i got a 2000 gmc jimmy with the 4.3 motor.it is an a4 but is it a 4l60e or a 65. and what kind of problems do they have and what modifaction can i do 2 it with out removing or dropping the pan??? what about using that trick shift trannny fluid??

 

It's a 4L60-E.

You want to modify the transmission without dropping the pan? ummm..... ????

 

isnt there servos i can change
??