What is the toughest automatic transmission that I could use with my 2005 srt 4 motor? The motor has lots of work done to it

 

Probably one from a PT GT, which also has a turbo 2.4L engine.

 

The toughest auto trans made is from darrel *** racing, that will handle anything you put to it, they use it in their red sled which is in the 8s I believe. Its expensive but you wouldn't have to worry about it, you'd break a pt trans with a built motor.

 

For $10 grand, it had better.