I've got a 1990 Trans Am getting a 550 hp 408 and a 9 inch rear. I'm wondering which t-56 to use. I've heard that the ones from the 98 and up Camaro's and Firebird's are the strongest. Will this be able to handle this power and will I be able to run a 150 shot of giggle gas with this transmission? I'm not planning on hitting the track every day but I do plan on going once in a while just to play around, for the most part this car is my street toy.

 

The 98-02 has a different bellhousing (won't bolt to a standard sbc) and slave cylnder style.
94-97 bolts right up and I am pretty sure are the same strength.
You can upgrade the internals to the ones from the Viper to make the T56 even stronger.

 

I forgot to mention my engine I'm building is a Gen III iron block so the 98-02 LS1 style will bolt right up to my engine. That's my fault for not mentioning that.

 

The stock '98-'02 trans should hold up to the engine's power, but you'll be pushing it if you launch off the line with the nitrous.

 

I've been slowly tossing the idea of nitrous to the side anyway. Just to much hassle plus I won't really have any space to mount the bottle with the ideas I have. I'm putting a custom box in the back for 2 12's and on the hump over the gas tank is where the amp will be mounted. I think 550 horsepower is more than enough to have fun though, especially if I get an extra third member for the 9 inch with a spooled set of 5.11's for the strip.