um....Z31 turbo autos can barely handle stock HP....you up the boost, they go BOOM!! If you are swapping a 5-speed in, you might as while pay a little more and get a 87-89 turbo tranny. The're pretty much bulletproof.0341TODD said:Dont listen to James man, turbo automatics are sweet! Youre always into boost and youll never smoke your tires when you launch! Before you do a boost controller though- make sure you get a new modulator for the tranny and do a filter and fluid change.......how many miles are on your car?