speedo difference
Thread Starter
|
Cargo Master
Joined: Mar 2014
Posts: 2,031
Likes: 72
speedo difference
Been noticing that I seem to be running a little fast compared to other traffic around town.
So I took the truck on the Interstate to compare odometer to mile markers.
Basically for each real mile of travel, my odometer is reporting about .85 or close.
So is a close approximation essentially speed plus 15 percent? If that is the case my MPGs shows to be about 11.
Of course would like to correct it, but not a pressing matter. most of the driving is below 30-45 mph around town, so easily adjusted for. I thinking the correction is changing out the speedo gear in the tranny.
So I took the truck on the Interstate to compare odometer to mile markers.
Basically for each real mile of travel, my odometer is reporting about .85 or close.
So is a close approximation essentially speed plus 15 percent? If that is the case my MPGs shows to be about 11.
Of course would like to correct it, but not a pressing matter. most of the driving is below 30-45 mph around town, so easily adjusted for. I thinking the correction is changing out the speedo gear in the tranny.
Logistics Pro
Joined: Nov 2012
Posts: 4,308
Likes: 19
From: Las Vegas, NV
the gear on the end of the cable transmission side comes in 5 different versions to adjust the speedometer. I believe they are all still available from Ford. They will have more or less teeth. pull what you have to see witch way you need to go.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 787
From: Simi Valley, CA
Approx. 5-7 MPH difference for each of these gears. If the truck has P-Metric radials, the speedo will never read correctly.
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
2X Bill. The nylon gears are color coded. Different gears for Manual trans or Automatic. Less teeth than what you have now will speed up the speedometer. A present tooth count and a pic of your old one will make it the easiest on either Bill or myself to give you the part number for the gear you need.
Thread Starter
|
Cargo Master
Joined: Mar 2014
Posts: 2,031
Likes: 72
Next time I am in a position to pull the speedometer gear, I will. I am guessing it is pretty simple process on my tranny.
I will try this weekend, unless it is something I can do without lifting the truck (don't have my jacks and jack stands at my house) in my driveway.
Then I might try to get to it earlier - while I am cussing at trying to get some semblance of a functioning fuel gauge.
I will try this weekend, unless it is something I can do without lifting the truck (don't have my jacks and jack stands at my house) in my driveway.
Then I might try to get to it earlier - while I am cussing at trying to get some semblance of a functioning fuel gauge.
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
Next time I am in a position to pull the speedometer gear, I will. I am guessing it is pretty simple process on my tranny.
I will try this weekend, unless it is something I can do without lifting the truck (don't have my jacks and jack stands at my house) in my driveway.
Then I might try to get to it earlier - while I am cussing at trying to get some semblance of a functioning fuel gauge.
I will try this weekend, unless it is something I can do without lifting the truck (don't have my jacks and jack stands at my house) in my driveway.
Then I might try to get to it earlier - while I am cussing at trying to get some semblance of a functioning fuel gauge.
Thread Starter
|
Cargo Master
Joined: Mar 2014
Posts: 2,031
Likes: 72
Trending Topics
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
Yellow gear is 18 tooth manual trans. 18 X .85 = 15.3. Lowest number teeth gear Ford makes (still) is 16. 16 tooth M/T gear is part number CODZ17271A. color coded:wine.
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
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
Ya gotta love it when a plan comes together..........
Thread
Thread Starter
Forum
Replies
Last Post
hest_c
1957 - 1960 F100 & Larger F-Series Trucks
8
Jun 27, 2016 10:43 AM
Erik Jaeke
1973 - 1979 F-100 & Larger F-Series Trucks
10
Oct 1, 2015 04:06 PM
78ford351m
1973 - 1979 F-100 & Larger F-Series Trucks
8
Nov 12, 2008 12:18 AM