I need a little help troubleshooting. 97 Z with 6 speed. I have owned it for a little over a year. It's has always grinder into 5th and 6th. Drove it home from Vegas a few months ago and it started to get a very loud whine. Tranny is full of fluid. I need help trying to figure out if it's the differential going out or the transmission. When I drive it now, when I leave the line, it's like the parking brake is set and releases after I get it moving. Something is about to lock up!

Thanks for the help.

 

Did you check the fluid level in the diff?

 

That's todays project. Plus making room in garage for it.