E40D shifting issues
Thread Starter
|
5th Wheeling
Joined: Jul 2021
Posts: 26
Likes: 1
E40D shifting issues
Hi y’all, I’ve got a 1993 f250 with the 7.3 idi diesel and an E40D trans. The trans has really been the Achilles heel of the truck ever since we bought it. The truck came with a bad front seal so we replaced that, the new seal failed before we even got home. So a new front seal went in to fix that.
then it would shift into drive but no movement so we had it towed and a full rebuild to get her goin again. We also replaced the tranny control module. Then not 2 days later did we have more shifting issues. Truck went back and the new trans was toast after less than 500 miles. So another rebuild under warranty brings us to now. Today I’ve had the truck back for 6 days and it flashed the OD light at me and shifted hard once. What could be causing these issues? I’m scared of burning up another trans Sorry for the long winded response but this is beyond frustrating. Thanks
then it would shift into drive but no movement so we had it towed and a full rebuild to get her goin again. We also replaced the tranny control module. Then not 2 days later did we have more shifting issues. Truck went back and the new trans was toast after less than 500 miles. So another rebuild under warranty brings us to now. Today I’ve had the truck back for 6 days and it flashed the OD light at me and shifted hard once. What could be causing these issues? I’m scared of burning up another trans Sorry for the long winded response but this is beyond frustrating. Thanks
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,661
From: SE Florida
What's causing those issues? Something that isn't right is causing them. If you need something more specific than that, read the codes. When the OD light flashed it was telling you that codes have been stored in the computer's memory. You need those codes to figure this out.
Here is how to read them: www.troublecodes.net/ford
Here is how to read them: www.troublecodes.net/ford
Thread Starter
|
5th Wheeling
Joined: Jul 2021
Posts: 26
Likes: 1
How do I check for a plug? The truck shifted very chaotic today, jumping gears choosing to high a gear and then almost stalling. Flashing the OD light at times. Could this be the trans computer telling it wrong? These issues only seem to happen once the trans is warm
Thread Starter
|
5th Wheeling
Joined: Jul 2021
Posts: 26
Likes: 1
Trending Topics
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,661
From: SE Florida
That means there are codes stored. You MUST read the codes to fix this.
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
Thread Starter
|
5th Wheeling
Joined: Jul 2021
Posts: 26
Likes: 1
Alright I got back 3, keep in mind that I could have performed this incorrectly. An 11 which it says means the system is ok, a 10 as a separation code, and a 23 which is either throttle position sensor signal out of range or a fuel injector pump level sensor input is outbid self test range. Neither of these seem to be correlated with my trans issue but if y’all know then please tell. Thanks
Mountain Pass
Joined: Dec 2018
Posts: 247
Likes: 29
I'd get it fixed regardless. The speed sensor is an input for the transmission to know when to shift.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
Likes: 2,661
From: SE Florida
Did you also run the key on engine on (KOEO) test?
Thread Starter
|
5th Wheeling
Joined: Jul 2021
Posts: 26
Likes: 1
Ok, so I replaced the throttle position sensor and that code has disappeared, now I have a code 29 which is insufficient input from vehicle speed sensor, or insufficient input from programmable speedometer odometer module. I can replace the speed sensor in the rear diff but how do I address the other module if that’s what’s broken? Thanks
Thread
Thread Starter
Forum
Replies
Last Post
Slash19
1999 - 2003 7.3L Power Stroke Diesel
11
May 11, 2024 09:06 PM
coreyw2
1994.5 - 1997 7.3L Power Stroke Diesel
2
Dec 5, 2015 04:52 AM