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MG Car Repair/Tachometer sticking?


I noticed on my 74 B that the tach stopped working past 3000. It works up to that but as go past 60 mph the tach freezes at 3000 ( Overdrive engaged ) - accelerating to 65 and faster-  it remains at 3000. Is there a fix for this?

thanks Pauk

Hi Paul

I notice that you say '(Overdrive engaged)'.

If the tachometer will not read above 3,000 then this should happen in every gear (with and without the overdrive engaged).  This can be tested whilst stationary in neutral, and usually indicates a faulty tacho gauge.  

If the problem only occurs with the overdrive engaged, then you have a different problem.

Unfortunately, there are very few parts inside a tacho that can be repaired.  I have seen cases where the spindle of the needle is bent, so the needle sticks to the face of the gauge.  Sometimes careful bending of the shaft and/or the needle can fix this.

Please let me know what you find.

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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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