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Old 04-18-2015, 07:02 PM   #1
E. Brower
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troubleshooting drivetrain shudder

68 C-20
292 straight 6
3 speed standard

The truck will shudder when coming from a dead stop, but ONLY when she is HOT.
Sometimes a little, sometimes ALOT.
The clutch is a fairly recent replacement, the rear wheel bearings are not that old, the U-joints and center support seem OK -- I'm stumped! Any ideas where to look?

Thanks in advance!
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Old 04-18-2015, 07:27 PM   #2
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Re: troubleshooting drivetrain shudder

Did you surface the flywheel when the clutch was put in?
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Old 04-18-2015, 11:15 PM   #3
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Re: troubleshooting drivetrain shudder

I will have to look at the service records regarding the flywheel-- The head gasket is leaking onto the bell housing -- I'm thinking this is the problem, but why only when hot? -- Thoughts anyone ?
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Old 04-18-2015, 11:19 PM   #4
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Re: troubleshooting drivetrain shudder

Warped flywheel?
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Old 04-18-2015, 11:31 PM   #5
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Re: troubleshooting drivetrain shudder

Could be...this is a high mileage, ex-farm truck --
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Old 04-19-2015, 12:17 AM   #6
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Re: troubleshooting drivetrain shudder

Head gasket leaking!
What??
Coolant??
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Old 04-19-2015, 10:10 AM   #7
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Re: troubleshooting drivetrain shudder

Sorry -- I meant the valve cover gasket -- oil getting onto the bell housing -- could be making it's way onto the clutch and flywheel?
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Old 04-19-2015, 10:42 AM   #8
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Re: troubleshooting drivetrain shudder

Quote:
Originally Posted by E. Brower View Post
Sorry -- I meant the valve cover gasket -- oil getting onto the bell housing -- could be making it's way onto the clutch and flywheel?
That'll do it!
I see a clutch job in your future!!
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Old 04-19-2015, 09:50 PM   #9
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Re: troubleshooting drivetrain shudder

Well, she needs a complete engine overhaul anyway, so it seems a clutch will be part of the plan -- thanks for your advice -- B.
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