I recently had the ring and pinion changed in my '04 screw tranny, for the second time, and noticed that when i hit OD it drops down seriously in the RPMs. At 60 I might be pulling 1400 RPMs and the tranny sounds deep and rough, like it's under powered. It happened the first time the day after the changeout. I took it in and they told me they had not reset the PC and it ran great for about 50 miles. Then is dropped off again. Now when I take it in they tell me it's in spec. When I accelerate it is very sluggish unless I hit it hard enough to drop out of OD. I am convinced it's not right. Any insight?

 

Hear is what I would do.
Firmly request them to go with you on a road test and show them what it does.
Then ask firmly if they would want there truck to shift that way?
When doing a job,,,,,,,,,,do the whole job and not just half a job.
If they don't know, then admitt it and find out what it takes to clear the problem! especially if you paid for the job already.

 

from what gear to what gear did you go to?

...zap!

 

I have asked that they go with me on a ride...they won't. I'm more than a little sceptical. None the less, my problem continues to exist. The problem is only in OD. All other gears are fine.