ZF5 overdrive noises
 

I have the zf5 5 speed in my truck and since i've owned it, the transmission makes grinding noises in 1st(L) and 2nd gear, but recently it started making a whining noise only in overdrive and its driving me nuts. some dummy didnt put the inspection plate back on when they did a clutch long before I owned this truck, and I cannot find a replacement inspection plate (no local junkyards) this concerns me.... any ideas??

cool, thanks for the input guys

I'll give this a bump for ya since I don't know about manual tranny problems.