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Author
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Topic: vibration again!
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JohnCM
CAFords OG
Member # 1076
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posted
 
 
My car used to have a vibration whenever going faster than 70 due to the U joints being bad. I fixed it by buying an FMS alum. driveshaft and it took care of the problem for the most part. But when I accelerated hard it would still vibrate a little bit, then my T5 blew and I replaced the T5 not too long ago maybe a month or something ago.
Anyways, it's been working fine after I changed the transmission minus the synchros aren't in the greatest shape. But now when I'm driving about 55+ and if I let out of the gas it will vibrate. Not too harsh, But I'm not wanting to find out how much worse it gets the faster I'm going..
So I don't have the slightest clue as to what it could be. Maybe a balancer?
Any suggestions before I tear my car apart?
![[Confused]](confused.gif)
Posts: 3545 | From: Roseville | Registered: Mar 2002
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mtbaughs
Road Racer
Member # 4052
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posted
FMS driveshafts tend to suck when it comes to balancing. Some people including myself have used a standard worm drive clamp around the shaft like a counter weight to get the driveshaft closer to being balanced. Mess around with the positioning of the clamp and see if it helps. It's a cheap try.
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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BlueOvalRacing
¯
Member # 1531
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posted
Rotate the driveshaft 180 degrees at the pinion flange first, and see if it gets better/worse, then try a clamp suggested by mtbaughs
Posts: 1159 | From: Pioneer | Registered: Jul 2002
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mtbaughs
Road Racer
Member # 4052
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posted
quote:
Originally posted by BlueOvalRacing:
Rotate the driveshaft 180 degrees at the pinion flange first, and see if it gets better/worse, then try a clamp suggested by mtbaughs
This works also a lot of times and can also point out if the driveshaft is the issue
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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BlackNGold
CaliforniaFords.com
Moderator
Member # 655
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posted
quote:
Originally posted by mtbaughs:
FMS driveshafts tend to suck when it comes to balancing. Some people including myself have used a standard worm drive clamp around the shaft like a counter weight to get the driveshaft closer to being balanced. Mess around with the positioning of the clamp and see if it helps. It's a cheap try.
How do you know where to position the clamp on the d/s?...
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-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
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mtbaughs
Road Racer
Member # 4052
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posted
It's something you just play around with. Usually I mount the clamp just behind the front u-joints. Than rotate the clamp to different positions and see if it has any affect on the vibration. Sometimes it works and other times it doesn't but it's a cheap fix in a lot of cases.
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R.I.P. Charlie Bruno Dec 2001
Posts: 2019 | From: Boise, Idaho | Registered: Jan 2004
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RedBaron
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Member # 4361
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posted
Hate to point out the obvious, but Driveline services, and other companies like that, can balance driveshafts. I don't think it's very expensive, either.
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1988 4i coupe,
88 gt
85 ttop-
Posts: 830 | From: S.S.F. | Registered: Apr 2004
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