Cant get Munice in gear/Clutch disengagement - Chevelle Tech
Transmission & Driveline Transmissions and Differentials

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post #1 of 29 (permalink) Old Feb 11th, 17, 9:41 PM Thread Starter
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Cant get Munice in gear/Clutch disengagement

Got a M20 that has been rebuilt and has about 10,000 miles on at most. Car had been running fine and was time to back off the clutch as it was getting tight. This is my Dads car I think he let it go a little long before asking me to back the clutch off.

I shorten the rod and it seemed to not of helped so I put it back where it was and now the car will only go in gear with the car off. If you crank it will not go in gear.

Is the clutch simply not disengaging and needs to be backed off 5 to 6 turns at least?

Could the clutch be burnt up?

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #2 of 29 (permalink) Old Feb 11th, 17, 10:14 PM
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Re: Cant get Munice in gear/Clutch disengagement

You mean you made the rod LONGER to get it to disengage more right? How much free play do you have right now? Jim

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post #3 of 29 (permalink) Old Feb 11th, 17, 10:17 PM Thread Starter
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Re: Cant get Munice in gear/Clutch disengagement

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Originally Posted by Jim Mac View Post
You mean you made the rod LONGER to get it to disengage more right? How much free play do you have right now? Jim
Yes, I back out the rod and shorten it. I may of been mistaken earlier in thinking that shortening the rod would help with disengagement. I never had this kind of issue on my car.

Im not sure what the free play is right now. It will not go into gear when the engine is running. Have to place it in gear with the car off.

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #4 of 29 (permalink) Old Feb 11th, 17, 10:29 PM
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Re: Cant get Munice in gear/Clutch disengagement

Pilot bushing piled up maybe.

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post #5 of 29 (permalink) Old Feb 11th, 17, 10:32 PM Thread Starter
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Re: Cant get Munice in gear/Clutch disengagement

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Pilot bushing piled up maybe.
Levon, what does that mean?

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #6 of 29 (permalink) Old Feb 11th, 17, 10:43 PM
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Re: Cant get Munice in gear/Clutch disengagement

The snout on the front of the transmission resides in a bushing in the crankshaft when the trans is installed. If the bushing piles up or is made of non brass they attach to the trans snout and prevent it from stopping when the clutch is disengaged (pedal depressed). This prevents the transmission from engaging in any gear as it is all rotating and not allowing engagement until the car engine is shut off.

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Current Engine VortecPro 460 (513 HP) Original is resting
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post #7 of 29 (permalink) Old Feb 11th, 17, 10:48 PM Thread Starter
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Re: Cant get Munice in gear/Clutch disengagement

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Originally Posted by LevonH View Post
The snout on the front of the transmission resides in a bushing in the crankshaft when the trans is installed. If the bushing piles up or is made of non brass they attach to the trans snout and prevent it from stopping when the clutch is disengaged (pedal depressed). This prevents the transmission from engaging in any gear as it is all rotating and not allowing engagement until the car engine is shut off.
It has a NAPA brass pilot bushing. Was working fine, till I tried to adjust for a heavy and hard pedal. It was engaging almost at the top of the clutch pedal travel.

Could something of changed?

Could of something caused the bushing to pile up as you say?

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #8 of 29 (permalink) Old Feb 11th, 17, 11:26 PM
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Re: Cant get Munice in gear/Clutch disengagement

The bushing's can be made of brass with steel. You need to test them with a magnet.
You may also have a bad clutch with a bent finger or diaphragm????

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post #9 of 29 (permalink) Old Feb 11th, 17, 11:29 PM Thread Starter
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Re: Cant get Munice in gear/Clutch disengagement

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The bushing's can be made of brass with steel. You need to test them with a magnet.
You may also have a bad clutch with a bent finger or diaphragm????
Im pretty sure its solid brass. I guess I will have to test it when the tranny comes out. Im hoping it was something else.

Im thinking the bushing is ok and its a bad clutch....

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #10 of 29 (permalink) Old Feb 11th, 17, 11:30 PM
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Re: Cant get Munice in gear/Clutch disengagement

Was the clutch set-up a new unit or rebuilt. You should have to lengthen the rod not shorten it.

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post #11 of 29 (permalink) Old Feb 11th, 17, 11:33 PM Thread Starter
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Re: Cant get Munice in gear/Clutch disengagement

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Was the clutch set-up a new unit or rebuilt. You should have to lengthen the rod not shorten it.
It was a brand new clutch about 6,000 miles ago.

Lengthen the rod? As in turning the rod to the left? I was thinking to shorten it...if it started to get to tight.

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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post #12 of 29 (permalink) Old Feb 12th, 17, 12:46 AM
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Re: Cant get Munice in gear/Clutch disengagement

I think you are getting your wires crossed. You will need to make the rod longer thus reducing the amount of free play. If you shorten it you will have too much free play and you won't have enough travel to disengage the clutch.
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post #13 of 29 (permalink) Old Feb 12th, 17, 2:01 AM
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Re: Cant get Munice in gear/Clutch disengagement

Yes, you want to lengthen the rod that goes between the Z-bar and clutch fork. If you shorten it the pedal would have to travel further just to make the throw out bearing contact the clutch fingers and there will not be enough distance left to release the clutch fully even though the pedal is to the floor.

71 Malibu, 396BBC, 4 speed, 12 bolt.
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post #14 of 29 (permalink) Old Feb 12th, 17, 5:15 AM
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Re: Cant get Munice in gear/Clutch disengagement

Sounds like you might have been "thinking to much".
The clutch wears with use thus the need for a longer rod to make all work properly.
Sometimes we need to stand on our heads to see what is wrong, a different perspective so to say.

Good luck.
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post #15 of 29 (permalink) Old Feb 12th, 17, 8:45 AM Thread Starter
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Re: Cant get Munice in gear/Clutch disengagement

Ok fellas thanks for the information and guidance. I think based on this that the linkage may just be out of whack causing it not to go in gear. I will lengthen the rod to try and get it to go in gear.

This leads me back to where I was start with. What is causing the car to grind when trying to get into reverse? I was thinking improper clutch adjustment. Sometimes going to a forward gear then to reverse helps, but not always.

67 chevelle malibu / SS/ custom

Currently undergoing a metal work to remove all rust, if I ever get there.

Cant decide on prostreet or cruiser with a 4 speed.
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