RRC Odometer is goofy.

Ohlins · Sunday at 13:17

Aft'noon
Perhaps someone can assist with a speedo problem on my RRC 1993 3.9V8 manual. I'm the second owner and it has only 107000kms with the odometer working OK since I bought it with 99000kms on it.

The speedo is working but the odometer is not. I tried a search over the least few days to no avail. The rev' counter does do the odd bit of a hop about periodically.

Any thoughts would be apppreciated.

Thanks

norseman · Sunday at 14:29

Based on my own experience ('87 3.5efi) failure of the odometer is a prelude to the speedo itself developing a very 'wavy' needle, which will result in MOT failure when the time comes. I've attempted to have mine repaired but the specialist was unable to source the parts so they returned the unit to me without charge, though it did cost me £12 in two-way postage charges.
I have spoken to Speedy Cables who claim to be able to effect a repair, but I wonder if they will have any better luck with parts? Thinking about it, the fact that yours will be electrically driven whereas mine is cable may mean you have better luck with a repair.

nb. vintage speedos can be repaired as can modern digital, but the 'in-between' eras seem to be a problem.
A new, presumably aftermarket, unit is around £400 from Rimmer Bros. or Famous Four.

If I have any luck I will post, perhaps you'd be good enough to do the same?
Nice to converse with another 'proper' RR owner

Ohlins · Sunday at 15:19

Thank you kind Sir for your prompt reply......yes a proper Lucas Prince of Darkness RR.....

I can find articles about the speedo not working but not a goofy odometer.

.

Hicap phill · Sunday at 16:25

Is the trip reading still working?

Ohlins · Sunday at 16:41

Hello
The trip is not working either.

Datatek · Sunday at 17:05

Ohlins said:
Hello
The trip is not working either.

I don't know your car, but on Volvo's it was the sort of ratchet mechanism that advanced the counter getting gummed up that stopped it working. A wash out with contact cleaner followed by a little clock oil sometimes fixed the problem.

Hicap phill · Sunday at 19:55

Ohlins said:
Hello
The trip is not working either.

Iv had an early RR where the oil has gone back up the speedo cable.
Have a check… unless you have the later transducer driven speedo

Ohlins · 2025-06-02T15:16:09+0100

Thank you all.....I'll check to see if there even is a cable coming out of the gearbox.....I'll wait until the pesky rain stop!

norseman · 2025-06-02T22:37:28+0100

I'm confident you will have a transducer, not a cable.

Ohlins · 2025-06-03T08:36:00+0100

Thanks.....I'd say so as the speedo needle is not hopping around...grrrr...I'll have a wee peep later....grrrr.

RRC Odometer is goofy.

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