Mechanics

CHANGE PUMPKIN BEARING OUTS

2003 Jeep Wrangler

Drive Train Axles Bearings problem
2003 Jeep Wrangler 6 cyl Four Wheel Drive Automatic 60000 miles

How do you change the outter front end pumpkin bearings?
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Ccogar
April 1, 2009.



There is two bearings on the pinion. One bearing is on from the inside of the diff case and one sits behind the yoke on the driveshaft from the outside. To rplace you have to pull the axles drop the ring, pull the driveshaft and yoke and the pinion will come out with the inside bearing, the outside bearing comes out after the seal is pulled that sits behind the drive shaft yoke. When replacing the bearings you should also replace the races, they are the area that the face of the bearing actually rides against, they drive out and should be driven back in with a race driver. The new bearings come with a " crush Sleeve" that sets the Pre-load on the pinion bearing. This is set by tightening down the pinion nut to a certain torque. This should be done by a qualified mechanic or at least by someone that has done it before. Someone that knows how to do it. I work on these alot that have been done at home and in the end the customer usually is out more money. The new bearing preload and new races will change somewhat the gap between the ring gear and pinion. This has to be in a certain tolerance or you will " burn" a gear. Also they will sing at road speed and if out far enough they will make noise at slow speed and knock when going into gear. Also the crush sleeve has to be set properly because you only get one shot at getting it right. If you crush it to far by accident then it is no longer any good. Also I would not just replace one bearing without doing both. Hope this helps and we can help more than let us know. Curt

Tiny
Mechcurt
Apr 1, 2009.