I have the opportunity to get a used 10 bolt 99 trans am posi 3:73 torsen unit for my iroc.. It was rebuilt 60k miles ago. I know it will fit, but heard the back wheels will stick out a bit.. Anyone know more about this setup for third gens? Pros/cons?

 

Pro's:

-Cheap
-Disk Brakes
-Posi
-Nice Gearing
-Bolts right in (wheels stick out 1.5" or so more than 3rd gen offset)

Cons:

Is just as weak as any other 10 bolt.
Will not survive with power and traction. If you just roast the tires it will survive.

 

How would I fix the offset?

 

New wheels. Use the search function and you'll have plenty to read.

 

By the time you go buy new rear wheels with a 4th gen offset, you're better off just to buy a 9" or 12 bolt. I personally wouldn't waste the time with swapping a 10 bolt from a 4th gen. That said, pros are listed above but don't matter if you break it the first time you hook real good.

 

I did this swap last year to buy me time before I go to a 9 or 8.8 rear. It was easy as I simply bought a set of used C5 wheels. Cost me 300 bucks for the set and 250 for the rear. Also got some 2 inch wheel spacers for the front wheels on ebay for about 60 bucks. Way less than spending 3 grand on a built rear end!

Not sure if it will make any difference but I found a used TA girdle that I paid 50 bucks for. Tossed it on so maybe it won't blow up as fast when I do my LS swap. (Not counting on it though)

 

cool deal. I scored my rear for $300. What did you do about hooking the cable up? I heard some fabrication is required

 

E Cables

ACDelco 18P1104

are a direct fit for this swap