speedometer gears
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speedometer gears
Hey all, I need some assistance in regards to replacement speedometer gears. I have replaced my speedo, cable and the small gear on the end of the cable, but apparently I need a new gear that goes inside the tranny. Can anyone point me in the direction to get this part? It drives me nuts having my speedo not working.
Mike
Mike
Ford Parts Specialist
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From: Simi Valley, CA
Hey all, I need some assistance in regards to replacement speedometer gears. I have replaced my speedo, cable and the small gear on the end of the cable, but apparently I need a new gear that goes inside the tranny. Can anyone point me in the direction to get this part? It drives me nuts having my speedo not working.
Mike
Mike
What is: the year, series (F100, F250, etc) and the rear AXLE ratio?
Your profile sez: 1970 F100, is that what you want the gear for? There are 5 different gears listed for this year and model.
Without knowing the rear AXLE ratio, I can't help you.
List the info, I'll see what I can find.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Mike It is a little odd for it to stop working if it once was. Did you purchase a new gear already? They have left hand and right hand twists. Tis my understanding the autos have right hand twist and manuals have left hand twist. All of the auto gears that I have seen are right hand twist.
Bill will have to get you a part number. I pick them up when yarding so I never need a part number.
John
Bill will have to get you a part number. I pick them up when yarding so I never need a part number.
John
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Hey guys,
It is a 1970,f-100. It has 3.5:1 axle gears. I have replaced everything for the speedo except the drive gear inside the tranny that goes on the output shaft. That was a part that I didn't know you even had to replace. I put my finger in the hole for the speedo cable and the gear felt like it had worn in the middle as it was contoured or something. I'm new at working on these old fords and not having a repair manual makes it a lil more difficult. My truck has a NP435 w/ a Dana 21 TC If that makes any difference. Thanks, Mike
It is a 1970,f-100. It has 3.5:1 axle gears. I have replaced everything for the speedo except the drive gear inside the tranny that goes on the output shaft. That was a part that I didn't know you even had to replace. I put my finger in the hole for the speedo cable and the gear felt like it had worn in the middle as it was contoured or something. I'm new at working on these old fords and not having a repair manual makes it a lil more difficult. My truck has a NP435 w/ a Dana 21 TC If that makes any difference. Thanks, Mike
Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
================================================== =============================================
C3OZ-17285-C .. 7 Tooth Drive Gear (located on the output shaft) // C3OZ-17285-C > > replaced > > C2OZ-17285-D.
-------------------------------------------------------------------------------------------------------------------------
C0DD-17271-B .. 18 Tooth Driven Gear (located on the end of the speedo cable).
------------------------------------------------------------------------------------
John: The 3 speeds (not w/ O/D), some 4 speeds and the autos use driven gears that slant //// this-away.
This is one of them.
BTW: ALL the driven gears are still available from Ford.
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Hey numberdummy thank you very much for the info. I'd return the favor but you know more than I do, haha. Thanks again, Mike
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oh yeah I wasn't sure about the gears, I decoded it and all I found was 3.5:1. I know my truck has the original drivetrain so I will go with the gears you say. I got my info from another ford site. It has an axle code of 08
Mike
Mike
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Ford Parts Specialist
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From: Simi Valley, CA
08 = Ford 9" / 3.50-1 / non LS / 3300 lb. Rear Axle Capacity / Parts List #91
Parts List #91: C90Z-4209-A .. RIng & Pinion Kit-3.50-1
1964/72 Ford Truck Parts Catalog / Speedo Gear Chart / Section 172 / Page 18 sez:
1967/71 F100 4WD / NP435 / 3.54-1 / C3OZ-17285-C .. 7T Drive Gear / C0DD-17271-B .. 18T Driven Gear.
that's Ford for ya...
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