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Discussion Starter · #1 ·
i cant figure out why my trans almost always grinds into reverse. some times it wont. but most of the time it does. and when it does its always a bitch getting the car into first or second. i tried aligning the linkage. didnt change anything. think i should try again maybe i messed up time to rebuild the linkage, or can it be something else?
 

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i cant figure out why my trans almost always grinds into reverse.
The clutch.

It isn't fully disengaging for whatever reason.
It could be a faulty cable, it could be contaminated clutch parts, it could be physical damage to the clutch parts, but your clutch isn't disengaging when you depress the pedal.

Reverse only grinds on selection when one of the 2 shafts in the trans are spinning.
The output shaft only spins when the car rolls... so if the tires aren't moving then the output shaft isn't either. This means if the car is stopped, it isn't the output shaft.

That only leaves the input shaft, which is controlled solely by the clutch. If the input shaft is spinning, (and we know it is because reverse grinds on selection), then the clutch is at fault.

You're looking for a clutch problem, and that will take care of the reverse grind, as well as the difficulty shifting into the forward gears.

The forward gears use sync rings to match shaft speeds, so they will use friction to fight the dragging clutch until you can select the gear. Reverse has no sync ring, and isn't a syncromesh gear, so you are actually sliding a gear into another gear, and if any one of them aren't completely stopped, you get a grinding noise.

Thus, if reverse grinds and the car isn't in motion, then the clutch is not disengaging for some reason.:)
 

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Discussion Starter · #3 ·
thank you for explaining all that. actually really helpful. im going to replace the cable cause i wanted to any way cause its looking old, and im changing the trans fluid cause i have a leak from around the speedo cable.

but my only question is it being a coming and going problem. like today....... only grinded once when i pulled into a friends house. but when i backed up my driveway nothing. would it pint more to a simple replacement of my clutch cable or something inside my trans.
 

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My initial guess would be you have the auto adjusting cable, and it is slipping or binding at times (slipping) and not pulling the release arm up fully, which leaves the clutch partially engaged and keeps the input shaft spinning.

When they fail (the auto cables) they tend to act up a bit at first and get worse with time.

The manual adjust cable is cheaper and more reliable:thumbup:

If it isn't the cable, it may be contamination or damage at the clutch parts.
 
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