Ive been looking at T56's as Im going to start gathering parts for the A4 to M6 swap soon.

However, Im seeing a lot of trannys from LS1 F-bodys and C5 Corvettes, and not so many form LT1 Fbodies.

Can an LS1 T56 be used with my LT1? What modifications to the transmission would ned to be made?

What about the Corvette transmissions? What needs to be done to use one of those?

Finally, would the $$ and labor needed to use an LS1 tranny outweigh the conveniance of finding one easily. Basically, should I just keep looking until i find a good LT1 trannny?

Thanks

 

The short answer is get one from a 94-97, the LS1 tranny has a longer pilot shaft and uses a reverse actuated clutch (something wierd like that). I just did the swap when my 93 tranny blew and the shop had a 98 tranny but had to swap to a 94-97 inpt shaft and bell housing to install in my car, but after all that it works great. Before you install any tranny though, get the steal 3-4 shift fork mod.

 

I would stick with an LT1 T56 if I was looking to do that swap. LS1 guys have reported far more problems with their trannies than do LT1's. The LT1 T56was made by Borg Warner from 93-97, then in 98 they were produced by Tremec (in Mexico) for the LS1's. There were several internal changes made to the T56 when Tremec took over, and it doesn't seem that they were an improvement. Also the 94-97 t56 is rated to handle 450ft/lbs, the LS1 t56 is 400 ft/lbs. Unless I got a really good deal on an LS1 t56 I would just look for an LT1 t56.

 

Getting the C5 tranny to work in our cars would be nothing short of a miracle. The C5 has a transaxle which makes it a complete rear-end swap and fabrication job... not that it couldn't be done with time and talent... but I hope you're good with a TIG and a plasma cutter

 

Yep, the C5's trans is rear mounted to help with weight distribution. That would be badass on an F-Body though.