Reply to "Reverse gear - grinding noise"

...Check the Adjustment on the 'Back-Up Light' SWITCH.
If it is Screwed IN TOO FAR, You will have That Problem, because that prevents the Shift Rod, 'In the Gearbox', from moving as Far LEFT as it Needs To, in order to Engage Reverse, Smoothly! And You WILL 'Grind Gears!'. Yes! The Biggest Mistake some have made. is Assuming the Reverse Switch should be Screwed ALL the WAY IN!

Also, if the Gearbox is 'Coasting Down' from Another Gear, that will make it 'Grind', While Shifting into Reverse. With the Engine still running, Vehicle at a 'Stand-Still', with the Clutch DIS-engaged, try Engaging 1st or 2nd gear, Before trying to go into Reverse, to drag the gears to a stop, and THEN try engaging Reverse.

The way to adjust the Switch is, ofcourse, put the shifter into Reverse, don't forget to turn on the 'Key'....and Screw the switch in until the Back-Up Lights come On! But, then Move the Shift handle sideways (while still in reverse) and see if you can Make the Lights go OFF. They should stay on with the Shifter AT REST, with the Vehicle Backing Up! If they go off, that could be Dangerous for You!