Drive shaft balance

nielsmobers · 03-31-2003, 03:52 AM

Imagine that I have a imbalanced drive shaft, at which speeds should I notice that?? I had a decayed transmission mount, after replacing this the harmonic vibration was deduce a lot, but when reach speeds above 55mph an other vibration seems to enter...

Dark Knight · 03-31-2003, 07:48 AM

did you check the u-joints? unless a weight comes off the driveshaft.. they dont just go out of balance..

check the wheel balance too...

mustangII460 · 03-31-2003, 08:24 PM

Try running your transmission in two different gears at the speed you get the vibration.

If it vibrates in both gears at the same speed its in your tires.

If it does not vibrate at the same speed, its in the driveline.

Confusing but I hope this narrows it for ya.

Jeff65 · 04-02-2003, 05:09 PM

Quote:

Originally posted by Dark Knight
did you check the u-joints? unless a weight comes off the driveshaft.. they dont just go out of balance..

check the wheel balance too...

No, but they do get bent and bent shafts vibrate. A simple check is to remove the driveshaft and roll along a flat surface (table) and see if the middle bows or rolls flat. If you can see daylight under the driveshaft and it gets bigger/smaller as the shaft rolls chances are it needs work.

Almost any light duty axle shop can balance and check "u" joints for a small fee.

03-31-2003, 03:52 AM	#1
nielsmobers Registered Member Join Date: Jul 2002 Location: Holland Posts: 28	Drive shaft balance Imagine that I have a imbalanced drive shaft, at which speeds should I notice that?? I had a decayed transmission mount, after replacing this the harmonic vibration was deduce a lot, but when reach speeds above 55mph an other vibration seems to enter...

03-31-2003, 07:48 AM	#2
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	did you check the u-joints? unless a weight comes off the driveshaft.. they dont just go out of balance.. check the wheel balance too... __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

03-31-2003, 08:24 PM	#3
mustangII460 Factoy Five Roadster Join Date: May 2000 Location: Sevier Co,Tennessee Posts: 1,681	Try running your transmission in two different gears at the speed you get the vibration. If it vibrates in both gears at the same speed its in your tires. If it does not vibrate at the same speed, its in the driveline. Confusing but I hope this narrows it for ya. __________________ Frank Last edited by mustangII460; 03-31-2003 at 08:53 PM..

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