1993 Plymouth Voyager Engine shakes

Tiny
DENNISGRAHAM4
  • MEMBER
  • 1993 PLYMOUTH VOYAGER
  • 122,000 MILES
Engine moves side to side on take off and all gears shaking car apart checked all motor mounts they are good tires are new when letting off the gas and just cruising no vibration raised car off ground ran car in gear with foot on brake to make a load on motor and watched motor move about one inch side to side
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Friday, September 20th, 2013 AT 9:55 PM

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Tiny
CARADIODOC
  • EXPERT
You really need to put some punctuation in that huge sentence, otherwise it can be read a lot of different ways. I DID understand the moving engine. Suspect a worn inner cv joint housing. 99 percent of the time it will be the right inner joint but I have had a few bad left ones. If you want to disassemble it to inspect it, I can tell you how to do that, but most people just install a rebuilt half shaft. They're so low in cost now that a new cv joint, or even just the outer housing from the dealer is much more expensive.

There's two things to be aware of if you aren't already. First, be sure the front end is jacked up and there is no vehicle weight on the wheel bearing at any time when you have the axle nut loosened or removed. Some people use the vehicle's weight to keep the wheel from turning when they loosen or tighten that nut. Doing so will instantly make the wheel bearing noisy. Also be sure to use a click-type torque wrench on that axle nut. As I recall, the torque spec is 180 foot pounds but there will be a sheet that comes with the new parts that will list that number.

Second, once the axle nut is removed, you should be able to push the outer cv joint in toward the transmission about a half inch, then it will pop back out under hard spring pressure. If it pushes in real easily and doesn't spring back out, that internal spring in the inner joint is broken. It used to cost three dollars from the dealer. When it breaks there is usually already some wear in the housing but it is possible a new spring is all that's needed.
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Saturday, September 21st, 2013 AT 12:21 AM
Tiny
CARADIODOC
  • EXPERT
One more comment of value. I never thought of running the drive train on a hoist like you did, but that gave me an idea. Jack the front end up and remove the two wheels, then stick a punch or screwdriver into one of the cooling slots in the brake rotor on one side to lock it up, then try your procedure again. If the shaking stops, you have the half shaft with the problem locked up. If the shaking is still there, it's due to the shaft that's spinning.

You should be feeling a shimmy in the steering wheel too.
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Saturday, September 21st, 2013 AT 12:27 AM

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