« Last post by Stingr69 on May 01, 2016, 09:57:17 PM »
The shifter linkage adjustment is frequently mentioned, but seldom the cause. Worth a check.
The clutch is adjusted properly with 1" of free play measured with a tape measure at the pedal pad against light finger pressure. Make sure there is no lost motion in the clutch linkage. If you still get grinding with the right clutch adjustment, the clutch is not fully releasing. That causes the gears to continue to rotate and clash going into reverse. Try going into a forward gear first to stop the rotation and then try to go into reverse. Might help, but not solve the problem.
If the installer hung the weight of the transmission on the disk while trying to install the transmission, you could have bent the disk. disk can't release fully and it grinds going into reverse.
Usually this is the cause - pressure plate can be warped and cause this grinding symptom. Defective pressure plate or heat related damage from clutch linkage adjustment being too tight. Tight clutch adjustment allows clutch slippage, which causes heat, which then warps the pressure plate, and the disk can't release anymore - you get grinding.
Replace clutch with a stock replacement LUK brand and be done with it.