driveline vibrations Reply #30 – May 20, 2010, 12:07:01 PM Just thought you might find this an interesting read since the OP brought it up:http://www.tccoa.com/articles/tranny/transmission/page17.shtmlDarren Quote Selected
driveline vibrations Reply #31 – May 20, 2010, 01:14:27 PM Quote from: ThunderbirdSport302;322591to the OP: can you swap axles to see if one (or both) may be bent?Thunderjet302 had a bent axle once....I am 99% sure that the last guy that worked on the rearend for me checked the axles. Maybe I need to recheck them. Quote Selected
driveline vibrations Reply #32 – May 20, 2010, 01:16:11 PM Quote from: 86T-bird;322577I have aluminium driveshafts in both cars and had them both balanced prior to adjusting the crossmember on the T-Bird (on the Mustang I replaced the drop mounts w/standard height mounts).Chasing an aluminium draftshaft is a red hearing, the material of the driveshaft is irrelevant.Isolating each component in a process of elimination is necessary. With the car on a lift or jack stands, start pulling off or disconnecting one item at a time. You've replaced lots of parts, it's got to be something simple. You'll find it and probably wonder how you missed it...Good luck.I think that the material of the driveshaft can be important due to its mass when changing to 3.73 gears or higher...at least that's how I understand it.You've got it right though...it has to be something simple! Quote Selected
driveline vibrations Reply #33 – May 20, 2010, 02:52:44 PM Quote from: ThunderbirdSport302;322591to the OP: can you swap axles to see if one (or both) may be bent?Thunderjet302 had a bent axle once....Yep passenger side. I replaced the axle and the vibration went away.Quote from: 50tbrd88;322623I think that the material of the driveshaft can be important due to its mass when changing to 3.73 gears or higher...at least that's how I understand it.You've it right though...it has to be something simple!I have a factory driveshaft and 3.73 gears. I have no noticeable vibrations at highway speed (I did have it rebalanced). I have a slight vibration between 73-77 mph on the highway that feels like driving over rumble strips but I know it's the road surface. How do I know? Every other car I've driven over the same stretch of road has the same vibration at those speeds:hick: Quote Selected
driveline vibrations Reply #34 – May 20, 2010, 08:54:25 PM Quote from: vinnietbird;322585I've always been taught that the aluminum drive shaft transmits less vibration that the steel one,and by the cast amount of Stang owners (and myself) who have also had great results from using an aluminum piece,I would agree.With a drive line vibration issue, checking the shaft for balance illiminates it from the diagnostic process. Aluminium or steel, makes little difference.If the desire is to replace the shaft w/aluminium as an upgrade & added expense, great. If the steel one is balanced, replacing it with aluminium won't get rid of the shake, something else is going on. Quote Selected
driveline vibrations Reply #35 – May 20, 2010, 09:45:43 PM I'm good with that.I still like the aluminum shaft a lot,and,it wasn't much.I spent about,or less,than $140.00. Quote Selected
driveline vibrations Reply #36 – May 21, 2010, 02:18:32 AM In regards to the driveshaft...is there anyone near you that has a Bird/Cat? If you could borrow another 'shaft for a few minutes, it may rule out yours being out-of-balance... Quote Selected
driveline vibrations Reply #37 – May 21, 2010, 08:49:28 AM Quote from: ThunderbirdSport302;322717In regards to the driveshaft...is there anyone near you that has a Bird/Cat? If you could borrow another 'shaft for a few minutes, it may rule out yours being out-of-balance...In my area seeing a fox t-bird/cougar is like seeing a unicorn these days. Most of the white trash folks have ragged them out by now.I guess Mercuryman is the closest to me or maybe Chuck W but I doubt if they would let me "steal" their driveshafts. Especially since I have never actually met either one of them.That is a good idea though. Quote Selected
driveline vibrations Reply #38 – May 22, 2010, 01:21:40 AM If you were out here I would let you borrow mine. I am sure someone has a stock driveshaft in your area laying around. Quote Selected
driveline vibrations Reply #39 – May 22, 2010, 08:32:38 AM Quote from: Haystack;322839If you were out here I would let you borrow mine. I am sure someone has a stock driveshaft in your area laying around.I appreciate that! Quote Selected
driveline vibrations Reply #40 – May 22, 2010, 08:50:09 PM Are you absolutely sure its coming from the rear and its not due to the front end being out of alignment? Quote Selected
driveline vibrations Reply #41 – May 22, 2010, 10:34:24 PM Quote from: sarjxxx;322895Are you absolutely sure its coming from the rear and its not due to the front end being out of alignment?Car has had the front end aligned twice since I've had a vibration. The 1st time was when i put the lowering springs in back on 2005, 2nd time was when I installed the Mustang front brakes a year or two ago.I've gone over the front end and everything seems solid. Quote Selected
driveline vibrations Reply #42 – May 23, 2010, 12:00:49 AM Quote from: sarjxxx;322895Are you absolutely sure its coming from the rear and its not due to the front end being out of alignment?A bad front end alignment won't cause a speed sensitive vibration. Quote Selected
driveline vibrations Reply #43 – May 23, 2010, 01:17:31 AM K well i was just wondering cause i have almost exactly the same problem but i know my front wheels are about 2" out of alignment with each other. Quote Selected
driveline vibrations Reply #44 – June 12, 2010, 06:34:44 PM I had a BAD vibration in my '86 (when I had it). When I would let off of the throttle the vibration would show its ugly head. I replaced the u-joints on the driveshaft and it all went away. Quote Selected
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