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06-21-2010, 03:47 PM | #1 |
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Nasty Vibration
The Monte has developed a very bad vibration in high gear. Changed driveshafts and the problem seemed to lessen temporarily, but it's back as bad as before. The driveshaft is straight. Dad can barely hold the shifter back in 4th as he crosses the finish line. We are taking the tranny apart to see if the mainshaft is bent or ???. Can a ring gear be out of balance? We are sending the clutch and disk away to get balanced. Axles ???.
Any help would be appreciated as we're really scratching our heads on this one. Many thanks in advance!!
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Mike Voth 5189 GTN - 5188 GTO Voth Racing |
06-21-2010, 04:36 PM | #2 |
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Re: Nasty Vibration
Just random thoughts, but 1, Make sure rear hasn't moved (string-measure both sides, center of front whl. to center of back whl.) 2, Pinion bearing going bad, or something moved inside rear? Good luck....WJ
Last edited by W J; 06-21-2010 at 04:43 PM. Reason: splchek.... |
06-21-2010, 04:40 PM | #3 |
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Re: Nasty Vibration
Might have lost a wheel weight or two???????
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06-21-2010, 04:50 PM | #4 |
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Re: Nasty Vibration
Several years ago, I had a front wheel/tire out of balance at Scribner that caused my vision to blur so bad that I could not see the scoreboards.
It shook everything in the car. I had Joe Archer re-balance and cleared it up. |
06-21-2010, 07:56 PM | #5 |
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Re: Nasty Vibration
Rear bushing in tranny or main shaft bearing.
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Adger Smith (Former SS) Last edited by Adger Smith; 06-21-2010 at 07:57 PM. Reason: sp |
06-21-2010, 08:08 PM | #6 |
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Re: Nasty Vibration
Had a similar problem years ago. I had the drive shaft rebalanced, changed the bushing in the trans tail shaft housing, and also had the front and rear wheels rebalanced. Problem was still there, bad vibration about the last 300' of the track. Ended up breaking the trans case across the bell housing. I put a new Dedenbear trans case in the car and the problems was still there. By this time the rear tires needed replacing and bingo the problem went away. Smooth as glass with the new tires. Before this problem started the car had sat in the garage for two months while freshing the engine. I had neglected to put the car up on jack stands and I guess the rear tires got flat spots. Won't make that mistake again.
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4878 SS/GA 66CHEVY II |
06-21-2010, 09:55 PM | #7 | |
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Re: Nasty Vibration
Quote:
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Stephen Johnson #2162 Horace Johnson #2167 SS/D 427 Ford Fairlane NHRA-IHRA |
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06-21-2010, 09:57 PM | #8 |
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Re: Nasty Vibration
Mike I had the same thing last year. I could not hold the shifter in high gear. Pilot bearing came out in pieces when we dropped the can. Ed
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Ed Carpenter 2005 Chevy Cobalt A/SM Race Engine Development |
06-21-2010, 10:00 PM | #9 |
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Re: Nasty Vibration
I had a similar situation when a couple of bell housing bolts had backed out earlier this year, sounds simple but it can happen.
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Tracy Robbins SS 9766 |
06-22-2010, 09:16 AM | #10 |
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Re: Nasty Vibration
Housing is centered. Pinion bearing feels good and rotates smooth, but 3rd member is coming out tonight, so we'll see. Thanks
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Mike Voth 5189 GTN - 5188 GTO Voth Racing |
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