H3 Weird Vibration

[jacobharris84]

There is a distinct on/off vibration coming from under the passenger floorboard around 50mph and 2000rpm. The vibration is an odd on/off every second. I have the slightest clue what it could be. Please help.

 

[kilroy]

Right place for a bad U-joint or worse yet the rag joint.

 

[jacobharris84]

Right place for a bad U-joint or worse yet the rag joint.

How can I check?

 

[4speedfunk]

There is no rag joint on the H3. Most likely the CV on the rear end of the front driveshaft or possibly a half-shaft CV. Regardless...don't ignore vibes.
You can shine a flashlight up into the CV joint where it bolts to the transfer case...look to see if the rubber boot is torn or missing. Also look for grease flung all over the floor hump at the front output shaft. Both signs the the CV is dry.

 

[kilroy]

Sorry to confuse, meant the CV.