just to let you know now i searched everywhere for this and found nothing that helped.

I have a na rear differential with t2 tranny, after realizing that I needed to buy a new drive shaft (t2 drive shaft to fit new t2 tranny), then after getting new drive shaft I realized that the t2 drive shaft dose not fit the na rear differential. So should I get a new t2 rear differential so that all my new parts are t2. I have a 88na rear end now. Can I put in a 88 t2 rear differential or some other year.

 

Yes you can swap any diferential from 86-91 to any FC 86-91; or the other option is to purchase a FC AUTO NA driveshaft.

 

Ive got an auto drieshaft if you want it. pm if interested

 

Remember though, that if you use the auto drive shaft while it will bolt up; is about 1 inch short and only about half of the input shaft will go into the tranny.

I don't know if I would trust only half the drive shaft's input shaft being used with a Turbo motor.

 

Thanks for the correction, since I just passed that one just as I receive it.

 

thanks this helps a lot. I was thinking about just welding a 1in block of metal on the end of the Flange that connects to the the rear differential and getting longer screws to put through the extended block.

 

Might be better having a piece of alum machined to perfect round and using that as a spacer. Remember it goes around 4 times for every time a wheel makes a single revolution.

Welding is a very imprecise (weight/balance wise) way to do it.

 

It might be a bitch to put in longer studs if going with any of the two options. The diff kind of blocks the rear of the flange.