Shifting problem

[Grabber523]

Sounds to me like either:

A. That's what it's supposed to do when the TQ is unlocked.

B. Your sh!t's broke, man.

Does the TQ lock and unlock based on load, or it it unlocked all the time? The rpm surge you see is the difference in input vs. output rpm of your converter, which is normal. At cruise it should be locked in 4th gear. If it is unlocked all the time, you have a problem. If it locks and unlocks while you're driving...then it's working fine. Have you checked your tire size and gear ratio? That will make it shift like @$$ if those are off the mark. Need more details, brother.