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Old 11-09-2002, 04:05 PM
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Post strange driveline vibration?

I'm getting a strange vibration somewhere in the driveline of my 68 fairlane? Its got a 351W, 4-speed, and 3.50 posi rear. Vibration damper is tight, bellhousing is tight, driveshaft hasn't thrown it's balance, tires are balanced and have no knots. Vibration starts at about 3300 rpms and quits at 4000. Any ideas?

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Old 11-09-2002, 04:46 PM
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Universal joints going? Give-em a wiggle and if it moves even slightly you have found your problem.
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Old 11-10-2002, 04:45 AM
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74 Dodge PU did something like that. Picked up a vibration/shudder at about 2500rpm and it went away at about 3000rpm. Cralled under and looked around, universals were ok front and rear, new tires,wheel lugnuts tight, pushed UP on the tail shaft of the trans and it moved, the rubber mounting had torn into.
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Old 11-11-2002, 03:50 PM
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want to hear a even weirder one. on my bro in laws 86 mustang we developed a light drive train vibration. i tried balancing the tires over and over. checked the u joints, checked axles, driveshafts weights, bearings, tranny mounts ,tranny tailshaft bushing. you name it it was checked. so i just decided to balance the driveshaft out of desperation. as i took down the drive shaft some thing inside made a clunk.
i cut the shaft in half and found a rubber o ring with a small piece of pipe inside. the pipe fell out of the oring and was moving around inside the driveshaft causeing a imbalance.
so i installed aluminum unit and no more vibration.

anyone ever see a pipe in the driveshaft before.
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Old 12-12-2002, 05:18 PM
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had a similar problem in a toyota P/U, replaced the clutch, pressure plate, throwout bearing, and pilot bearing, no more vibration, i believe it was the pilot bearing causing the problem.
(yeah, i know, toyotas aren't supposed to have problems,,,350,000 miles on the original clutch, NOT BAD,HUH??????????
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Old 12-12-2002, 08:13 PM
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you must not be one to see how well a toyota can smoke the tire... don't laugh my g/f 90 pontiace sunbird (more pathetic than the toyotas)can smoke the tires pretty good especially with the e brake on
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Old 12-12-2002, 08:14 PM
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Oh yeah by smoking the tires I mean a little sqeak and the thing doesn't blow up
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Old 12-13-2002, 05:33 PM
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If all the other replys don't work check your axles. I have had a similar problem that was caused by a slightly bent axle.
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Old 12-14-2002, 11:08 AM
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[quote]Originally posted by Necro:
<strong>

anyone ever see a pipe in the driveshaft before.</strong><hr></blockquote>

see it all the time, gm did it alot. supposed to work like a damper, bigger drive shafts some times use cardboard tubing inside.
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Old 12-14-2002, 07:25 PM
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[quote]Originally posted by stonedchihuahua:
<strong>Oh yeah by smoking the tires I mean a little sqeak and the thing doesn't blow up</strong><hr></blockquote>

i dont smoke the tires on the "yota", i save that for my '85 cutlass, 455 with a 400 tranny, shift kit, motor is stock except for the intake and the carb. i smoke the tires when i can afford the gas!!!
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