Mike,
I agree with all said below, but I will add that you can add lubricant to
the cable and that often helps what ever is causing your particular problem.
Just unscrew the cable from the housing on the rear of the speedo and pull the
drive element out of its case. Grease it up and slide it back in, easy to
say but sometimes it takes a number of tries to get it all the way back in.
Do not grease within about 8-10 inches of the speedo to keep grease from being
sucked in, a bad thing. What you use for the grease is the subject of some
debate, but I've used lithium grease to good effect.
Jay Donoghue
72B-GT
66Mustang
In a message dated 1/7/2005 12:13:53 P.M. Eastern Standard Time,
jello@ida.net writes:
This is a pretty common problem. It is usually attributed to the
speedometer cable and/or the angle drive (if you have one). My past
experience is that you can correct it with a new speedo cable, but that
cable goes through a lot of twists and bends, and it will happen again
probably within a year.
To be really clear on it - the cable goes out the speedometer through the
firewall toward the front of the car, down one side or the other of the
transmission (it is most commonly routed around the bell housing and to
the passenter side, toward the back of the car, and finally into the
transmission (sometimes through an angle drive before the transmission)
about as far back as where you sit. That's a lot of twisting and turning,
and one kink once will make the needle go wobbly.
Phil Bates
> All,
>
> The speedo needle on my '80 MGB tends to bounce around a 10mph range of my
> actual speed. It's more pronounced when I'm traveling over 30mph. I
> recall our '66 B did the same thing when we owned it in the early '70s.
> Is this a common problem and can it be fixed (by me) easily?
>
> Thanks,
> Mike
> '80 MGB
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