Advancing replacement speedometer to match car mileage

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Boris61
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Your car is a: 1984 Pininfarina
Location: Indiana

Advancing replacement speedometer to match car mileage

Postby Boris61 » Tue Oct 04, 2016 8:52 pm

I'm planning to replace my 84's soeedometer with a 140mph model from a 79. I'd like to advance it to the correct mileage (+ ~20k mi). Do I just hook up a drill and let it whirr until it catches up? Any advice from folks that have done this would be appreciated.

bobplyler
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Your car is a: 1979 spider 2000
Location: Charlotte, NC

Re: Advancing replacement speedometer to match car mileage

Postby bobplyler » Tue Oct 04, 2016 10:50 pm

You can remove the seal (it's just wire twisted with a lead seal), and take the speedometer apart.

I did this in 1980 when my car was 1 year old and had 40000 miles. It then had 14000 miles.
1979 Fiat Spider (since new)
2005 Lincoln LS (the wife's car)
2003 Chevrolet Cavalier (daily driver)
1999 Honda Shadow VLX 600
1972 Grumman Traveller 5895L (long gone).

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focodave
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Your car is a: 1980 Spider 2000 F.I.
Location: Fort Collins, CO

Re: Advancing replacement speedometer to match car mileage

Postby focodave » Tue Oct 04, 2016 11:16 pm

Boris61,
I swapped the speedometer in my 1980 Spider with a 140MPH unit from a 1978 Spider.
It was very easy to reset the new odometer mileage to match the mileage on the old odometer by taking the new unit apart and following the procedure in this video (the video is for a Ford Mustang but the same method applies to the FIAT unit): https://www.youtube.com/watch?v=87kZQkKGSw8
Worked like a charm....
1980 Spider 2000 F.I. (my hobby)
1970 MGB GT (my other hobby)
2008 Ford Expedition (daily driver)
2019 Harley-Davidson Electra Glide Standard
2019 Harley-Davidson Iron 883 Sportster

Boris61
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Your car is a: 1984 Pininfarina
Location: Indiana

Re: Advancing replacement speedometer to match car mileage

Postby Boris61 » Wed Oct 05, 2016 10:12 pm

Thanks! That should make it easy...


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