HELP...4L60e not shifting correctly...

[aggie91]

I don't believe the 3-4 cluthes are burnt at this time. It shifts hard into 3rd and 4th when accelerating at 1/2 or more throttle.

After talking with the guy that did the programming for us, we think that a seal might be messed up when the shift kit was installed or the servo was not put in correctly. This would let fluid by at low throttle and not build enough pressure to complete the 3rd gear shift. But under hard acceleration there is enough pressure to shift into 3rd and 4th. We are taking it to the shop that did the shift kit and servo on Monday to have him look it over. We will see what it looks like....