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The concaved or convexed washer(depending on what side you view it from), is absolutely designed to pre-load the center section and maintain proper tension on the cir-clip (i.e. snap ring). Without it in place there will be end play between the CV center section and the axle shaft shoulder to the cir-clip location. End play here is BAD. It WILL LEAD TO FAILURE of the CV axle shaft assembly, both quickly & badly.
When reassembling the CV axle unit, definitely re-use the big (Belleville) washer. As long as the washer is still "cupped" it will perform the needed function.
You do not need to replace with new, unless the washer is damaged. If the washer is damaged due to wear, odds are so is the axle shoulder that the center section butts up against.

Mark
Old 01-20-2009, 03:32 PM
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