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I was rebuild my motor on a 75 f250 and I was wondering how to roll back my mileage back to zero so I can keep track on how many mile are on the new motor
I would think that is highly illegal to do that. And not a very honest thing to do. You have good intentions but why not write the mileage down and put it somewhere safe and keep track that way
Yup, like others have said, regardless of intentions, it is very illegal to roll back the odometer, this is actually a federal offense.
Even when you buy a new speedometer, the 10ths digit is red instead of black so you can tell that the speedometer has been replaced.
There's an entire wing at the Florida SuperMax Prison dedicated for inmates convicted of rolling back Odometers. Nissan Sentras mostly, but a few Ford's and Chevy's too. Tough hombres, too. Nobody messes with 'em. Word to the wise.
Personally, I always install an hour meter with a new or rebuilt engine... having been raised on a farm, hour meters are the norm and in my opinion are more accurate for maintenance schedules.
My title and registration has "EXEMPT" printed in the mileage block. So, while I agree with the others for general purpose, it may not matter for classic vehicles in some states. After all I really don't know if I have 86K, 186K or 286K miles on my truck.
However, the insurance company sends me a questionnaire every year asking the mileage to validate I don't drive it much. So, when I installed a replacement odometer, I pushed the pin out and reset the number dials to match the old one. Then re-inserted the pin. It takes some fussing to get the numbers to line up, but can be done. This can also be done just to line up the numbers because they get off after it rolls over.
If you purchase a new odometer, it will actually come with directions to change the mileage to match your current actual mileage by pulling the pin. A new one is another option. Try here. Might as well upgrade to 100 mph with that fancy new motor.
Thanks for all the replies but on a legal stand point I don't think it would matter since the odometer rolls over at 99000 so you will never know the true mileage
As long as there is no intent to defraud and you clearly disclose that the odo has been altered, I am not sure there is an illegal act involved given that at 40 years old, very few of our trucks have sufficient documentation to say whether the mileage showing is original anyway. I'd vote for recording the mileage at the point of engine replacement and leaving it at that - that is not the only component you want to track, and you didn't rebuild or replace the transmission, diff, etc. did you?