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Transmissions and Rear Ends Three on the tree or four in the floor? Shift it all here.

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  #11  
Old February 17th, 2023, 02:04 AM
JoelNC JoelNC is offline
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Default Re: 64 305E Clutch Not Engaging

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Originally Posted by Funky61 View Post

Ordered it!


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  #12  
Old February 20th, 2023, 10:12 AM
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AZKen AZKen is offline
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Default Re: 64 305E Clutch Not Engaging

1. 64 has mechanical Z bar clutch mechanism.

2. The rods have been swapped. Hooked rod goes from pedal to Z bar. The other is the Z bar to fork rod.

SEE THIS LINK
https://www.lmctruck.com/1960-66-che...clutch-linkage

Last edited by AZKen; February 20th, 2023 at 10:46 AM.
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  #13  
Old February 20th, 2023, 04:55 PM
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Default Re: 64 305E Clutch Not Engaging

There seem to be a couple different bell cranks used for Chevy V8, L6, 4x4 but, the GMC V6 is unique per this link.

It's a great read.

http://www.67-72chevytrucks.com/vboa...tures66+gmc+v6

I think JoelNC has the unit set up correctly minus the missing wedge.
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  #14  
Old February 20th, 2023, 09:14 PM
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AZKen AZKen is offline
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Default Re: 64 305E Clutch Not Engaging

The linked post #37 seems to show what the LMC link shows.
JOEL: To answer your question, I believe you do have the linkage backwards. That post shows a 1964 305. It seems to have a different Z bar mounting bracket. There is a whole bunch of confusing stuff in that thread and elsewhere. Swap your rods and see what happens.

Last edited by AZKen; February 20th, 2023 at 10:47 PM.
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  #15  
Old February 21st, 2023, 02:47 PM
JoelNC JoelNC is offline
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Default Re: 64 305E Clutch Not Engaging

Thanks so much for the reponses! The wedge is showing up today and I'll get the linkage swapped around and hopefully be on the road!
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  #16  
Old February 22nd, 2023, 03:04 PM
JoelNC JoelNC is offline
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Default Re: 64 305E Clutch Not Engaging

Quote:
Originally Posted by Funky61 View Post
There seem to be a couple different bell cranks used for Chevy V8, L6, 4x4 but, the GMC V6 is unique per this link.

It's a great read.

http://www.67-72chevytrucks.com/vboa...tures66+gmc+v6

I think JoelNC has the unit set up correctly minus the missing wedge.
I think you're right. I think I'm just missing the wedge. The link you provided shows that the GMC V6 setup is completely different from any of the Chevy or GMC L6 setups. My setup pushes the clutch fork, rather than pulling the clutch fork. The LMC diagram is different than what I have.

Last edited by JoelNC; February 22nd, 2023 at 03:11 PM.
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  #17  
Old February 24th, 2023, 03:20 AM
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Default Re: 64 305E Clutch Not Engaging

I don't know of any GM clutch forks that are pulled. Can you post one?

Last edited by AZKen; February 24th, 2023 at 03:43 AM.
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  #18  
Old February 24th, 2023, 04:22 PM
JoelNC JoelNC is offline
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Default Re: 64 305E Clutch Not Engaging

Quote:
Originally Posted by AZKen View Post
I don't know of any GM clutch forks that are pulled. Can you post one?
Sorry, I wasn't clear. It appears from the diagram here https://www.lmctruck.com/1960-66-che...clutch-linkage, when you press the clutch pedal, the z-bar is pulled up which pushes the clutch fork.

On my setup, when I press the clutch pedal, my z-bar is pushed down, which pushes my clutch fork.

There's a good comparison between the two setups here: http://www.67-72chevytrucks.com/vboa...tures66+gmc+v6.
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  #19  
Old February 28th, 2023, 04:25 PM
therevrolls therevrolls is offline
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Default Re: 64 305E Clutch Not Engaging

It seems like you likely have this figured out, but I thought I would just ask that you are sure this clutch is correct. In this other thread:

https://6066gmcclub.com/showthread.php?t=47796&page=4

A lot of people were having trouble with the collar being backwards and the spline protruding on the opposite side from the stock clutch. Sometimes people were installing them backwards by accident because of this. Did you have that problem at all? I have been looking for a clutch for my 65 and was only looking for the Rhinopac 04-528 because it sounded like that was the only one that didnít have that problem and actually fit.

Iím just wondering what this was like for you, because if it all works and lines up then I have a solution for my own problem, but it also might be contributing to your troubles if it was not something you had been aware of.

Let me know how it all fit together for you.
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  #20  
Old March 1st, 2023, 05:29 PM
JoelNC JoelNC is offline
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Default Re: 64 305E Clutch Not Engaging

Quote:
Originally Posted by therevrolls View Post
It seems like you likely have this figured out, but I thought I would just ask that you are sure this clutch is correct. In this other thread:

https://6066gmcclub.com/showthread.php?t=47796&page=4

A lot of people were having trouble with the collar being backwards and the spline protruding on the opposite side from the stock clutch. Sometimes people were installing them backwards by accident because of this. Did you have that problem at all? I have been looking for a clutch for my 65 and was only looking for the Rhinopac 04-528 because it sounded like that was the only one that didnít have that problem and actually fit.

Iím just wondering what this was like for you, because if it all works and lines up then I have a solution for my own problem, but it also might be contributing to your troubles if it was not something you had been aware of.

Let me know how it all fit together for you.
I may have the wrong clutch in there. I've found some little things that were off, like the z-bar was a little bit out of where it needed to be, and the clutch fork ball stud was a little bent, but I think it may be the issue in the thread you shared.

I'm going to mail my original clutch to the Brake & Clutch Supply in Bruceville, TX (254-752-4307). He says he's refaced a number of clutches for these GMC V6's. We'll see how it goes!

Thanks for responding!
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