Stock Differentials

[CRsupraiii]

Hey all,

Almost finished with my 1JZ swap, and I am going to be replacing my stock open 4.30 with a 3.91 LSD, but before I do I read somewhere about a weak link in the stock diff and I wanted to address this before installation..... Except I can't remember what it was.... So yeah I was hoping that someone would be able to give me some more info!! This is for a street car on stock twins looking for right around 3 at the wheels. Thanks for reading!!


- Joe
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[WI88Supra]

At 300-400 wheel you will not have any issues with the stock LSD at all.

I'll let you know how it stands up to 700 wheel in a few weeks.

 

[mecevans]

The weak link is the crush sleeve. If the lash is good i would just leave it. Just make sure you loctite and torque all the bolts back there.

 

[CRsupraiii]

Thanks for the info you two!!!

I apologize for my inexperience, but lash is checked with a torque wrench on the input shaft yes? How would this be checked on a differential that is off of a car?


- Joe
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[mecevans]

No thats pinion preload. Grab the input flange and wiggle it back and forth, should feel tight. You can also pull the cover and look at where the wear is. It should be in the center. ,

 

[CRsupraiii]

Can't budge it! Feels good, gonna slap her in as is plus a little 75W90 Redline!!! Any personal experience with this fluid? Need to add more friction modifier? Thanks a ton guys!!


- Joe
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[mecevans]

Get the redline with no addative. I think its called NS. Add your own friction modifier.

 

[CRsupraiii]

Balls I already have 75w90....


- Joe
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[CRsupraiii]

Friction modifier+Redline 75W90? Anyone have good volumes they can share? I believe I should add some I just don't know how much...

- Joe
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