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Q & A: Ring Gear

John
I am doing a complete rebuild of 1970 MGB Roadster and as part of it I
was going to install a new ring gear. I would like to know what is the ID
of the ring and what is the OD where it fits to the flywheel? In other
words what is the interference fit? The reason I ask is because I think
the old ring gear was slipping because there is a ridge that the old ring
gear had to get over in order to get it off. I can't imagine that ridge
should be there. It would seem to me the two dimensions should be in a
manual since you should check them before installing a new ring gear. None
of my 4 manuals have anything.
Don

Don!

In my 30+ years of working on MGs, I've never seen a slipping ring
gear from any engine, any year. Further, I am not certain if I have ever
had to change a ring gear on a 68- MGB since the starter motor is read more