jimmyg

Ok pressure is as follows
At idle
Park 65
Drive 120
Reverse 100
With foot on throttle and gas
D 170
R 215

Are these acceptable pressures? I'm trying to calibrate shifting with tci ez tcu and am having trouble . Soliniods checked out so now I'm checking line pressure . Want to help me diagnose?

mrvedit

I don't know enough about the 4L80E to fully evaluate those numbers, but when you blip the throttle the pressure should go over 200.

Who know what it should be?

jimmyg

According to extreme automatics.com at idle, p,d,n, should be 40-70 and with throttle pressed to the floor should be 160-180. Reverse should be 60-70 at idle and300-330 at full throttle. So it would seem I have low reverse pressure . What does this effect?