Author Topic: Clutch question  (Read 2901 times)

Offline Joe25da

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Clutch question
« on: May 31, 2015, 12:57:13 pm »
My 84 3500 has the sm465. Shifts fine, clutch catches great. Only issue is after I drive it, shut truck off the clutch is super stiff. I know these clutches are heavy, much more than my 6sp tacoma. I greased the pivot on frame. Once running it operates as normal

Offline Engineer

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Re: Clutch question
« Reply #1 on: May 31, 2015, 08:55:30 pm »
Sounds like the throwout bearing maybe binding on the input shaft collar.

The engine running probably causes just enough vibration/agitation/shaking for it to slide over the dry spots and thickend grease but causes it to bind up when not running.
2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout

Offline Joe25da

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Re: Clutch question
« Reply #2 on: May 31, 2015, 08:57:44 pm »
Sounds like the throwout bearing maybe binding on the input shaft collar.

The engine running probably causes just enough vibration/agitation/shaking for it to slide over the dry spots and thickend grease but causes it to bind up when not running.

That sounds more than reasonable. Any way to lube it without taking off trans/bell housing?

Offline Engineer

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Re: Clutch question
« Reply #3 on: May 31, 2015, 09:41:21 pm »
Might be able to go through the hole in the side of the bell where the fork comes out.

Use a really light coat of high temp grease like wheel bearing grease.

If you can manage to do it this way someone will have to hold down the clutch pedal while someone else applies the grease onto the input shaft bearing retainer behind the throwout bearing.
2002 Chevy 2500HD 4x4 8.1/ZF6sp RC/LB
2001 Chevy 2500HD 4x4 6.0/4L85E EC/SB
1997 Chevy Blazer 4x4
1994 Chevy K-2500 4x4 C6P 5.7/4L80E
1979 Chevy K-30 4x4 4sp 4.10
1977 Chevy K-30 4x4 4sp 4.10 454

Dad of an Eagle Scout, and a Life Scout