Had the rear u-joints replaced recently at Firestone. Was OK for 2 days until driving on the highway I heard what sounded like a gun shot and then some very serious driveline vibration. I pulled over, one of the caps from the u-joint at the CV to driveshaft was missing. It got fixed but now have driveline vibration. I finally found a shop that could balance a Toyota shaft with CV joint - they balanced it, straightened it (said it looked slightly twisted) and told me long as it was off the truck, I should replace the moderately worn carrier bearing which by the way Toyota is getting $170 for these days. I put it all back together only to have the same amount of driveline vibration.

So I started adjusting the carrier bearing alignment. You can almost double the amount of drive line vibration when the bearing is grossly mis-aligned. I almost had bearing aligned where I could live with it before applying the ôfinal tweakö that totally messed it up. Using the FORCE to find the sweet spot isnÆt working out, who knows the secret?