Speedometer Gear
Thread Starter
|
Senior User
Joined: Jun 2010
Posts: 347
Likes: 0
From: Kempner/Waco, TX
Speedometer Gear
I have 1969 F250 4x4 with 4.10 gearing in the rear. I put on some 35 inch tires, and i was wondering what speedometer gear would get me close to a stock reading on the speedometer.
Much Thanks
Mike
Much Thanks
Mike
Posting Guru
Joined: Aug 2005
Posts: 1,069
Likes: 1
.83 % of 4.10 is 3.40.
Fleet Mechanic
Joined: Oct 2005
Posts: 1,369
Likes: 7
From: Gainesville, GA
With the bigger tires your speedo is reading slow so to speed it up you need more teeth on the gear.
Trending Topics
Thread Starter
|
Senior User
Joined: Jun 2010
Posts: 347
Likes: 0
From: Kempner/Waco, TX
Thank you now one last question. Could I grab one of these from any local auto parts store or from a ford dealership.., or do I have to order it from some where on line.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Junior User
Joined: Sep 2010
Posts: 52
Likes: 0
LMC Truck Parts - Page 47
You might want to call them, they probably know which one will get you close to correct reading on the speedometer.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Ford has used the same nylon speedometer DRIVEN gears (end of the cable) since 1960. 16 thru 21 teeth are available.
The MSRP's range from $2.02 thru $4.00 each. These gears are held to the cable with a C clip (C1DD-17292-A).
The problem is: When looking these gears up in the 1964/72 truck parts catalog, the only tires listed are the original bias ply type. No radials or P-Metrics are listed.
Radial tures were not factory installed until the 1980's.
The MSRP's range from $2.02 thru $4.00 each. These gears are held to the cable with a C clip (C1DD-17292-A).
The problem is: When looking these gears up in the 1964/72 truck parts catalog, the only tires listed are the original bias ply type. No radials or P-Metrics are listed.
Radial tures were not factory installed until the 1980's.
Senior User
Joined: Sep 2008
Posts: 311
Likes: 1
From: Waterdown, Ont.
mjshagnasty,
I'm no math genius, but it seems to me that if your speedo is reading low you would want a smaller diameter (less teeth) driven gear. Please correct me if I'm wrong. My other concern is that Ford may not have anticipated people putting tires of that size (35's) on the truck. Consequently, the smallest (16 teeth) may still not be small enough to correct the speedo error.
Just my 2 cents...
John
I'm no math genius, but it seems to me that if your speedo is reading low you would want a smaller diameter (less teeth) driven gear. Please correct me if I'm wrong. My other concern is that Ford may not have anticipated people putting tires of that size (35's) on the truck. Consequently, the smallest (16 teeth) may still not be small enough to correct the speedo error.
Just my 2 cents...
John