Speedometer drive gear for E4OD, where is it?
Thread Starter
|
Senior User
Joined: Dec 1999
Posts: 115
Likes: 0
Speedometer drive gear for E4OD, where is it?
I recently did a gear swap on my '92 Flareside 4x4 351 E4OD. I went from 3.08 to 4.56. I want to correct the speedometer. I'm running 33" tires, so I figured a gear from a truck with 4.10's and stock tires should get it close. When I went to Ford they said they had nothing for a 4.10 or 3.73 for the E4OD trans. So I went home and crawled under the truck. I couldn't find a speedometer cable, so I figure it's electronic, but I couldn't find a pulse generator either. I didn't see anything that looked like it housed a changable gear like the older ones. Is there any way to correct the speedometer/odometer on my truck? HELP!
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
Speedometer drive gear for E4OD, where is it?
Rockcrawl,
From what I gathered from earlier posts , the speedo signal is sent from a toothed gear , next to the ring . Best I recall , it not only runs the anti lock brake functions , but also the speedometer .
Paul
From what I gathered from earlier posts , the speedo signal is sent from a toothed gear , next to the ring . Best I recall , it not only runs the anti lock brake functions , but also the speedometer .
Paul
Thread Starter
|
Senior User
Joined: Dec 1999
Posts: 115
Likes: 0
Speedometer drive gear for E4OD, where is it?
Paul,
Thanks! I had thought of that while looking around under the truck, but I had never heard of anything like it, so I dismissed the thought. That must be it.
That means the axle gear change would not affect the speedometer reading, but the larger tire size would. I wonder if there are different gears available to compensate for the tire change. I didn't see the sensor when the gears were changed, but I had assumed it was not meshed gears, but a toothed ring and a hall-effect sensor that doesen't actually make contact. I'll investigate tommorow!
Thanks again.
Jon
Thanks! I had thought of that while looking around under the truck, but I had never heard of anything like it, so I dismissed the thought. That must be it.
That means the axle gear change would not affect the speedometer reading, but the larger tire size would. I wonder if there are different gears available to compensate for the tire change. I didn't see the sensor when the gears were changed, but I had assumed it was not meshed gears, but a toothed ring and a hall-effect sensor that doesen't actually make contact. I'll investigate tommorow!
Thanks again.
Jon
Senior User
Joined: Jan 2000
Posts: 289
Likes: 0
From: NJ
Speedometer drive gear for E4OD, where is it?
A gear change does not affect your speedometer but you tires will. I got some good info from this list to recalibrate my speedo back in Dec. it is very easy to do. It will probably take you about 5 Minutes to do. Just remember that your speedometer module can only be reprogrammed 6 times. Good Luck
New User
Joined: Jan 2000
Posts: 6
Likes: 0
Speedometer drive gear for E4OD, where is it?
Did you try the xfer case? Thats where it is. I would think it would be near the speedo cable...
Trending Topics
Postmaster
Joined: Jul 1999
Posts: 3,172
Likes: 4
Speedometer drive gear for E4OD, where is it?
Rockcrawl,
The best I recall , its was either 92 or 94 that Ford went to usung the electronic speedos . When I first read your post , I thought I read 94 instead of 92 . Like the previous post mentioned , In 4wd , the speedo gear is in the rear of the transfer case .
Paul
The best I recall , its was either 92 or 94 that Ford went to usung the electronic speedos . When I first read your post , I thought I read 94 instead of 92 . Like the previous post mentioned , In 4wd , the speedo gear is in the rear of the transfer case .
Paul
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Thread Starter
|
Senior User
Joined: Dec 1999
Posts: 115
Likes: 0
Speedometer drive gear for E4OD, where is it?
Thanks everyone for the info. Mine is electronic and it gets it's signal from the ABS sensor on the rear axle. Thanks JoeB for the email explaining how to calibrate it. This is great, if I go to bigger tires later, all I have to do is recalibrate it again. No gear to buy! I love my truck!
Thread
Thread Starter
Forum
Replies
Last Post
wahlturfcare
1987 - 1996 F150 & Larger F-Series Trucks
20
Sep 16, 2016 08:43 PM
Rentaro
1987 - 1996 F150 & Larger F-Series Trucks
9
Feb 18, 2016 03:15 AM
