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MG MGA - gearbox assembly

I now have the mainshaft re-assembled with a couple of new thrust washers.
I notice that the 2nd gear sunchronizer hub has about 1/8" of free movement. I can't see any bits missing. Is this normal?
Art Pearse

Art -
Yes, it is this movement that actuates the synchro mechanism. The fork moves the outer sleeve, by way of the three springs & balls; The hub contacts the baulk ring, which blocks the outer sleeve from moving further until it is synchronized - we hope!

FRM
Fletcher R Millmore

Fletcher, it is the inner sleeve which has the 1/8". Still OK?

Art Pearse

Art -
Yes. Study the action. And you will see that 3/4 has the same once you get that far.

I see I left out a phrase:
"The fork moves the outer sleeve, >> then the outer moves the hub, << by way of the three springs & balls,...

FRM
Fletcher R Millmore

Make sure that end floats and so on are within factory specs or you will be disappointed with gear changes, etc. I restored my 1600 coupe back when (genuine) new spacers etc still available but the "thickest" available would not restore factory specs so I had some made. Quite simple to do and well worth the trouble (make sure that they are made out of, is it, phosphor-bronze?). Far better than my 1600 roadster gearbox which was professionally rebuilt prior to my ownership.
Barry Bahnisch

Barry, done that! After a lot of confusion on my part about the clearances, clarified by FRM, I obtained one new centre thrust washer and a +4 thou front thrust washer, all is fine. I also managed to get the OEM rollers for the layshaft.
Art Pearse

This thread was discussed between 26/04/2010 and 27/04/2010

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