If I try to put my standard shift truck in reverse while the motor is running it grinds so what gives?

Question

Also if I put it in reverse while the motor is off it goes in gear fine. So is this problem the clutch or the transmission?

Answer 1

Reverse probably doesn't have a synchronizer.

Try this little test. With the vehicle stopped, push in the clutch and put the stick into any forward gear. Keep the clutch in and then casually put it into reverse.

If it grinds, then your clutch is not releasing completely.

What's happening is friction is spinning the clutch disk. Then when you try to put it in reverse, the spinning disk is stopped by the reverse gears meshing.

For forward gears, the synchronizers match the speed of the disk to the gear. The synchronizers act like little clutches to slow down or speed up the clutch disk before allowing the gear to engage. There's a synchronizer for each forward gear.

But if the problem only happens when you are in neutral and then you step on the clutch and go directly into reverse, then you just have to put it in a forward gear before putting it in reverse.

Answer 2

Sounds like a clutch. The trans is not disengaging from the engine that's why it's grinding.

Answer 3

your fly wheel is sticking to your pressure plate if it sticks in other gears its a major problem try changing the trans filter then go from their

Answer 4

push ur clutch in all the way

i'd say its not ur trany, but ur clutch

good luck