My transmission is acting a bit oddly. I seem to be getting some slip in the transmission during shifts when I am applying 50%+ throttle. At low speeds it won't slip, nor does it have any problem shifting in any other gears at any other speed. If I apply full throttle for a passing maneuver it will occasionally do the same thing.
So do you think I need a rebuild, or does it sound electrical? I just had the transmission fluid changed a few weeks ago which didn't make an appreciable difference.
Thanks for the input!

Pics for clicks!

 

No advice/recommendations?
Alright then...

 

Transmission problems are very hard to diagnose over the internet. There are some obvious problems that seem to crop up on the 4L60E, but slipping is generally caused by a lack of line pressure. Without knowing the actual line pressure you have, no one can really help. You need to get it to a mechanic familiar with the 4L60E transmission and its diagnosis.

 

Excellent. I appreciate your reply.
I just wanted to get some troubleshooting ideas before taking it to the very expensive tech.
Thanks!