got an 86 T/A. got a chance to buy a Torsen posi with 3.73 gears, Ive got the 2.73's now and no posi.

Will it work or not? or what parts will I need to get it to work?

Thanks

 

It will work. I bought one from slp about two years ago that was taken out when new. It droped right in.

 

It will most likely just bolt right in, but you'll need 28 spline axles. Your axles are 26 spline.

 

You will need to change out to the 88 (or is it 89?) and newer 28 spline axle shafts to run the 4th gen rear. Other than that, it's a bolt in swap.

 

I just finished the intall on my 4th gen rear to my 87 GTA the only thing is that it only burns 1 tire sumtimes but then it will burn both other times anybody kno why it would do this???? it from a 95 Z28 with the LT1 and automatic trans also what size it the rear off the 95 z28 a 7.5" or 8.5" etc

Thanks in advance

 

thanks for the replies I'll have to see what I can find in axles

 

It's 7.5/7.625". It does the one wheel peel because the LT1 rears had a clutch type posi, whereas the LS1 rears had worm gears instead of clutches.

 

so i should add the additive or leave it alone

 

There should have been a small metal tag attached to one of the bolts that holds the rear end cover to the axle. If it said use LSD addative then yes, or if it is a GM limited slip rear end then yes. I know on the LS car it's a lube of LSD addative and 75w140 synthetic gear oil. Not sure about the LT1 axles though. Just call a dealer if you are unsure what should be in there.