Question about 1999 GMC Sierra
GF has 2000 Sierra 1500 4x4 and while changing oil and plugs today noticed a lot of grease/gear oil leakage slung all over left front knuckle and fender shield. Not familiar with this assembly so at first thought the boot on the CV joint had failed. Inspected boot and could find no tears or obvious leakage points. It really looks like gear oil. Are these spindle bearings lubricated with gear oil? Most spindle bearings I've seen are sealed but I was wondering if there might be some type of seal that has failed in the hub and is allowing the gear oil to sling out.
IF this is the driverside. The vent tube for the fourwheel drive is on that side it might be plugged that is where i would start look to see if the axle is full of oil if not i bet that is the problem. Find the vent hose and blow out with air
Posted on Feb 11, 2009
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