[REVS]

Looking for some help with front end vibration. I have a 2001 D2 with 107000 miles. The truck vibrates at 35 mph and above. I replaced the front shaft with a new shaft but still vibrates. I brought the new shaft to a local drive shaft shop to check balance and every thing was good. The truck does not vibrate with driveshaft removed and CDL locked. I now have chirp coming from the driveline? Could this be a bad front output shaft bearing? The flange has some play with shaft removed.

 

[JAKD-UP]

I pretty sure its your front output shaft

 

[Disco Mike]

Where did you buy that replacement drive shaft, was it new or used and if used, was the center ball replaced?

 

[REVS]

The shaft was new from Lucky 8. The original was replaced because the lack of grease fittings and vibration. Now I have a new shaft, balanced checked and chirping? I'm going to pull the shaft and listen for any chirps.

 

[JAKD-UP]

Chirping is the sound of them before they let loose and take out the tranny....have you checked the rear shaft

 

[JAKD-UP]

Ive had two TW throw the weights before and cause a vibe but the chirping is something I'd pay attn to

 

[REVS]

Truck runs smooth without front drive shaft. Rear shaft seems fine, flex coupler looks good. Maybe I can lift it off the ground and listen.

 

[JAKD-UP]

If you can jack it up and put jack stands under all 4 corners and put it in neutral and check everything

 

[Disco Mike]

If there is no chirp when the front shaft is not connected then don't waste your time jacking it up, cause you already found the problem.
Have you spoken the Lucky 8 or Tom Woods to get their help?