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1961 - 1966 F-100 & Larger F-Series Trucks Discuss the Slick Sixties Ford Truck

Clutch shudder

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Old Jul 31, 2022 | 12:49 PM
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From: Webster
Clutch shudder

After replacing the clutch, pressure plate and resurfacing the flywheel in my 1961 F100 I believe the clutch shudder is a little worse than before I started this process. You can see the driveshaft isn’t turning smoothly when the clutch is engaged. After reviewing old posts on the topic it sounds like spring bushings might be the next? What say the experts?
 
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Old Jul 31, 2022 | 03:39 PM
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When you did the clutch swap how sure are you you did not get any grease on the clutch disc / pressure plate / flywheel?
Motor & transmission mounts is what I would change out first.
Bad mounts would let the motor / trans move around when they should not.
Dave ----
 
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Old Jul 31, 2022 | 05:25 PM
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Something to also look at.

I have an issue where the clutch is jerky starting from a stop. Figured it out, my cab is flexing up and down just a bit and causes the clutch pedal levers to move even though my foot is not moving.

As mentioned, check your engine and trans mounts. Replaced them all and it helped the jerky issue a bit. Still need to fix the cab. That will probably be for the next owner when I'm long gone.

Tom
 
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Old Jul 31, 2022 | 05:31 PM
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Not familiar with the 61 F100 trans and clutch assembly, however over the past 45 plus years replaced the clutch on my 65 F100 more often than I want to admit. I always replace the throw-out bearing and may change the pilot bearing if there is an issue beforehand? If the throw-out bearing has a zerk (grease fitting) suggest attempt to lubricate before trying other options.Anyhow, food for thought?
 
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Old Jul 31, 2022 | 06:48 PM
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This will propbly bring replies but just because the parts are new doesn't mean they are true! It is easier than it used to be to get iffy parts. You can keep changing stuff or live with. If it is a case of parts not aligned perfectly, it should get better with time, as they wear into one another. I have heard of folks putting a vehicle up against a tree or something strong and slipping the clutch a bit to speed the wear in process. Now I know that all sounds crude and some folks don't abide with all that kind of talk, but it could indeed be the solution. Of course, as mentioned above, you can't have any loose mounts or even U bolts so make sure that stuff is all good.
 
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Old Jul 31, 2022 | 06:53 PM
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Dave, we took all precautions we could to insure they were clean. All three motor mounts have been replaced.
 
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Old Jul 31, 2022 | 06:55 PM
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From: Webster
Tom, how in the world did you figure that out?
 
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Old Jul 31, 2022 | 06:57 PM
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From: Webster
Forgot to mention the throw out bearing is new also
 
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Old Jul 31, 2022 | 09:53 PM
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My floor is rusty and the front mounts rusted out. Had to replace the front cab mounts with channel iron many many moons ago. After replacing a clutch set twice in the first 5 or so years of the 40 years I owned it to fix the issue. I figured out that the cab was flexing as the clutch plates engaged.

I should have grabbed a hydo clutch setup off a truck when I saw it in a junk yard. That would have solved my issue. But at the time, I thought it would be a pain to keep up on it.

I learned how to work the clutch and throttle to reduce or eliminate the issue. But then again, if I wanted to start in first (granny gear) it is fine. I always start in second.

Tom
 
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