Quote:
Originally Posted by CKENDZIORA
i just had new tires put on? also is the front drive shaft to turn while in park if you go beneath the truck? Also these are some used tires would that make the issue worse?
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If the USED tires have different wear yes this will cause this.
rotate the tires to the rear to see if it is the tires.
front drive shaft may rotate or not rotate. this would have nothing to do with the vibration at 50mph.
just to be sure that the vehicle does not have the front diff actuator stuck in the locked position lift the front wheel off the ground . if in 2wd the wheel should rotate. when in any 4wd position it should lock up .
when in 4wd the front axle is locked by the locking actuator so that the axle is one solid connection to each front wheel. with tires of different sizes this damages the gear box/drivetrain.. since you have vibs at 50 mph it is most likely balancing of tires or a defective used tire.