Gear Crunch

[ke70dave]

this actually increases the problem. Ke70Dave has got it right.

Reasoning: Releasing the clutch in neutral spins the input and lay shaft(or the primary shaft on FWD's). the reverse idler moves into mesh between the lay shaft and the output shaft(or primary and secondary on fwd's), if the lay or primary shaft is still spinning(due to a recently released clutch or dragging clutch)then the reverse idler will crunch when engaged.

 

etc....etc....

 

 

very interesting benno, thanks for taking the time to explain that. makes perfect sense.

[andys-corolla]

well thought i let you guys know that i been putting my car in first then revers and so far no crunch so i just wanna say thank you guys

[altezzaclub]

You'd have to make sure its not clutch drag from the clutch not releasing properly. If you wait 5seconds with the clutch held down, does it still crunch?? If it doesn't its just residualy spin in the layshaft, but if it does its clutch drag.

 

I assume they're hydraulic, and if either cylinder is not holding pressure properly they will not pull the pressure plate right off the clutch plate so it will keep the gearbox spinning a little. As first is a synchro gear you won't notice a little clutch drag, but reverse is straigh-cut and it crunches easily.

 

I can't think of any car of the many I've owned that crunched into reverse unless there was a problem with the clutch... Another one was lack of grease on the splines at the clutch plate- it stopped the clutch freeing completely on an old Skyline I had.

[andys-corolla]

You'd have to make sure its not clutch drag from the clutch not releasing properly. If you wait 5seconds with the clutch held down, does it still crunch?? If it doesn't its just residualy spin in the layshaft, but if it does its clutch drag.

 

I assume they're hydraulic, and if either cylinder is not holding pressure properly they will not pull the pressure plate right off the clutch plate so it will keep the gearbox spinning a little. As first is a synchro gear you won't notice a little clutch drag, but reverse is straigh-cut and it crunches easily.

 

I can't think of any car of the many I've owned that crunched into reverse unless there was a problem with the clutch... Another one was lack of grease on the splines at the clutch plate- it stopped the clutch freeing completely on an old Skyline I had.

 

 

i try hold the clutch tomorrow morning when i wake up and see if it does it but the other way work fine