OK, I have set up literally HUNDREDS of rears in my time as a mechanic. Some things to know....
First, if you are getting a kind of ringing/howling noise, it could be that the ring and pinion are worn out. Test for ring and pinion noise by driving. Noise will be more on either the coast or power side. If it is the same on either, it is probably NOT the ring and pinion. Also, ring and pinion noises generally come in at some speed, and as speed increases, they fade out.
Second, to replace pinion bearings, you only need to re-use the original shims. Pinion depth is set BEFORE bearings are installed, and is the relationship between the pinion gear and the housing. The depth measurement is taken with the bearing cup in place, and varies by as little as .001". New pinions are mark4ed with plus or minus numbers that indicate deviation from "nominal" pinion. Bearings come into play later. They are installed AFTER depth is measured and shims are selected. Therefore, the old shims will be fine.
Third, bearing preload. Once you have changed the bearings, preload is set by the crush sleeve. It should be MEASURED with a "sway bar" type torque wrench. You tighten until the correct drag is MEASURED.
Fourth. Carrier bearings and wheel bearings can also cause noises. Be sure that you are replacing the right bearings or you could end up spending a lot of money on parts without fixing the problem.
Lastly, Noise is NOT inherent in ALL rears as previously stated. That is the reason that these gear types are used. They run quietly!
If you have any other questions, feel free to email me.
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Today's Featured Article - A Brief History of Tractors in Australia - by Bob Kavanagh. After Captain Cook's exploration of the east coast in 1770 the British Government decided to establish a penal colony in Australia. The first fleet arrived in 1788 and consisted mainly of convicts who were poorly equipped and new little of farming techniques. The colony remained far from self-supporting and it was not until the early 1800's that things started to improve. Free settlers started to arrive, they followed the explorers across the mountains and where land was suitable set up farms. T
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