speedo and weight?
Cargo Master
Joined: Mar 2006
Posts: 2,789
Likes: 5
From: Sand GAp, KY
You can get one along with the speedo cable from a yard. Problem is that you need the right colored gear. There a several differnt colors and they are matchedto the gear inside for the gear ratio that the truck rear has. It would work but it may not read right (be off fast or sow).
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Senior User
Joined: Jul 2008
Posts: 251
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From: somerset
i think it is a state thing 3 auto parts stores told me that. pa has some of the bumbest laws i ever herd. i think it is because of people messing with the odometer or something. little do they know i am certified...in redneck engeneering.. but that certification doesnt pay mutch.
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Senior User
Joined: Jul 2008
Posts: 251
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From: somerset
does any one know what color gear i need? i am not really shure of the gearing in the truck, all i know is really low i am thinking 4.56 if that ever came stock.drove a 89 f-250 with 4.11's and it wasnt that low.
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From: somerset
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
The B-Pillar tag axle info is whats needed ... I would recommend going to your local Ford stealership for the gears, however here is the problem, you must know what DRIVE gear is in the Transfer case and if it's any good.
One of two ways to know that ... Physically count the teeth or replace them as a matched set. To get a matched set all you need to know is what transfercase, rear gears and tire size.
The driven gear (goes on the cable adapter) is just a few dollars, the drive gear is a bit more ... for my 1345 it was $33.
If you need an image of the cable adapter and driven gear I can get one...
-Enjoy
fh : )_~
One of two ways to know that ... Physically count the teeth or replace them as a matched set. To get a matched set all you need to know is what transfercase, rear gears and tire size.
The driven gear (goes on the cable adapter) is just a few dollars, the drive gear is a bit more ... for my 1345 it was $33.
If you need an image of the cable adapter and driven gear I can get one...
-Enjoy
fh : )_~
Posting Guru
Joined: Jan 2010
Posts: 1,665
Likes: 4
From: Terre Haute, IN
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Posting Guru
Joined: Jan 2010
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From: Terre Haute, IN
According top this chart (Ford Axle Code Chart .: Articles), your axle is a 3.55 6250lb Ford made axle, non-LS.
Mine is also a 3.55 (LS) and i think i have a maroon colored gear.
Mine is also a 3.55 (LS) and i think i have a maroon colored gear.
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Here is more info than you want to know about speedo gears.
Pictures of what you should have.
Calculators for what gears you need.
But you still have to know what the axle ratio is.
If it is any help, 95% of the diesel pickups had either 3.55 or 4.10 gears from the factory.
But with a previous owner, who could have changed the ratios, what is on the door tag may mean nothing.
Non limited slip, jack up one rear wheel.
Put a mark on the drive shaft and the tire.
Rotate the tire one full revolution while counting the driveshaft revolutons.
Divide by 2.
Example, one revolution of the tire makes the driveshft turn just a bit over 7 full revolutions, 3.55
One revolution of the tire makes the driveshft turn almost 8 1/4 turns, 4.10
If you have a good limited slip, both rear tires turn together, jack up both rear wheels.
One turn of the wheel and count the drive shaft revolutions.
You should get the ratio from the number of revolutions without dividing.
About 3.5 revolutions, 3.55
Slightly over 4 revolutions, 4.10
The other way, which is more precise.
Pull the diferential cover and count the teeth on the ring gear and pinion.
Divide ring gear teeth by pinion teeth and the answer is your ratio.
Pictures of what you should have.
Calculators for what gears you need.
But you still have to know what the axle ratio is.
If it is any help, 95% of the diesel pickups had either 3.55 or 4.10 gears from the factory.
But with a previous owner, who could have changed the ratios, what is on the door tag may mean nothing.
Non limited slip, jack up one rear wheel.
Put a mark on the drive shaft and the tire.
Rotate the tire one full revolution while counting the driveshaft revolutons.
Divide by 2.
Example, one revolution of the tire makes the driveshft turn just a bit over 7 full revolutions, 3.55
One revolution of the tire makes the driveshft turn almost 8 1/4 turns, 4.10
If you have a good limited slip, both rear tires turn together, jack up both rear wheels.
One turn of the wheel and count the drive shaft revolutions.
You should get the ratio from the number of revolutions without dividing.
About 3.5 revolutions, 3.55
Slightly over 4 revolutions, 4.10
The other way, which is more precise.
Pull the diferential cover and count the teeth on the ring gear and pinion.
Divide ring gear teeth by pinion teeth and the answer is your ratio.
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