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09-05-2012, 08:16 PM
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#1 |
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Registered User
Join Date: Apr 2011
Location: Clifton, CO
Posts: 76
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I think I just broke something...
I was backing into my parking spot at home just now and something happened to the clutch when I pushed it in. The pedal now won't disengage the clutch. Nothing appears broken and all of the return springs are where they should be. It's an '83 so it's mechanical linkage. Any ideas? Is a broken clutch fork common or could it be a messed up throw out bearing? With the engine running the clutch doesn't make any unusual noise either with the pedal in or out. I'm stumped.
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09-05-2012, 08:29 PM
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#2 |
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Registered User
Join Date: Nov 2010
Location: Windsor Locks
Posts: 628
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Re: I think I just broke something...
Crawl underneath and look to see if ball end of the mech linkage has popped out of the clutch fork. It happened to me, the adjuster was worn and bent. Suprisingly the sm465 is pretty easy to speed shift.
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09-05-2012, 08:29 PM
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#3 |
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Registered User
Join Date: Jun 2011
Location: Baytown TX
Posts: 2,219
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Re: I think I just broke something...
Sound to me like the clutch broke, probably time for a new one.
__________________
John 82 Chevy Silverado 350ci/TH350 
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09-05-2012, 10:13 PM
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#4 |
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Registered User
Join Date: Jul 2007
Location: Tucson, AZ
Posts: 3,189
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Re: I think I just broke something...
Check the LMC catalog online for a good diagram of the mechanical clutch linkage, etc. x2 - crawl under the truck and see how you truck matches the diagram. I suppose it could be something simple like you lost the nut completely on the end of the adjustment rod, but you can see a lot just by looking around down there with a flashlight. I have an 83 SM465 and they are fairly simple -you can see everything mechanical easily under there.
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09-05-2012, 11:35 PM
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#5 |
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Registered User
Join Date: Oct 2011
Location: Tucson, AZ
Posts: 55
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Re: I think I just broke something...
I had a Honda that spit out a dampener spring and it got wedged between the flywheel and the clutch, effectively locking it together. The clutch pedal had no effect on it whatsoever.
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09-06-2012, 12:04 AM
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#6 |
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Registered User
Join Date: Apr 2011
Location: Clifton, CO
Posts: 76
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Re: I think I just broke something...
Everything underneath looks ok. The clutch fork isn't flopping around so it must still be on the pivot ball. The adjusting rod is still intact and in the correct position too so the problem must be inside the bell housing. I SO did not need this right now...
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09-06-2012, 12:12 AM
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#7 |
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Registered User
Join Date: Sep 2000
Location: Gold Bar, WA
Posts: 1,216
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Re: I think I just broke something...
Have you checked the z bar to see if the arms have "torn" from the welds?
__________________
My Projects: 1960 GMC 1/2ton with 305 V6 (daily driver) 1963 Chevy 1/2ton 2wd...converting to 4x4 1967 Suburban 1/2ton 2wd My Girlfriends Projects 1985 Chevy Suburban 3/4ton 4x4 with 6.2L diesel, 4" lift, converted to TH-400, Warn Premium manual hubs, & Wildcat 315/75/R16 tires. (daily driver) 1978 Camaro Type LT with a Marine 350 & vortec heads, Rochester Carb, & roller cam 1978 Camaro Z28 |
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09-06-2012, 07:34 AM
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#8 |
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Registered User
Join Date: Dec 2008
Location: Foristell, MO
Posts: 418
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Re: I think I just broke something...
check the end of the rod and pivot cup(?) to see if worn
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09-06-2012, 08:38 AM
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#9 |
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Registered User
Join Date: May 2011
Location: Bradford, PA
Posts: 395
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Re: I think I just broke something...
Check the Z-bar. Mine busted before.
__________________
1981
K10 Scottsdale305 ci | TH350 | NP208 | 60k miles |
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09-11-2012, 02:30 PM
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#10 |
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Registered User
Join Date: Jul 2012
Location: Redmond, Wa
Posts: 8
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Re: I think I just broke something...
sounds like it has a collapsed pressure plate.
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