Hey fellas I have a 89 trans am I bought a vortec engine from a 99 tahoe will a T5 or T56 blt up to it? And which trans is better? Can the T5 be built up or is the T56 better all around thanks in advance

 

The Vortec engine is great, the t56 is good up to 450 horsepower stock, while the t5 is only rated at 300 HP stock. T56 also has an extra overdrive which will help out with your gas mileage. There are several threads if you do a search, of everything you need to swap to a t56 and the prices of those parts new.

Now I could be wrong, but from my understanding you do not need a new centerforce flywheel with the Vortec/86+ block because they are a 1-piece rear main seal. Could someone confirm this?

 

Could I build the T5 up or it still wouldn't compare to the T56? Would there be any mods that were needed for one vs the other

 

If you go with a t-56 your going to need new set of gears, 3.7x work well I find and you will also need a new crossmember.

With a t-5 you could upgrade it to the max with parts from G-Force, price would probably work out the same in the end though and not sure how much stronger it would be compared to the t-56 tranny.

 

getting all stuff tohether for 6 spd swap on my tpi powered car what do the parts list look like that I need?

 

https://www.thirdgen.org/forums/tran...after-t56.html
^(motivation?)

https://www.thirdgen.org/forums/faq-...questions.html

https://www.thirdgen.org/forums/tran...ap-thread.html

https://www.thirdgen.org/forums/tran...-overview.html
^(parts list) but you don't need the flywheel because you have the vortec block.

 

What's involved coming from a t5 already to a LT1 style T56. I have searched, but haven't found an exact thread for my situation...