4th gear whines pretty loud

thanks for your input pentastar69. The tranny was reportedly used but in good running condition. Apparently that was false. I mean it runs, but its got a pretty loud whining sound in 4th gear (and noticeable in 2nd too). I know its not the rear end because it was quiet with my other engine and manual 3 spd tranny that I just took out. Plus its nice and quiet in 1st or 3rd gear.

I'm not taking that thing out again though, I'm gonna pay a shop to fix it I think