speedo cable question
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Junior User
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speedo cable question
hey numberdummy or someone, i was wondering what the part number is for a new speedometer cable. Also i was wondering if the years mattered for the cable or just any one from 50-70 would work.
Also my speedometer is about 10 miles off once i get to a certain speed, figuring im needing a new gear, can someone tell me how many teeth the gear i need has? stock 292, stock 3spd manual tranny, all stock...
thanks guys
Also my speedometer is about 10 miles off once i get to a certain speed, figuring im needing a new gear, can someone tell me how many teeth the gear i need has? stock 292, stock 3spd manual tranny, all stock...
thanks guys
Post Fiend
Joined: Nov 2000
Posts: 6,060
Likes: 7
From: Glendale Arizona
10 up or down? Ypu need to pull the end out of the transmission and count the teeth.
Typically one up is good for five slower and one down is good for five faster.
These gears are avalible at your ford dealer or through various vendors.
A part number will do you jack unless you want NOS ford. Stroll to NAPA AutoZone or Checkers and get one. Just discern if your truck is a standard or auto or four wheel drive and the year, it is a common cable.
Garbz
Typically one up is good for five slower and one down is good for five faster.
These gears are avalible at your ford dealer or through various vendors.
A part number will do you jack unless you want NOS ford. Stroll to NAPA AutoZone or Checkers and get one. Just discern if your truck is a standard or auto or four wheel drive and the year, it is a common cable.
Garbz
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
1963/64 F100/250 2WD Speedo Cables
Originally Posted by tx64f100tx
hey numberdummy or someone, i was wondering what the part number is for a new speedometer cable. Also i was wondering if the years mattered for the cable or just any one from 50-70 would work.
Also my speedometer is about 10 miles off once i get to a certain speed, figuring im needing a new gear, can someone tell me how many teeth the gear i need has? stock 292, stock 3spd manual tranny, all stock...
thanks guys
Also my speedometer is about 10 miles off once i get to a certain speed, figuring im needing a new gear, can someone tell me how many teeth the gear i need has? stock 292, stock 3spd manual tranny, all stock...
thanks guys
Make sure to lightly grease the new core (white lithium grease) when installing it in the housing.
Dry cores are the MAJOR reason why they snap.
1961/64 F100/250 2WD Speedo Cable & Housing (all are obsolete)
C3TZ-17260-BY = 60.00" -long = Ford 3 Speed all Syncro Transmission
C3TZ-17260-Y = 77.00" -long = Warner T89C 3 Speed; Warner T98A 4 Speed
C3TZ-17260-AA = 63.00" -long = Warner 3 speed O/D; FOM or COM A/T.
In order to determine what the driven speedo gear (end of cable) the truck has, count the number of teeth. Otherwise, the tire size, rear axle ratio and the type of engine/transmission must be known to figure out what teeth the gear is supposed to be.
NOTE: Both fiber & plastic driven gears were used, it depends on the application.
Most of the plastic gears are still available from Ford. There are two types. Some go this a way: / Some go that a way: \. The fiber gears are obsolete.
Last edited by NumberDummy; Nov 28, 2007 at 06:23 AM.
Tuned
Joined: Mar 2007
Posts: 317
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From: Sabin, Mn
ok. i was just reading through this post and I have a question. I've pulled my speedo cable gear (the one thats removable)out of the trans and mine seems to be metal. no plastic or fiber. havent actually tested it to see if it is metal or not. did they ever use metal gears???????? was this somthing special.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Originally Posted by 64fordf100292
ok. i was just reading through this post and I have a question. I've pulled my speedo cable gear (the one thats removable)out of the trans and mine seems to be metal. no plastic or fiber. havent actually tested it to see if it is metal or not. did they ever use metal gears???????? was this somthing special.
I need the gear ratio, tire size, engine size and tire size to figure out what driven gear you need.
Freshman User
Joined: Oct 2007
Posts: 36
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From: Midlothian, Texas
LOL, so If I'm running a 500 CI motor
[QUOTE=I need the gear ratio, tire size, engine size and tire size to figure out what driven gear you need.[/QUOTE]
It somehow affects the gear ratio / tire diameter and makes the speedometer read off
It somehow affects the gear ratio / tire diameter and makes the speedometer read off
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Tuned
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Ford Parts Specialist
Joined: Nov 2006
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From: Simi Valley, CA
LOL...if I'm running a 500ci motor..
Originally Posted by jyro
It somehow affects the gear ratio / tire diameter and makes the speedometer read off
The rear axle ratio (there are at least 8 possibles), type of transmission (there are 5 possibles), tire size (sizes: 6.70-15, 7.10-15, 7.60-15, 8.00-15 & 8.15-15 were available) and the cid of the engine must be known to get the right gear.
The are 15 possible speedometer driven gears and 8 output shaft drive gears.
You want your speedo to read correctly, you need the info above..otherwise you're SOL.
Last edited by NumberDummy; Dec 2, 2007 at 01:06 AM.
Freshman User
Joined: Oct 2007
Posts: 36
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From: Midlothian, Texas
so you're using engine size to determine what the tranny mainshaft tooth count maybe?
I can't see the engine size affecting anything on the speedometer calibration.
My combo is a 1966 f-100 351w 3.73 gears 255x70x15 c-6 with a 23 tooth gear, it reads about 10 mph low at 65, go with a 21?
My combo is a 1966 f-100 351w 3.73 gears 255x70x15 c-6 with a 23 tooth gear, it reads about 10 mph low at 65, go with a 21?
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
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From: Simi Valley, CA
Originally Posted by jyro
I can't see the engine size affecting anything on the speedometer calibration. if Ford didn't ask about engines sizes inre to speedo gears, I wouldn't need to ask either.
My combo is a 1966 f-100 351w 3.73 gears 255x70x15 c-6 with a 23 tooth gear, it reads about 10 mph low at 65, go with a 21?
My combo is a 1966 f-100 351w 3.73 gears 255x70x15 c-6 with a 23 tooth gear, it reads about 10 mph low at 65, go with a 21?
Last edited by NumberDummy; Dec 2, 2007 at 06:07 AM.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Originally Posted by jyro
now, what's a "cattle hack engine"?
You made a ref to a 500 cid engine, this is the only one I could think of.
Slang: Cadillac = Cattle-Hack
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