Speedometer/odometer off
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theogre5150
Speedometer/odometer off
My speedometer reads 5 miles off (fast) and my odometer reads .01 off (fast). This happened when I replaced my transmission with a 4 spd od from an 86 f150 and a mph gauge from a 67 f600 dump truck. Thoughts?
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colnago
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Re: Speedometer/odometer off
I haven't dug that far down on my truck yet, but where does the speedometer attach? If it's the driveshaft, then it's either the F600 speedo, the gearing in the rear, or the tire size. I figure that if it's less than a 10% change, it's in the noise (it's off 5MPH, but at what speed?). If you know how to compensate your speed, then it shouldn't be a problem. If the odometer is off by 10 miles every 1000 driven, then it's also not enough to worry about. But then again, since my truck's fuel gauge goes down just sitting in the driveway, I can't afford to drive more that 5K miles a year!
Just my two cents,
Joseph
Just my two cents,
Joseph
"Sugar", my 1967 Ford F250 2WD Camper Special, 352FE, Ford iron "T" Intake with 1405 Edelbrock, Duraspark II Ignition, C6 transmission, front disc brake conversion.
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basketcase0302
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Re: Speedometer/odometer off
Eric,
If you remove the cable from the tranny you'll find a plastic gear on the end of the cable. I can't remember the way to calculate, (there is a way) but NPD and DC both sell the different gears to compensate for that-as well as for dealing with different tire sizes. Their different dolor-distinguished the different gear.
Once again here is "the pot calling the kettle black" as mine's been off since I built the truck a year or so ago. And I have three or four of these here.
If you remove the cable from the tranny you'll find a plastic gear on the end of the cable. I can't remember the way to calculate, (there is a way) but NPD and DC both sell the different gears to compensate for that-as well as for dealing with different tire sizes. Their different dolor-distinguished the different gear.
Once again here is "the pot calling the kettle black" as mine's been off since I built the truck a year or so ago. And I have three or four of these here.
Jeff
http://www.fordification.com/forum/view ... 22&t=46251
SOLD-71 F-350 dually flatbed, 302 / .030 over V-8 with a "baby"C-6, B & M truckshifter, Dana70/4.11 ratio, intermittent wipers, tilt steering, full LED lighting on the flat bed, and no stereo yet (this way I can hear the rattles to diagnose)! SOLD!
Many Ford bumps / one 76' EB / and several dents through the years.
A lot of "oddball" Ford parts collected from working on them for 34 years now!
2008 Ford Escape 4 x 4
http://www.fordification.com/forum/view ... 22&t=46251
SOLD-71 F-350 dually flatbed, 302 / .030 over V-8 with a "baby"C-6, B & M truckshifter, Dana70/4.11 ratio, intermittent wipers, tilt steering, full LED lighting on the flat bed, and no stereo yet (this way I can hear the rattles to diagnose)! SOLD!
Many Ford bumps / one 76' EB / and several dents through the years.
A lot of "oddball" Ford parts collected from working on them for 34 years now!
2008 Ford Escape 4 x 4
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1970 Hi-Boy
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Re: Speedometer/odometer off
Assuming you're not on bald tires or plan to increase tire size, count the teeth you have on your speedo gear, and order one with one more tooth than you already have. As big gears go slower than little ones. There is a great big long mathematical computation for all this as well, but darned if know how to go about it. I almost hate to bring this up, but mine too is 5 mph fast, but I plan on increasing tire size a bit, hopefully soon, which will compensate for it as well.1970 F250 Sport Custom 4x4 360 V8, otherwise known as the Hi Boy, and a Harley-Davidson.
1953 Lincoln SA200 portable welder with a 4 cylinder 1941 Continental F162 engine.
"If you think you can do a thing or think you can't do a thing, you're right." Henry Ford
1953 Lincoln SA200 portable welder with a 4 cylinder 1941 Continental F162 engine.
"If you think you can do a thing or think you can't do a thing, you're right." Henry Ford
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theogre5150
Re: Speedometer/odometer off
The gear I'm using is from the 86 f150. I have wanted to replace all of the gauges with new ones. If I do this, shouldn't the new speedo work properly?
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70_F100
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Re: Speedometer/odometer off
Wise men talk because they have something to say; fools talk because they have to say something.--Plato
Why is it that there's seldom time to fix it right the first time, but there's always time to fix it right the second time???
That's not an oil leak
That's SWEAT from all that HORSEPOWER!! 
Why is it that there's seldom time to fix it right the first time, but there's always time to fix it right the second time???
That's not an oil leak
That's SWEAT from all that HORSEPOWER!! -
1970 Hi-Boy
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Re: Speedometer/odometer off
NICE!1970 F250 Sport Custom 4x4 360 V8, otherwise known as the Hi Boy, and a Harley-Davidson.
1953 Lincoln SA200 portable welder with a 4 cylinder 1941 Continental F162 engine.
"If you think you can do a thing or think you can't do a thing, you're right." Henry Ford
1953 Lincoln SA200 portable welder with a 4 cylinder 1941 Continental F162 engine.
"If you think you can do a thing or think you can't do a thing, you're right." Henry Ford