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Posted by Terry [76.70.65.146] on Tuesday, May 01, 2012 at 17:16:23 :
In Reply to: Pinion setup problem posted by Desoto61 [98.166.17.169] on Monday, April 30, 2012 at 19:17:05 :
How much end float do you have on the double front bearings?. Mine had about 0.017" end float when I went to reinstall them. When the front bearing wears it really changes the axial float a lot. I took my front bearings to work ground about 0.008" off of each of the inner contact faces , ultrasonically cleaned them in a bearing approved solvent and then rechecked the end float. When I got them together I had 0.000" end float to 0.002" preload on them. This is how they were originally setup from the bearing manufacturer. The stock sized shims then fit in and the torques came out to 60inlbs. This is for a front axle as well so I had no concerns about longevity. If I was rebuilding the rears I would use a new bearing. I know the bearing is really expensive now but what I did is buy the double cup and bearing cones separately. The NA series cones are really expensive so buy the regular series cones. Assemble the three parts on a pinion shaft held in a soft jawed vise. Measure the bearing assembly total height and then each bearing cone separately. Subtract these dimensions and this will give you the space between the twoinner bearing faces. Mine were all around 0.326". I then machined up a new spacer using the original one for diameters to a size of 0.325". This gives 0.001" preload on the new bearings and makes it runs nice. Then just assemble the gear set like normal. The total costs for the new bearings was around $ 180.00. A lot nicer than the 400-600 range now being offered. Terry
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