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Old 07-21-2020, 09:09 AM   #1
jerry shook
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Default vibrates when backing up

i have 60 hp flat head in my car an when starting to back up it ishakes bad. smooth in 1st. any suggestions is appreciated.
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Old 07-21-2020, 10:59 AM   #2
drolston
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Default Re: vibrates when backing up

Check for deteriorated motor and transmission mounts.
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Old 07-21-2020, 11:00 AM   #3
KGS
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Default Re: vibrates when backing up

Check your transmission mount and motor mounts.

As a General rule, vibrating, shaking when backing
up indicates a bad or loose transmission mount.

Vibrating, shaking when starting out in 1st gear indicates
bad or loose motor mounts.

Ken
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Old 07-21-2020, 12:03 PM   #4
solidaxle
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Default Re: vibrates when backing up

Vanpeltsales site go to clutch chatter.


http://www.vanpeltsales.com/FH_web/f...oubleshoot.htm


I had a multiple problems with mine. wrong washer holding the universal joint tight to the tranny tailshaft. It caused the bolt to loosen up and the U-joint would smash against the bearing retainer.
Worn c-clips in the tranny.
Oil on the clutch.
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Old 07-21-2020, 03:38 PM   #5
rotorwrench
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Default Re: vibrates when backing up

Clutch chatter could be the culprit for sure. When in reverse, the rear axle is pulling on the drive line instead of pushing. This puts things in the opposite bind that they're in normally in forward gears. Loose mounts can cause problems in both forward and reverse but may be masked by adjustments to take up the slack. There could also be something going on with the reverse idler gear but that would be an uncommon thing.
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Old 07-21-2020, 03:56 PM   #6
Mart
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Default Re: vibrates when backing up

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What year car is it? Not that that in itself is important, but does it have anti-chatter rods fitted? Are they tight?

Mart.
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