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Old 02-25-2008, 08:36 PM
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Whole car shakes?

I have a stock 65 Plymouth Belvedere, 273 v8 automatic transmission. When I accelerate the car from 10mph to 40mph, the whole car shakes. The second you let off the accelerator the shaking stops. Or, once I get above 40mph the shaking stops. I checked the engine and transmission mounts for quality and tightness but found nothing. It just started doing this all of a sudden. Don't sense any problems with wheel balance or alignment. Anyone have an idea what the problem might be?

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Old 02-25-2008, 08:59 PM
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Shaking

You're whipping up on this 43 year old Mopar? The friggin' thing is probably going into shock. Better stay near the Craftsman defilibrators because the relative bearing is picking up some negative waves.

Seriously, don't stop looking at the engine compartment, check the crossmember and surrounding frame, trans mount, leaf spring mounts, spring perches and trunk floor area around the rear shackles. Don't be afraid to stick a pry bar in and around those areas. I had a crossmember fall out of my 66 396 Caprice with part of the frame attached. Good ole' Pennsylvania salt.
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Old 02-25-2008, 09:11 PM
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Quote:
Originally Posted by HotRodMan
I have a stock 65 Plymouth Belvedere, 273 v8 automatic transmission. When I accelerate the car from 10mph to 40mph, the whole car shakes. The second you let off the accelerator the shaking stops. Or, once I get above 40mph the shaking stops. I checked the engine and transmission mounts for quality and tightness but found nothing. It just started doing this all of a sudden. Don't sense any problems with wheel balance or alignment. Anyone have an idea what the problem might be?
check the u-joints

sam-missle
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Old 02-25-2008, 09:36 PM
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Quote:
Originally Posted by sam-missle
check the u-joints

sam-missle

Yep, my first thought too.
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Old 02-26-2008, 06:03 AM
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Check the distributor cap. Make sure your plug wires are good. Check the points and condenser. Make sure the dwell and timing are correct.
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Old 02-26-2008, 06:33 AM
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I had a pickup that did that and i replaced the motor mounts and trans mount and it stopped. The trans mount was bad but couldnt see the it was bad with it in the truck. Was soft and had split in the rubber towards the front where it fits close to trans and couldnt see the split.
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Old 02-26-2008, 07:19 AM
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Quote:
Originally Posted by sam-missle
check the u-joints sam-missle
I agree. Sounds just like a u-joint problem...
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