rolling back or ahead the speedo mileage - The 1947 - Present Chevrolet & GMC Truck Message Board Network

wazzabie · 10-06-2021, 07:12 PM

My speedometer is broken. I found one in the junk yard but it does not have the same mileage. Is there an easy way to change the mileage?

Just call me Sean · 10-07-2021, 07:45 PM

Yes, the factory makes it very easy to commit odometer fraud.

TrailerTrash · 10-07-2021, 09:07 PM

Take the broken one apart. It isn't hard to figure out how to... adjust milage

**old Rusty C10** · 10-08-2021, 10:01 AM

technically its against the law to mess with an odometer, there are licensed shops that make these adjustments, however you will see how to take one apart if you want to adjust the replacement one

Just call me Sean · 10-08-2021, 10:41 AM

Pretty sure there needs to be intent to commit fraud for it to be against the law.

Bloodhound · 10-08-2021, 10:44 AM

Quote:

Originally Posted by Just call me Sean

Pretty sure there needs to be intent to commit fraud for it to be against the law.

Exactly. I just set the mileage on my new Dakota Digital gauges (to the correct mileage). Same difference.

kipps · 10-08-2021, 03:15 PM

Quote:

Originally Posted by Just call me Sean

Pretty sure there needs to be intent to commit fraud for it to be against the law.

Agree with this. Besides, most of these trucks no longer have the mileage reported on the titles, since the odometer has rolled over at least once.

As best I can tell, this same thing applies to moving a VIN from one cab to another. Highly illegal if your intent is wrong, but there are legitimate ways of doing it for restoration purposes.

**hatzie** · 10-10-2021, 07:58 PM

I've matched mileage of repaired replacement digital clusters to the old otherwise damaged and not repairable old ones that still had readable chips. The intent was to make sure I was not changing the mileage. If I caught the wrong overzealous prosecutor they could probably still stitch me up for doing that.

If the odometer was stalled on the old speed head the mileage is already no longer accurate. If it's cleared 100,000 miles or you're not sure whether it's cleared that number you're obligated to check the exceeds mechanical limits or does not reflect actual mileage box on the odometer paperwork.
In that case I wouldn't bother with trying to match the new odometer to the old one. Something else to consider is the likelihood that the odometer gears are quite brittle with age. You run the very real risk of damaging your good replacement odometer.

I'd take the dead speed head apart and play with it to figure out how it works.

wazzabie · 10-10-2021, 09:54 PM

It was run for a year or so with the broken spedo not registering. I know roughly what the millage is. On something this old it is exempt anyways. It would be nice to know how many miles till next oil change.

**hatzie** · 10-11-2021, 10:09 AM

Quote:

Originally Posted by wazzabie

It was run for a year or so with the broken spedo not registering. I know roughly what the millage is. On something this old it is exempt anyways. It would be nice to know how many miles till next oil change.

If you have a working replacement speedometer/odometer then just install it and run it.
As you said it's for maintenance intervals not for telling how many miles are actually on the chassis now. That ship sailed as soon as it was driven with a stalled odometer.
When or if you sell it you just tick that box that says the odometer doesn't reflect the actual mileage or something similar and include that in the verbiage of your bill of sale or separate odometer statement.

10-06-2021, 07:12 PM	#1
wazzabie Registered User Join Date: Dec 2011 Location: WA Posts: 378	rolling back or ahead the speedo mileage My speedometer is broken. I found one in the junk yard but it does not have the same mileage. Is there an easy way to change the mileage?

10-07-2021, 09:07 PM	#3
TrailerTrash Registered User Join Date: Jun 2015 Location: PA Posts: 441	Re: rolling back or ahead the speedo mileage Take the broken one apart. It isn't hard to figure out how to... adjust milage __________________ - When the Reaper makes his deal, trust in your steel - '77 C10 350/350 2/4 drop and a mild street engine

10-08-2021, 10:01 AM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	Re: rolling back or ahead the speedo mileage technically its against the law to mess with an odometer, there are licensed shops that make these adjustments, however you will see how to take one apart if you want to adjust the replacement one __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

10-10-2021, 07:58 PM	#8
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: rolling back or ahead the speedo mileage I've matched mileage of repaired replacement digital clusters to the old otherwise damaged and not repairable old ones that still had readable chips. The intent was to make sure I was not changing the mileage. If I caught the wrong overzealous prosecutor they could probably still stitch me up for doing that. If the odometer was stalled on the old speed head the mileage is already no longer accurate. If it's cleared 100,000 miles or you're not sure whether it's cleared that number you're obligated to check the exceeds mechanical limits or does not reflect actual mileage box on the odometer paperwork. In that case I wouldn't bother with trying to match the new odometer to the old one. Something else to consider is the likelihood that the odometer gears are quite brittle with age. You run the very real risk of damaging your good replacement odometer. I'd take the dead speed head apart and play with it to figure out how it works. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

10-10-2021, 09:54 PM	#9
wazzabie Registered User Join Date: Dec 2011 Location: WA Posts: 378	Re: rolling back or ahead the speedo mileage It was run for a year or so with the broken spedo not registering. I know roughly what the millage is. On something this old it is exempt anyways. It would be nice to know how many miles till next oil change.



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