How to: Speedometer Gear Color Code Specification Chart With Formulas, And Ford Part Numbers.

This website sells speedometer gears: WWW.LowPriceGears.Com. Special thanks to our member Paraphoe (Jason) for posting it in another thread: http://www.explorerforum.com/forums/showthread.php?t=188485. Here's another site: http://www.odometergears.com/ford.html.

I was thinking...if changing tire size throws off the speedometer, then it'll affect the odometer too, right? Also throwing off any mpg calculations we might make, huh? Will changing this gear on mine fix both problems? Thanks for the help.

The gear will affect the speedometer, odometer, and shifting pattern of the transmission. Later madel vehicles don't use a gear anymore. They need to be reprogrammed. Here is a link for the 98-01: http://www.explorerforum.com/forums/showthread.php?t=146122

I was looking at the instructions, but I'm still not sure where I should look exactly for the speedometer gear on my 97' XLT manual. A pic would be great, or at least a little bit of direction. Thanks for the help.

Here's a picture from Glacier991's photo gallery of the part on a BW 1354 transfer case where the drive gear is located:
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The speedometer gear is on the end of the VSS, and makes contact with the drive gear. Notice the opening on the lower left hand side of the picture. This is what it looks like when it goes into the housing:

Drive gear (6, 7, or 8)

Ok well I found the speedometer drive gear and mine is the pink one with 19 teeth. The guy at Low Price Gears still says he needs to know what my drive gear is. It's supposed to be either 6, 7, or 8, but I'm not sure where to find it since my 97 doesn't have a speedometer cable, just the sensor with the 19 gear attached. I also have a D4 axle with 3.73 gear ratio. Anybody have any idea where I can look to find the drive gear? This is the email I got back from Low Price Gears:

Bill, Your 19 tooth gear that's pink is your speedometer gear. I need to know the tooth count of the gear that's on the other end of the cable, that will be 6, 7 or 8 teeth. Without knowing your tooth count for your drive gear, I can only narrow it down to 3 possibilities:

Manual Transmission:
3.73:1 axle ratio with
31.00 inch diameter tire and
6 tooth drive gear
RECOMMENDATION: Burgundy 16 tooth driven (SPEEDOMETER) gear.

Manual Transmission:
3.73:1 axle ratio with
31.00 inch diameter tire and
7 tooth drive gear
RECOMMENDATION: White 17 tooth driven (SPEEDOMETER) gear.

Manual Transmission:
3.73:1 axle ratio with
31.00 inch diameter tire and
8 tooth drive gear
RECOMMENDATION: Pink 19 tooth driven (SPEEDOMETER) gear.

Thanks for any help anyone can come up with for me.

These 2 pictures of the inner drive gear (# 17285 in post # 25 above) from Glacier991's photo gallery might help you visualize what the technician from low price gears was referring to:

Ok, so if I pull the VSS back out, the gear I'm looking for is what my 19 tooth gear fits into? Is it labeled or do I just count the threads? How do I determine if it has 6, 7, or 8 teeth? Thanks again, Brooklyn.

I don't know if the drive gears are color coded like the VSS gears. I guess you could count the grooves.

yes or no?? help please....

I am showing with going with a 16 that I would still be off 4mph (give or take) is this correct? 17*60/67=15.22388infinity (mph diff. from here
http://www.1010tires.com/TireSizeCalculator.asp?action=submit
225/70r15 to 31/10.50r15
is there a 15 tooth gear?? or would the 16 do the trick?

ozone11@cinci.rr.com

They don't make a 15 tooth gear.

This thread has a list of online calculators: http://www.explorerforum.com/forums/showthread.php?t=202810

Informative write up!
Thanks!

Welcome to this forum! Each thread gives you an option in the upper right hand corner to rate them. There are 1 through 5 stars to choose from.

...I just added this to my thread...
http://www.explorerforum.com/forums/showthread.php?t=216933

Here's a source for those hard to get odometer gears: http://www.transmissioncenter.org/Odometer_Gears.htm

Hello sorry to hijack the thread, but I am just changing My VSS in 96 Explorer 4X4 with a Manual and my gear doesnt seem to be on that chart, Ford cant find it ceither. Its a 19 tooth RH (Right Hand) and is orange kinda, I got a pic but not sure how to attach it5. Any info would be great as far as a part number for FOrd. Can I send someojne a pic to post or attach...

<----...Yes, I will post it for you...go to my name at hotmail...

Tbar you got mail and thanx bro.

lol I tried to use it as my profile pic, but then everyone would have to check my profile to see the picture of the gear.