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MG Car Repair/Transmission clearance


Hi Barrie, I'm rebuilding my MGTD tranny with the help of your dvd,using Moss's catalog for reference, I have about a 1/8th inch space between part # 101 (sliding hub,1st& 2nd) and part #61(circlip). Is there a specific clearance that should be there?

Hi Joseph.  

There is no recommended clearance for this gap and there is no provision for adjustment.  

I have rebuilt a few gearboxes with up to 2mm of play and they are now in regular use without any problems.  I did once overhaul a box with 3mm of play and it worried me, so I decided to fit a spacer washer between the gear and the circlip to close the gap to the clearance recommended for the MGA gearbox (.004" - .006").  The result was a very noisy gearbox, so I quickly removed the spacer and the problem went away.  

If you are worried, fit a spacer washer, but I would not recommend that you close the gap below 1mm (.040").  

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Barrie Jones


MG Sports Cars from 1949 to 1980 - Including MGB, MGBGT V8, TF1500, TF, TD and modern Midgets. I also specialise in SU carburettors, Lucas wiring, suspension, steering & brakes.


I have owned my 1955 TF1500 since 1966. Technical specialist for the TD and TF with the MG Car Club T Register. Also owned 20 MGBs and currently own an MGBGT V8. Written 3 books on MGs and produced a DVD on how to strip and rebuild the TD/TF gearbox.

MG Car Club.

Barrie's Notes on the 1953-55 MG TF (author). /=====/ Barrie's Notes on the MGB (author). /=====/ Barrie's Notes on the MGB GT V8 (author). /=====/ The Essential Buyer's Guide to the MG TD, TF and TF1500. (author)

M Phil, C Eng, BSc (Eng).

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