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bad vibrations
#88082 December 23rd 2003 8:58 pm
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stranger
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77 b-200 torqueflite,318,2" drop in front,stock height in rear,225-15-60 front,295-15-50 rear.the drive train is vibrating bad between 40-80mph has new u-joints. am considering 4"drop springs in front and 4" lowering blocks in the rear. maybe this will lower but level the pinion angle need an answer help

Re: bad vibrations
#88083 December 25th 2003 12:59 pm
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does it still vibrate when you let off the accellerator?

Re: bad vibrations
#88084 December 25th 2003 9:13 pm
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stranger
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no. it smooths out then. i have put front u-joints in it 4 times in a year

Re: bad vibrations
#88085 December 28th 2003 1:15 am
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journeyman
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journeyman
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Make sure your drive shaft is balanced....that could wear the front u joint and cause vibration.

Re: bad vibrations
#88086 December 28th 2003 6:53 am
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Hi guys, I've got a vibration problem to in my 77 dodge, when sitting still in park, engine ideling it runs great, give it gas to rev the motor, the whole van shakes like crazy, I know it's not the motor mounts, think it could not be running on all cylenders? Any help is needed, thanks.

Re: bad vibrations
#88087 December 28th 2003 11:26 am
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have you recently put tires on it?

Re: bad vibrations
#88088 December 28th 2003 11:27 am
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vanner 40 tune it up!!!!!!!!!

Re: bad vibrations
#88089 December 29th 2003 12:23 pm
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Madman!
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Greetings Glenn;

Did the vibration start when you dropped the front end? There should be a 15 degree difference in the drivesahft angle. If it is too straight or angled too far it will cause a vibration. If the driveshaft is ballanced, you may want to check the pinion bearing.if the pinion is moving it will also cause a vibration and can also cause u-joint wear.

Re: bad vibrations
#88090 December 29th 2003 2:01 pm
Joined: Dec 2003
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Vanner 40, You may have a bad torque converter. Lost its balance. Not knowing your van its also possible you slipped a tooth or 2 on your timing chain. The originals used a steel cog with nylon gears. It could also be bad high tension wires. Was it damp or raining when this happened? If you take the dog house off and run the van in the dark you can sometimes see the problem sparking from a wire or your dist. to ground. You might also want to check inside your dist. for carbon tracks. That would tell you its time to replace it, could be jumping inside. Also chech or listen for vacuum leaks, this could cause you vacuum advance from activating. Remember to work safe disconnect you batt. before elect work. Hope this helps. S.P.

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