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MG Car Repair/Overdrive switch


Barrie, I have a 1978 MGBGT made in UK.The Overdrive switch is on the gearlever.Up to now the switch has been working correctly in 4th gear.Today while driving, it seems that its working in reverse.When I select "in" for overdrive the revs go up,and when I select"out" the revs drop.I had the centre consul/armrest off recently for some work,and I was wondering if I had interfered with some wiring.Any advice much appreciated.Joe.

Hi Joe
The overdrive switch is not a changeover switch, it is a simple ON-OFF switch.
My guess is that you have put it back together upside down.

Turn the entire gear knob so it appears to be upside down,
and then remove the top cover and fit it the right way up.

Problem solved.

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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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