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Steel Baulk rings,


Duffy

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The steel synchro rings need hand lapping to mate with the synchro cones (same process as lapping a valve in). Apparently if this is not done they are prone to friction weld themselves to the cones (because if they don't have 100% contact they will slip too much ?). I have never really understood why once a ring is lapped to a cone it should need relapping so soon. Presumably because they are so flimsy the work involved in gear changing distorts them. Re lapping was not neccesary however with the Moly coated steel rings available from SPC (no longer made).I suppose that this was because the moly coating allowed some slippage without friction welding occuring.

 

There are even shortages now of Ford OE bronze rings (Paul Davis experienced this very recently). Dont forget, the type 9 box has been out of production for a long time.

 

Edited by - ecr on 16 Oct 2002 10:10:11

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