Mgb speedometer

[Norrie mccredie]

My speedometer on my mgb reaches 40 mph. But will go no further no-matter what speed I do.
Any suggestions would be welcome.

[Jim Haines]

If it runs up to 40mph it suggests that the speedo cable is fitted and working reasonably correctly, and the problem is therefore with the speedo. You could try a small amount of lubrication down the cable from the speedo end, but I would have thought you really need a new speedo head.
Make sure you get the right one - there is more than one type out there.......

[Norrie mccredie]

Thanks Jim , I will take your advice and have the speedo checked out first.

[Peter Cresswell]

Hi Norrie,
Getting the speedo head checked might prove to be as expensive as getting it overhauled. Either way these people will be able to help you:
http://www.speedycables.com/
or
http://www.jdo1.com/
These people might take a look at it and knock the cost of the investigation off the overhaul if you go ahead.

If you buy a new one then it might be worth considering keeping the old one so you can verify the mileage. A new one or an overhauled one is likely to much the same price!

[Norrie mccredie]

Thanks for the info peter, much appreciated!