E4OD won’t hold gear
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1st Gear
Joined: Nov 2025
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E4OD won’t hold gear
Hey guys. I have a 91 f250 xlt lariat standard cab long bed 2wd E4OD geared 4.11. The truck has 94,000 original miles on it and I had the transmission rebuilt at 91,000. The transmission won’t hold gear at first. It shifts up down up down up down up down and then finally catches and holds that gear. Next shift is the same thing up down up down up down up down. And it’s not a slow laggy shift it’s almost instant like it’s not fully shifting. Any advice or ideas??
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,712
Likes: 2,638
From: SE Florida
Hotshot
Joined: Jul 2020
Posts: 10,377
Likes: 2,600
From: Near Salt Lake City
You won't see a pro use that method
You will see them using one of these for a 1991
[img alt="This is the dealership scan tool for your 1991
It's also the ONLY way to initiate the self tests on a Lincoln air ride system"]https://cimg0.ibsrv.net/gimg/www.ford-trucks.com-vbulletin/2000x2000/super_star_ii_27b014b7be8b990cb9bd74dff519c5a70f01 9030.jpg[/img]
This is the dealership scan tool for your 1991 It's also the ONLY way to initiate the self tests on a Lincoln air ride system
You will see them using one of these for a 1991
[img alt="This is the dealership scan tool for your 1991
It's also the ONLY way to initiate the self tests on a Lincoln air ride system"]https://cimg0.ibsrv.net/gimg/www.ford-trucks.com-vbulletin/2000x2000/super_star_ii_27b014b7be8b990cb9bd74dff519c5a70f01 9030.jpg[/img]
This is the dealership scan tool for your 1991 It's also the ONLY way to initiate the self tests on a Lincoln air ride system
Hotshot
Joined: Jul 2020
Posts: 10,377
Likes: 2,600
From: Near Salt Lake City
You probably have a shorted or oil contaminated E4OD harness
Means a scan tool and 50 cents will buy a cup of coffee
You need a service manual and to do a few pinpoint tests after retrieving a code
That is "if" there is a code you can scan and retrieve
The book is your friend
Means a scan tool and 50 cents will buy a cup of coffee
You need a service manual and to do a few pinpoint tests after retrieving a code
That is "if" there is a code you can scan and retrieve
The book is your friend
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,712
Likes: 2,638
From: SE Florida
That's true, but he doesn't seem to be a pro. And not everyone needs to spend the money on a scan tool just to read codes.
Logistics Pro
Joined: Aug 2014
Posts: 3,556
Likes: 851
A paper works just fine, if you know how to use it.
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