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guapo · 01-10-2008, 08:33 AM

When you are shifting from 4wd to 2wd you are changing the amount of load that the differentials are having placed on them. I would beleive that if there is as way to jack up and truck and place in it gear then that might work to find out what the problem is. They can then look. If the front drive shaft is not ballanced or it could cause this problem. Or if the drive line is out of line/balance this would cause this as well. One way we checked was to place the vehicle on 4 jack stands and loosed up the center bearings and place in drive and let it run and then retighted everything up. To me it seems to be in the drive line. Since it is 4wd did it start after a 4 wheeling trip. IMO Good luck

01-10-2008, 08:33 AM	#14 (permalink)
guapo Senior Member Join Date: Nov 2007 Location: Crestview Fl Posts: 269	When you are shifting from 4wd to 2wd you are changing the amount of load that the differentials are having placed on them. I would beleive that if there is as way to jack up and truck and place in it gear then that might work to find out what the problem is. They can then look. If the front drive shaft is not ballanced or it could cause this problem. Or if the drive line is out of line/balance this would cause this as well. One way we checked was to place the vehicle on 4 jack stands and loosed up the center bearings and place in drive and let it run and then retighted everything up. To me it seems to be in the drive line. Since it is 4wd did it start after a 4 wheeling trip. IMO Good luck __________________ For those who serve our nation. Our Prayers are with you.