Ok well ive come to realize my stock tranny in my denali sux **** so basicly i need to know what else in terms of aftermarket transmissions are ot there ? I have been thinking alot about boosting, but i know my stck trans an powertrain cant sustain much more power put throu it. so im wondering what are my options and if its a good idea ?

 

If you plan on boosting that truck I would definitely look into getting one of our level 5 4l65e extreme duty transmissions. We have trucks running them up to 600rwhp. I feel that after about 500-550rwhp, depending on the weight and use, a 4l80e is a good choice. There are many members of this board running our FLT transmissions that have been in your shoes. Maybe some will chime in. Keep us in mind when the time comes. Vince

 

What he said!! Skip all the BS and just go FLT Lv5!

 

Agreed! After 3 builds from a local shop and many upgraded hard parts, my brother's 02 Denali with only a cam and exhaust has ended up with a FLT4 or 5 (I can't remember which). It is currently holding strong.