[Avaric3]

how can i strengthen the 4r70w to handle 450rwhp+??

 

[SWEET2KSTANG]

stock will hold 450 for a long while as long as kept maintained. tuning for the trans will help, and maybe even a trans cooler if going to get abused. after that, its like building other transmissions.

 

[StangMod]

look into the j-mod overhaul. TCCoA Tech Articles

 

[Silverfoxbody]

I posted in the other thread on V6 forum.
The 4R is a great trans.