Vibration at speed

[notlimah]

Not sure if this is the correct area to put this, sorry if it is Mike

 

Anyways, just want to get your thoughts on what I have going on. Between 40-50mph I'm getting some vibration which I'm thinking is a tire balance issue? It's almost like I'm going over a whole bunch of small bumps in the road, but that's not it because it happens everywhere that I'm between 40-50mph. It's nothing violent and doesn't effect the steering or anything, but it is annoying. Should I check anything else?  

[Wild and Free]

Other than tire balance or bent wheel it could be Drive shaft out of balance, u-joints bad or bad hanger or carrier bearing on rear drive shaft if a long box, Brake rotors, front axle shaft u-joints.

[CUMMINSDIESELPWR]

i had a similar thing happen, the carrier bearing got worn and walked the whole driveshaft forward out of the cradle.

[Hawkez]

Pull the tires and check the rubber.  Do you have any spots that are more bare than others? Cords showing in one area?  Just a thought.

[Mopar1973Man]

I got one that is shimmy in a different speed range like 60-70 MPH. So I'm going to digging at my truck like other have said check all things that rotate. Driveshafts, axle bearings, rotors, etc.

[CTcummins24V]

All great answers, I have run into this problem as well. Check tires for cupping, and what wild and free said

[Wild and Free]

Make sure your tranny mount is good as well if 4wd it is under the t-case.

[notlimah]

Sorry for the delayed reply fellas, been swamped lately!

 

So just so you guys know I'm only 2wd (if that changes anything) and I'm not too savvy on how to check most of the stuff you guys are suggesting checking!

 

John, what's cupping?

 

Would I just be better off dropping it off at the shop and having them give it the once over? I know that's not ideal (especially with this group! ) but I'm not that great when it comes to this kind of work on vehicles!

[Mopar1973Man]

Ok... Nothing you need a shop for.

 

For tires just take your hands and run them over the face of the tread feeling for uneven tread face. Usually you can see cupping occur as a spot wore lower in one spot. Like my last set of tire were cupping on the inside edge some and visual you could see the little cups.

 

For bearing just jack up each tire and the grab from the top and the bottom. Try rocking the tire. If the tire moves the bearings are wore. Should be zero movement.

 

Driveshaft I suggest removal. Once removed and tension off the u-joints you can feel how loose the joints are. Also then you can check the driveshaft carrier bearing for issues as well.

 

Rotors are easy too jack up a axle and stand a pointed object up with the point near the edge of the rotor. Now slowly rotate the tire and see if the rotor wanders in/out much. Also do it for the wheels to. If the wheels wander in and out you might check and see if the wheel was seated completely before tightening.

 

I'll be doing all these as soon as I get rid of the Chevy Blazer in my shop today.