 Still Vibrating... |
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| MikeM |
 Aug 19 2011, 12:54 PM
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Senior Member  Group: Members Posts: 564 Joined: 16-May 10 From: Calgary, Canada Member No.: 11,733 Region Association: Canada  |
Hello all...I recently posted about a vibration I'm having at 30 and 60mph.
I have some new information to share and some more questions. I purchased the hub centering rings from Chris Foley and they made no difference. Today I took the car to my mechanic's shop and we put it on a hoist and I ran it up to 70mph. The shake/vibration was still there!! So, it's obviously NOT in the front end. Mechanice says he's pretty sure the shaking stopped when I put the trans in neutral and turned off the engine. Although that could be a function of the speed reducing also. So, where to look now? Flywheel? CV joints/axles? Car is a 74 2.0 liter. Thanks as always... Mike |
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| smontanaro |
Aug 19 2011, 01:12 PM
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Senior Member Group: Members Posts: 1,190 Joined: 3-June 05 From: Evanston, IL Member No.: 4,197 Region Association: Upper MidWest |
Probably not the first place to look, but many people converting 914s to electric power have reported vibration which turn out to be caused by aging transmissions. Rebuilds I think have generally solved the problem.
Any large mass which is rotating at high rpms can be the culprit. Can you eliminate some components from consideration? What if you rev in neutral to the rpms you'd run at 30mph and 60mph? What about with the clutch pedal depressed? Just thinking out loud... S |
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Posts in this topic
MikeM Still Vibrating... Aug 19 2011, 12:54 PM
MikeM Good thoughts...NO vibration when revving in the g... Aug 19 2011, 01:26 PM
SirAndy Must be something in the trans or CV joints and sh... Aug 19 2011, 01:34 PM 914Mels How about shifting into neutral at the vibration s... Aug 19 2011, 01:37 PM MikeM Yup...clutch and flywheel are on the "suspect... Aug 19 2011, 01:44 PM SirAndy Motor mounts look new.
How can you tell? They are ... Aug 19 2011, 01:59 PM 76-914 Jack it up with one rear wheel on the ground and t... Aug 19 2011, 01:48 PM MikeM Sir Andy....to be honest, I'm not sure. I was ... Aug 19 2011, 02:08 PM r_towle There are a few bearings inside the transmission t... Aug 19 2011, 03:37 PM SUNAB914 How about front wheel bearings? Make sure theyt ar... Aug 19 2011, 04:02 PM Ductech If the clutch and or flywheel was imbalanced would... Aug 19 2011, 05:57 PM r_towle his test on a lift eliminates both the front end b... Aug 19 2011, 06:00 PM MikeM Thanks Rich...here's a related question...
Is ... Aug 19 2011, 06:20 PM r_towle yes, you can pull the gear stack in the tranny wit... Aug 19 2011, 06:41 PM MikeM Sorry...I wasn't clear.
I was asking if it... Aug 19 2011, 07:07 PM SirAndy I was asking if it's possible to remove the Ax... Aug 19 2011, 07:52 PM MikeM Thank you Sir...I think that will be my next chore... Aug 19 2011, 09:06 PM larss I had a similar problem with my 914. It turned out... Aug 19 2011, 11:09 PM willamp I had a vibration in my car recently and the probl... Aug 20 2011, 07:38 AM MikeM Thanks gents...obviously I have a few things to in... Aug 20 2011, 08:06 AM MikeM I'll bump this in case anyone has any ideas...... Aug 21 2011, 01:50 PM |
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