Need to rollback odometer

tca7291 · Mar 10, 2013

As the story goes, I was able to find a Ford motorsports 160mph speedometer, and I want to put my actual mileage on it without breaking it. My current 85mph (car is an '87) displays 12xxx miles, and my new 160mph unit is displaying 37xxx miles, and well, I don't want to have to leave it hooked up to a drill for a month to make it roll over again. Any ideas? Thanks.

RsStanG1987 · Mar 10, 2013

Took me 20 minutes with a drill to move it like 20k back to match in my 87

tca7291 · Mar 10, 2013

Will running the drill backwards roll the odometer back? I always thought that it would only ever register going forward.

RsStanG1987 · Mar 10, 2013

I rolled it forward my gt had like 110k on it and the speedo said 92 so I just rolled it forward

madspeed · Mar 10, 2013

yep, backwards works too

tca7291 · Mar 10, 2013

Like this?

J/K, seriously though, still open for ideas! Thanks madspeed!

mikestang63 · Mar 10, 2013

Must be why so many people selling 20 year old stangs say they have 50K miles on them...lol

7991LXnSHO · Mar 10, 2013

madspeed said:
yep, backwards works too

How many of us will be going around town in reverse now? This could get exciting if there was track money up for grabs for 1/8 mile reverse runs!

RsStanG1987 · Mar 11, 2013

7991LXnSHO said:
How many of us will be going around town in reverse now? This could get exciting if there was track money up for grabs for 1/8 mile reverse runs!

I'm not sure reverse works on the speedo gear

tca7291 · Mar 11, 2013

BTW, was this stock on special ordered vehicles, or was it a Ford aftermarket part?

View attachment 133137

Mustang5L5 · Mar 11, 2013

Quicker way to do it is to remove the idler pin on the backside of the odometer, and roll the numbers to where they should be and reinstall.

BUT, be careful of this method as the idler wheels need to install a certain way. If you do this., take pics in case you mess up the order.

madspeed · Mar 11, 2013

yeah i tried that once and failed miserably

madspeed · Mar 11, 2013

RsStanG1987 said:
I'm not sure reverse works on the speedo gear

go test it

tca7291 · Mar 11, 2013

So, I have an old 90-93 2.3 speedo that I thought I would play with to get some ideas. I am assuming the 87-89 isn't that different from the 90-93 speedo. Well, I found that the drill method (driving the hub that the speedo cable normally drives) is going to take FOREVER!!! Also, I found that driving it in reverse will not work, as when the 1/10's get to zero, the drive gear will stop driving the reel. What I did find is that you can remove a little copper stop/retainer on the worm gear that is driven from the speedo cable and disengage it from the worm gear that drives the reels. From there you can spin the shaft that drives the reels easily. I put a small gear from one of my R/C cars in my drill, wrapped it with a rubber band, and I can run up about 100 miles per 10 seconds with this method. Now I just hope the 87-89 speedos are the same design!!!

Mustang5L5 · Mar 11, 2013

My '88s original speedo.

Swapped it for a 140.

Figured I'd reset it too while out

Sent from my iPhone 4S using Tapatalk

tca7291 · Mar 11, 2013

Sweet, yeah, that looks identical to the '90-'93 one I was playing with earlier. I also went ahead and pulled the idler pin and gears out and figured out how to reset it to 0. I wasn't comfortable messing with putting any other numbers in, but I did successfully reset it. That green gear/shaft is the one that I was talking about spinning with my drill. When I get my new speedo, I'll probably reset it to 0 and then run it up to match. Thanks for everyones help and input!!!

tca7291 · Mar 19, 2013

Did and done!!!

srtthis · Mar 20, 2013

mikestang63 said:
Must be why so many people selling 20 year old stangs say they have 50K miles on them...lol

nah thats cuz they rolled over....

1200gt · Apr 2, 2013

mikestang63 said:
Must be why so many people selling 20 year old stangs say they have 50K miles on them...lol

fUNNY mIKE!!! Believe it or not, my 1986 only has original 45,246 miles. Of coarse it sat in storage for the last 18 years!!! It still run fine though...

mikestang63 · Apr 2, 2013

1200gt said:
fUNNY mIKE!!! Believe it or not, my 1986 only has original 45,246 miles. Of coarse it sat in storage for the last 18 years!!! It still run fine though...

lol.. i hear ya. my 90 vert has just under 50K original miles too. I didn't believe it when I bought it 6 months go with 46k but I checked the title and carfax and it checked out. They are becoming very hard to find and if you do find one, people are pricing them like they are made of gold. I was looking at one a few months ago where the guy said it had 6X,XXX original miles and when I went to see it, I laughed my ass off. The first digit on the odometer didn't line up- an obvious sign it turned over- and the car looked like it had 26X,XXX miles on it. The easiest way to tell IMO is look for worn brake/clutch pedals. Scammers often overlook that when they try and make a car look newer with new carpeting, door panels, etc. Often they either forget to replace the pedal covers or take them off the brake and clutch.

Need to rollback odometer

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