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MG MGB Technical - Early Gearbox shifter thread size and pitch?

Anybody know the thread size and pitch for the shifter knob for the early (BENT) shifter 62-67 3 syncro.? Thanks
R Stegs

The one on the shifter of my 68 is 3/8" UNC and the ones on the RB cars are 7/16" UNF. So, there is a fairly good chance that yours is similar to the 68. Do you have any measuring devices--a set of dial calipers will give the major thread diameter and counting the number of turns in a 1/4" to 1/2" distance will give you the thread pitch. If not, go to a good hardware store and try turning on various sized nuts to see which one works.

Les
Les Bengtson

I don't know the answer, but am pretty sure it is different to the 68 one! The 68 had the 4 syncro box (as i am sure you know). I had a 70 car and when I removed the gearknob from that it did not fit my 67 car (3 syn OD). I bought a gearknob that self threads with a plastic insert. Not brilliant, but cheap! It doesn't really tighten up properly.

Iain
67 BGT
I D Cameron

It's a standard thread probably 3/8" NC. I bought a jamb nut at a hardware store for my 65. I went with the OEM stylel rubber mounted phenolic knob as I could never get the aftermarket walnut one (with metal insert) to stop the buzzing. I used the nut and washer to preload the rubber bushing in mine to keep it from moving. I have had many happy miles with that fix.

I'd try a jamb nut and washer under your knob and see if that keeps it from spinning and buzzing.
Robert McCoy

The threads on the shifter in our MGB (66 w/3 syncro box) is 5/16 - 24, I just checked it. Cheers - Dave
David DuBois

Thanks
R Stegs

Robert,
I have the same problem with the buzzing knob.
It is amazing how loud it gets!

Rich
Rich McKIe

Shades of Grandmere in 'Allo Allo' ...
Paul Hunt

This thread was discussed between 05/08/2008 and 13/08/2008

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