Driver side stub shaft loose in Diff.

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crackerjack1957

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Jerry,

Truck is not beaten on at all. It isn't the tires. As I noted in my original post that I'm now on the 3rd set of tires and countless balances. When I go under the truck the passenger side CV is nice and tight. The driver side has several mm's of up down/ side to side movement and it is the stub moving in the differential NOT the CV on the stub shaft. CV and stub have been replaced with no change.
Remove front drive shaft & CV axles to confirm.
 

crackerjack1957

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Remove front drive shaft & CV axles to confirm if vibration is still there.
Echo...........echo.........echo.......LoL
I click on edit & it double post.
Maybe not........maybe my eyes......LoL
 
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Jeepwalker

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Different make, but my H3 had the same issue. I replaced the bearings on the driver's side and the slop went away. It was a fairly straight forward job. The biggest challenge was getting the spindle out of the way so the half-shaft would clear.

Axles don't rotate very fast. Not likely your vibration. Still not a bad idea to replace the bearing if you want to tighten it up. Did you have anyone (or do yourself) check the wheel for run-out ..as in bent wheel/axle? Tire shops are always going to check the tires for balance, but there could be a broken chord or the wheel could be wobbling in and out due to some issue.

Quick story: I went to replace a front wheel hub 6 months ago in another 4x4. Got a replacement from OReilly. My normal inclination is to go OEM, but I wanted it done right away (mistake). I checked it for run-out with a dial indicator prior to installing. Glad I did. There was about .005 run-out at the hub face. Had I installed it, the rotor would have been impossible to get 'true' and the wheel would have wobbled. New OEM hub ran absolutely true. So it's worth checking side to side motion on the wheels. It would be good to eliminate that as a possibility.

And of course the front driveshaft is a common source for vibrations at a certain speed like you indicated.
 

MoneyPit14

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Did anyone ever get to the bottom of this issue? I’ve been chasing the mystery vibration in my front end as well. Replaced stub and intermediate shafts a couple months ago. Still felt the vibrations. Pulled it apart again and noticed stub shaft on driver side had ALOT of play, and rough rotation. Tempted to put it back together without the CV shaft and drive it, to see if it the bad vibes go away. Also tempted to ghost it off a cliff. Love the thing, but I’ve spend countless hours working on it. 193k and counting.
 

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Jeepwalker

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If a guy is running 33" tires, for example, the revolutions per mile is only ~610. That's pretty slow rotation if you're doing 60 mph..that's 610 RPM. Tires are a lot heavier than inboard CV's. Have tires Road Force balanced/checked. Be sure to check for wheel warpage (on the vehicle) in case wheels are wobbling (warped axle flange??). Shops almost never check that on the vehicle. But should be done if the aim is to eliminate vibration sources.

If the inner CV is super-sloppy, it's worth a look. It's possible inner shaft Replacement is necessary. ...and CVs too, if worn. Only way to know is to look and measure. But before doing surgery, I would have a shop put a dial indicator on the wheels on-vehicle to find vibration. I once bought a brand new aftermarket hub/bearing assembly. The wheel flange was warped. If your truck had something like that, there would be a big vibration.
 
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