I have a 99 Bravada that just revs when shifting from 2 to 3. It SEEMS like it MIGHT be trying to catch as the RPMs increase but i'm not sure, so if it is trying to catch, it's barely doing it.
1-2 is fine as well as going back down to 2 from reving and from 2 back down to 1. It shifts manually from 1-2 but when putting it in D from 2, it immediatley revs.
Speedometer is working.
I have changed all 4 solenoids and put a new filter on and filled it back up.
The TCM fuse was blown and changed it but no difference. It has been giving problems activating the AWD and has a light illuminated for it so I assume something in the transfer motor or controller caused the blown fuse.
No check engine lights that I'm aware of but the battery died and I can't drive it far enough or long enough for it to run thru all the tests so no luck there.

I'd rather exhaust all self check possibilies before taking it to the shop and spending money on a diagnosis fee.