Re: The rear axel blues!
Posted by HH56 On 2016/6/7 15:36:36
Believe the backing plate is actually what holds the axle in. I've drawn it in below for reference. Can't remember without looking which side the gasket goes on but think I show it correctly with the shim(s) being only thing between plate and axle housing.
The taper roller bearing is against the lip on axle on one side and contained by the bearing cup on the other side. The bearing cup should be a larger diameter than the hole in the backing plate. Shims are placed between the backing plate and axle housing to adjust the end play but once the backing plates are tight there should be no way for the axle to move outward more than the thickness of the shims before the cup presses against the backing plate.
Both axles work in tandem with a thrust block inside the differential between the ends of the axles. Axles press against the thrust block but not attached. End play is adjusted so there is the specified clearance and any expansion won't be enough to lengthen axles and cause the bearings to tighten or bind.
It is possible to break the thrust block but don't believe it can fall out of position and become ineffective.. If it were not in position the axles would want to move inward. The taper bearings can let the axle move inward until they hit something in the housing but not outward. If the axle was was moving in slightly the drum could be scraping against the backing plate but I would think you would be having other larger issues too.
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The taper roller bearing is against the lip on axle on one side and contained by the bearing cup on the other side. The bearing cup should be a larger diameter than the hole in the backing plate. Shims are placed between the backing plate and axle housing to adjust the end play but once the backing plates are tight there should be no way for the axle to move outward more than the thickness of the shims before the cup presses against the backing plate.
Both axles work in tandem with a thrust block inside the differential between the ends of the axles. Axles press against the thrust block but not attached. End play is adjusted so there is the specified clearance and any expansion won't be enough to lengthen axles and cause the bearings to tighten or bind.
It is possible to break the thrust block but don't believe it can fall out of position and become ineffective.. If it were not in position the axles would want to move inward. The taper bearings can let the axle move inward until they hit something in the housing but not outward. If the axle was was moving in slightly the drum could be scraping against the backing plate but I would think you would be having other larger issues too.
Attach file:
(119.28 KB)
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