it's a 92 rs 25th with the 305 tbi and i need a posi but i don't what kind of rear end is in it?

 

2.73 Limited slip

 

I'm pretty sure that it's a 10-bolt 2.73 open rear. That's what most of the RS's came with stock. The two definite ways to check are to check your RPO codes (should be code GU2) and/or jack the car up and physically look at the rear you have.

 

 

OK, where do I find these RPO codes?

I've been looking everywhere & can't find them.

I even looked for a build tag like Ford has in the door jamb.

 

I believe on your car they will be inside the locked storage door in the rear hatch. You can always go to the dealer and give them your VIN and they can print out an RPO sheet for you as well for free.

 

OK, found the RPO codes & have the GU2 tag.


Now, how can I get this thing turning posi? Do I have to swap out the whole rearend or will swapping the third member do it? :shrug: :shrug: :shrug:

 

just replace the differential with something like an eaton.

 

if its the stock 92 rear end (28 spline axles), talk to slp. $99 and youll have posi

 

SLP ran out of stock a long time ago. No more $99 posi. The eaton unit is better anyways.