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MG MGB Technical - Differential thrust washers of brass?

My 1966 MGB-GT long has had a clunk in its tubed-type rear axle. Components were found to be tight, so I dissembled the differential to replace the thrust washers. I found that the differential gears did not have the fiber thrust washers behind them. Instead, they have brass washers that are exactly the same size, shape, and thickness as the fiber replacement ones that I had ready. These brass thrust washers donít appear to be badly worn. Note that I am not confusing these with the cupped brass washers found behind the pinion gears.
None of the literature that Iíve read says anything about differential gear thrust washers that arenít fiber. My first question is whether this is a stock MGB thing. My second question is how to proceed. Should I reassemble the differential with the brass thrust washers, add the fiber thrust washers to the brass ones, or replace the brass thrust washers with the fiber ones?
Thanks in advance for your advice,
M.E. Whalen

With the Sprite/midget/Minor/A35 type differentials, some have brass/copper(?) washers and some have fibre. I'm not sure when they changed, or why, but I think I would prefer the metal ones. I have seen some very badly worn fibre washers.
Dave O'Neill 2

This thread was discussed on 26/09/2010

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