear diff.. i wish i had the mechanical know how to do it myself i'd save quite a bit of money.. well that and i wouldnt want to screw anything up.. it's not as simple as unbolting the left, right and middle is it? lol
in any case i will make my final decision tomorrow, not that anyone cares lol just an update and i def think it is important for anyone who is using their car in a competitive manner
Quite honestly kyooch, removing and reinstalling the rear diff is cake! There is nothing weird or crazy you have to worry about when doing so. It all comes apart and goes back in very easily and it is DEF something I would recommend doing yourself. Lmk if you have any questions or need the service manual or whatever.
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