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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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  #1  
Old December 29th, 2015, 10:36 PM
rusty66 rusty66 is offline
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Default Clutch Fork return spring replacement

I have a 1966 1/2 ton with an inline 6 and 3 on the tree. I was backing out of the garage when I heard a noise. I found a broken spring under the front drivers side. The spring was the clutch fork return spring. I went to NAPA and got a replacement that requires cutting and bending one end of the spring before use. I know where it attaches to the clutch fork but not where the other end should go.I have looked on line and on this forum for photos and info but haven't come up with anything showing this springs attach point. Any advice would be appreciated.
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  #2  
Old December 31st, 2015, 05:18 AM
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Funky61 Funky61 is offline
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Default Re: Clutch Fork return spring replacement

Rusty66, Does this help (from another forum)?
Attached Images
File Type: jpeg image.jpeg (88.0 KB, Multiple views, 26 clicks)
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  #3  
Old December 31st, 2015, 02:02 PM
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Default Re: Clutch Fork return spring replacement

Thanks Funky66,

That was exactly what I was looking for. I am going to work on this today.

Happy New Year!
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Old December 31st, 2015, 05:28 PM
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FetchMeAPepsi FetchMeAPepsi is offline
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Default Re: Clutch Fork return spring replacement

I had to rig a coathanger "extension" on mine because it wasn't the long necked type shown in this pic. It works great so far. Do you have a part number on that spring you got Rusty?
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Old December 31st, 2015, 06:04 PM
Culver Adams Culver Adams is offline
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Default Re: Clutch Fork return spring replacement

Here are photos showing clutch fork return spring on my 1961 GMC K1500.

Photo Dsc06307:
Clutch fork return spring on clutch fork behind clutch slave cylinder.
(From below: forward on truck is to right.)

Photo Dsc06315:
Clutch fork return spring to right of oil pan and clutch assembly.
(From below: looking to truck's right side: forward on truck is to left.)

Photo Dsc06318:
Clutch fork return spring above frame.
(From below: forward on truck is to right.)

Photo Dsc06319:
Clutch fork return spring hooked into frame hole to left of right front shock absorber.
(From right: forward on truck is to right.)

Photo Dsc06320:
Shows general area of clutch fork return spring hooked into frame (shown in Photo Dsc06319) (but clutch fork return spring is not shown).
(From right: forward on truck is to right.)

Hope this helps and Happy New Year.

Culver Adams
Minneapolis, MN
1961 GMC K1500 with 478 GMC V6
Attached Images
File Type: jpg Dsc06307-ClutchSlaveCyl-ClutchForkSpring.jpg (141.5 KB, Multiple views, 11 clicks)
File Type: jpg Dsc06315-OilPan-ClutchAssy-ClutchForkSpring.jpg (150.5 KB, Multiple views, 8 clicks)
File Type: jpg Dsc06318-Rt-Ft-Frame-ClutchForkSpring.jpg (84.4 KB, Multiple views, 8 clicks)
File Type: jpg Dsc06319-Rt-Ft-Frame-Shock-ClutchForkSpring.jpg (114.7 KB, Multiple views, 7 clicks)
File Type: jpg Dsc06320-Rt-Ft-AxleSpring-Shock.jpg (106.7 KB, Multiple views, 9 clicks)
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Old December 31st, 2015, 06:14 PM
Culver Adams Culver Adams is offline
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Default Re: Clutch Fork return spring replacement

Hi Rusty,

I just saw Funky61's reply and realize you have a mechanical clutch linkage on the left side. Perhaps photos I attached to my earlier reply will be of use when you drop in a GMC V6 with hydraulic clutch linkage on the right side. :=)

Regards and Happy Newyear

Culver Adams
Minneapolis MN
1961 GMC K1500 with 478 GMC V6
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Old December 31st, 2015, 08:36 PM
rusty66 rusty66 is offline
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Default Re: Clutch Fork return spring replacement

I would like to have a GMC V6 in my truck, but that will have to wait awhile. I did get the spring on and I think it is working okay. Drove around the block without issue. The NAPA number on the spring is NOE 6151100. Thanks for the help from all you gentlemen.
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Old December 31st, 2015, 08:42 PM
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Default Re: Clutch Fork return spring replacement

Quote:
Originally Posted by rusty66 View Post
I would like to have a GMC V6 in my truck, but that will have to wait awhile. I did get the spring on and I think it is working okay. Drove around the block without issue. The NAPA number on the spring is NOE 6151100. Thanks for the help from all you gentlemen.
Not to contradict a previous answer, but with a '66 you won't have to worry about the hydraulic linkage if you drop in a 305. You will possibly need a different mechanical linkage (because I am not 100% certain about differences between inline and v6) because the 1966, and as I recall the 64-66 models, has a mechanical linkage for the clutch. Only the earlier ones have hydraulic clutch assemblies.
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Old December 31st, 2015, 09:13 PM
Culver Adams Culver Adams is offline
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Smile Re: Clutch Fork return spring replacement

[QUOTE=David R Leifheit;60368]Not to contradict a previous answer, but with a '66 you won't have to worry about the hydraulic linkage if you drop in a 305... [/PARTIAL QUOTE]

Thanks, David, for the clarification: I should have remembered 305 GMC V6's have mechanical clutch linkage on the left side. (I'm looking forward to the new year and the new brain cells that come with it.) :=)

Culver Adams
Minneapolis, MN
1961 GMC K1500 with 478 GMC V6
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