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If there was a like or heart icon... you would get it. Great stuff.
 

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1987 Toyota Supra
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257 Posts
If anyone has a request for gear ratio or upgrades let me know... Otherwise will probably set up the ones I have as 3.73's mostly. Might upgrade them to 29 spline as well. 3.58 is always an option too.....
 

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Piratetip is the man! Got him buy for me a stock oem turbo diff and rebuilt it. He then upgraded with Weer Performance LSD street/race package and last installed a 3.5 rear gear ratio to match my 6 speed V160 transmission in my mk3.
I broke in the diff with instuctions given by him...and since then I push 850whp every day and banging gears like hell hahaha ALL GOOD 5 years now. Damn time flies so fast , ain't that right Nick? :cool:
 

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1987 Toyota Supra
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257 Posts
Its been 5 years already?
Dang....
Yes you are right, time does fly!
Very glad the diff is performing well for you, always happy to hear back from people. :D

As of today I finished fiddling around with the Lexus T2 Torsen LSD carrier I bought to experiment around with.
Finished the modifications needed to have it a drop in unit into the MKIII diff now....
Nice to know there is a new source for some really Stout Torsen carriers.
 

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that twin 2jz guy
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2,595 Posts
Its been 5 years already?
Dang....
Yes you are right, time does fly!
Very glad the diff is performing well for you, always happy to hear back from people. :D

As of today I finished fiddling around with the Lexus T2 Torsen LSD carrier I bought to experiment around with.
Finished the modifications needed to have it a drop in unit into the MKIII diff now....
Nice to know there is a new source for some really Stout Torsen carriers.

with a little more work, what are the chances of getting some stronger gears in that housing and a final ratio of 3.26?
 

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1987 Toyota Supra
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257 Posts
There are no 3.26 gears that fit this specific 8" housing.
Best luck is finding a Group A race team original R&P set. ( Extremely rare )
Or have a set custom made.
Or switch to a different differential setup entirely.
I've looked into this multiple times as have many others.

The gears are plenty strong enough to handle 800-900 HP.
As long as you aren't shock loading them heavily or drag racing with them.
 

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that twin 2jz guy
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2,595 Posts
last time i was at the track.. the track and tires (mickey Drag radials) got so sticky.. launching off the line.. the tires stuck and the pinion spun = (ring gear FATALITY). It ate entire section of the ring gears teeth. so i need something stronger. I mainly do 1/2 mile racing and cars making 1156rwhp. I dont want to switch out the "Toyota" rear end but think the Ford 8.8 is my only option.
 

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1987 Toyota Supra
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257 Posts
You are the 3rd person now I am hearing this kind of failure from this year.
The teeth are most likely being taken out because of the crush sleeve going sloppy and allowing too much pinion deflection. ( Gear mesh pattern gets pushed way high up on the ring gear face)
Drag racing on one these diffs is really pushing their limits.
I can mitigate the pinion defelction by using the solid collar , but something else will give next if you are launching heavy with drag radials.
The next likely failure is going to be snapping the pinion head off right where the radius is cut before stepping up to the larger shaft diameter where the inner pinion bearing is pressed on.

My advice, don't use this diff for drag racing.
They are really strong, but they do have their limits.

I can build one for drag racing, but it's 1/2 life or life to failure will be unknown.

Move to the Ford 8.8.
 

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1987 Toyota Supra
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257 Posts
To follow up. This white paper / research study illustrates perfectly my comment on pinion gear deflection.
The primary cause of all these people shearing the ring gear teeth off.
Pinion deflects away from the ring, forcing the pattern high on the face.
Not as much material in that area, ring teeth fracture.
The problem Cascades and takes out the tooth deep in the root and surrounding teeth.

http://www.geartechnology.com/issues/0809x/xu.pdf
 

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that twin 2jz guy
Joined
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2,595 Posts
To follow up. This white paper / research study illustrates perfectly my comment on pinion gear deflection.
The primary cause of all these people shearing the ring gear teeth off.
Pinion deflects away from the ring, forcing the pattern high on the face.
Not as much material in that area, ring teeth fracture.
The problem Cascades and takes out the tooth deep in the root and surrounding teeth.

http://www.geartechnology.com/issues/0809x/xu.pdf
awesome feedback. Thank you.
 

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1987 Toyota Supra
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257 Posts
Building up another 3.73 MKIII Diff with a T2 Torsen Converion :D
 
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