Transmission slipping
Thread Starter
|
New User
Joined: Apr 2021
Posts: 6
Likes: 0
Transmission slipping
I apologize if I missed this topic in the search but couldn't find what I was looking for.
I've got a 92 F350 4x4 Crewcab that the transmission randomly slips out of gear after using the brakes. This only happens at slow speeds, the brake lights work it doesn't have a 3rd brake light it has the white light.
I've got a 92 F350 4x4 Crewcab that the transmission randomly slips out of gear after using the brakes. This only happens at slow speeds, the brake lights work it doesn't have a 3rd brake light it has the white light.
Thread Starter
|
New User
Joined: Apr 2021
Posts: 6
Likes: 0
After researching the MLPS circuit the symptoms match up. It's definitely where I'm gonna start at. I knew the brake lights could cause issues but I've never heard of the MLPS circuit. First Ford I've owned.... Thanks for the help. I'll update once I change it out.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,712
Likes: 2,631
From: SE Florida
99% of the time I would strongly agree with you. But this time I don't. As the MLPS wears it starts to act up and cause the problem that he is describing. The problem is that it is almost impossible to diagnose. He just needs to replace the MLPS.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,712
Likes: 2,631
From: SE Florida
The PCM can find a wiring problem and set a code. It can't find the bad MLPS, because to the PCM it looks like the driver moved the shift handle to N. It doesn't make sense to set a code when the driver shifts to N.
Mark
Mark
FTE Leadership Emeritus
Joined: Aug 2006
Posts: 47,280
Likes: 172
From: DELAWARE, The First State
Trending Topics
Logistics Pro
Joined: Nov 2013
Posts: 3,926
Likes: 1,194
From: Mojave, Ca
I apologize if I missed this topic in the search but couldn't find what I was looking for.
I've got a 92 F350 4x4 Crewcab that the transmission randomly slips out of gear after using the brakes. This only happens at slow speeds, the brake lights work it doesn't have a 3rd brake light it has the white light.
I've got a 92 F350 4x4 Crewcab that the transmission randomly slips out of gear after using the brakes. This only happens at slow speeds, the brake lights work it doesn't have a 3rd brake light it has the white light.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
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
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Scope Wizard
Joined: May 2019
Posts: 6,530
Likes: 25
Actually my script Ran a bit longer than I thought it would.... it was unintentional to remove these posts........... but it is what it is.....
The intent was to only Delete Copyrighted material that Violates your TOS had I allowed the script to continue it would have Removed ALL my posts.
Hopefully all Copyrighted material has been deleted......
Last edited by lonewolf_; Apr 16, 2021 at 12:02 AM.
Mountain Pass
Joined: Apr 2021
Posts: 144
Likes: 16
From: Fratt, TX
Quote:
Originally Posted by Josh Coleman View Post
I apologize if I missed this topic in the search but couldn't find what I was looking for.
I've got a 92 F350 4x4 Crewcab that the transmission randomly slips out of gear after using the brakes. This only happens at slow speeds, the brake lights work it doesn't have a 3rd brake light it has the white light.
How hard do you need to press the pedal to get it to pop out of gear? What percentage of the time does braking cause it to pop out of gear? Do you need to move the shifter to get it to go back into gear?
when you say it pops out of gear does it go into say 3rd from OD or?? when my AOD was slipping in and out of OD through FTE i learned that brake light wiring does effect it as when the light comes on the TC disenages (iirc). so way back then i checked my wiring and cleaned it up a little and the problem went away....
Originally Posted by Josh Coleman View Post
I apologize if I missed this topic in the search but couldn't find what I was looking for.
I've got a 92 F350 4x4 Crewcab that the transmission randomly slips out of gear after using the brakes. This only happens at slow speeds, the brake lights work it doesn't have a 3rd brake light it has the white light.
How hard do you need to press the pedal to get it to pop out of gear? What percentage of the time does braking cause it to pop out of gear? Do you need to move the shifter to get it to go back into gear?
when you say it pops out of gear does it go into say 3rd from OD or?? when my AOD was slipping in and out of OD through FTE i learned that brake light wiring does effect it as when the light comes on the TC disenages (iirc). so way back then i checked my wiring and cleaned it up a little and the problem went away....
Last edited by Nathan Fuentes; Apr 17, 2021 at 12:10 AM. Reason: wanted to add quoted material
Thread
Thread Starter
Forum
Replies
Last Post
breathinhappily
1973 - 1979 F-100 & Larger F-Series Trucks
2
Jun 13, 2002 03:26 PM