bad wobble 40mph to 47mph

davefan360 · 01-01-2009, 03:34 PM

when driving my truck normal it will sometimes wobble at 40mph or so. sometimes it is bad other times it is hardly noticeable. i was told i may need a front u-joint. but just want to make sure.

91gmc 3500 4x4 dump with 76k

thanks

merlin5577 · 01-01-2009, 03:37 PM

Is it a side to side wobble or just a vibration?

davefan360 · 01-01-2009, 03:43 PM

the steering wheel moves from left to rights bad so i would say a side to side wobble

merlin5577 · 01-01-2009, 03:49 PM

It might be a U-Joint, but I would lean more towards tires out of balance. Have the tires and suspension been checked out recently?

davefan360 · 01-01-2009, 03:55 PM

the tires have not been checked out. i will have to get them looked at. thanks

merlin5577 · 01-01-2009, 03:58 PM

Quote:

Originally Posted by davefan360

the tires have not been checked out. i will have to get them looked at. thanks

I would check the pressures, and have the tires rebalanced.

deftones904 · 01-01-2009, 04:34 PM

well my boss's dump truck has the same problem and he checked out the tires and suspension and hubs and bearings and nothing looked back then i layed under it while he turned the wheel while it was in park but running and i noticed that the frame rail was moving side to side with the steering... not saying thats your problem but i would do the same thing and see what is moving that shouldn't also put it up on a lift and try to move the tires with your hands if there is play in the tire something steering or suspension is bad. you can usually see. i dont think it would be a u joint because if you in 2wd that front driveshaft shoulnt turn.

leolkfrm · 01-01-2009, 06:10 PM

if evertyhing is tight i would suspect a belt shift in the tire

gmctrucks · 01-01-2009, 07:15 PM

I'm dealing with the same thing im thinking since my truck is 15 years young and I have never replaced my front brake rotors or turned them that I would buy new ones. Well my son was going to give me money so I said so that I can get it im going to have him buy them along with the front calipers BUT he just told me today dad I have to pay off some of my account to charge them and some girl owes me $200.00 dollars so I can't right now WELL that means it's not going to happen I can bet my life on it. Hey sorry for hi-******* the thread but im up-set guys you know what im talking about here or the problem with him. OK so when I went over to my buddies house for X-Mas I jack up the truck side per side and moved the tire around checking to see if it was my bearings were loose but it all checked out I even had my buddies son look under the truck while I moved the tire around but I don't think he looked to good.
Good luck! GMC
PS-Keep us posted and so will I.

heavychevy85 · 01-01-2009, 07:36 PM

steering stabilizer maybe ball joints

01-01-2009, 03:34 PM	#1
davefan360 Full Member Join Date: Dec 2008 Location: Troy MI Posts: 12	bad wobble 40mph to 47mph when driving my truck normal it will sometimes wobble at 40mph or so. sometimes it is bad other times it is hardly noticeable. i was told i may need a front u-joint. but just want to make sure. 91gmc 3500 4x4 dump with 76k thanks

01-01-2009, 04:34 PM	#7
deftones904 Junior Member Join Date: Dec 2008 Location: Columbus, OH Posts: 6	well my boss's dump truck has the same problem and he checked out the tires and suspension and hubs and bearings and nothing looked back then i layed under it while he turned the wheel while it was in park but running and i noticed that the frame rail was moving side to side with the steering... not saying thats your problem but i would do the same thing and see what is moving that shouldn't also put it up on a lift and try to move the tires with your hands if there is play in the tire something steering or suspension is bad. you can usually see. i dont think it would be a u joint because if you in 2wd that front driveshaft shoulnt turn. __________________ 1987 GMC Sierra Classic 1500 (350 throttle body injection) 1988 Izuzu Pickup (2.3L 2 barrel carb) R.I.P.

01-01-2009, 06:10 PM	#8
leolkfrm Senior Member Join Date: Mar 2008 Location: N.Y. Posts: 4,300	if evertyhing is tight i would suspect a belt shift in the tire __________________ 4 wheels move the body 2 wheels move the soul B.W.A.I

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01-01-2009, 03:37 PM	#2
merlin5577 Banned Join Date: Nov 2008 Posts: 675	Is it a side to side wobble or just a vibration?

01-01-2009, 03:43 PM	#3
davefan360 Full Member Join Date: Dec 2008 Location: Troy MI Posts: 12	the steering wheel moves from left to rights bad so i would say a side to side wobble

01-01-2009, 03:49 PM	#4
merlin5577 Banned Join Date: Nov 2008 Posts: 675	It might be a U-Joint, but I would lean more towards tires out of balance. Have the tires and suspension been checked out recently?

01-01-2009, 03:55 PM	#5
davefan360 Full Member Join Date: Dec 2008 Location: Troy MI Posts: 12	the tires have not been checked out. i will have to get them looked at. thanks

01-01-2009, 07:15 PM	#9
gmctrucks Senior Member Join Date: Nov 2006 Location: Houston,Texas Posts: 4,037	I'm dealing with the same thing im thinking since my truck is 15 years young and I have never replaced my front brake rotors or turned them that I would buy new ones. Well my son was going to give me money so I said so that I can get it im going to have him buy them along with the front calipers BUT he just told me today dad I have to pay off some of my account to charge them and some girl owes me $200.00 dollars so I can't right now WELL that means it's not going to happen I can bet my life on it. Hey sorry for hi-******* the thread but im up-set guys you know what im talking about here or the problem with him. OK so when I went over to my buddies house for X-Mas I jack up the truck side per side and moved the tire around checking to see if it was my bearings were loose but it all checked out I even had my buddies son look under the truck while I moved the tire around but I don't think he looked to good. Good luck! GMC PS-Keep us posted and so will I.

01-01-2009, 07:36 PM	#10
heavychevy85 Senior Member Join Date: May 2008 Location: Muncy, PA Posts: 290	steering stabilizer maybe ball joints