Auto transmission Help!
Thread Starter
|
Freshman User
Joined: Sep 2007
Posts: 40
Likes: 0
Auto transmission Help!
My transmission downshifts from 3rd gear to second and then right back to third gear when low acceleration through town. upon heavy acceleration on highway,no downshifting effects..shifts regularly..
Any advice would be very much appreciated.
jon
Any advice would be very much appreciated.
jon
Senior User
Joined: Jul 2007
Posts: 118
Likes: 1
From: Winthrop, Minnesota
Get or borrow or rent a OBD1 code reader and read the diagnostic codes from the transmission control computer. These will tell you the most likely problems you are having. It sounds harder than it actually is. Just follow the test instructions exactly step by step and you will be able to read the codes no problem.
Jim
Jim
Senior User
Joined: Oct 2004
Posts: 114
Likes: 0
From: Fosen, Norway
Trending Topics
Thread Starter
|
Freshman User
Joined: Sep 2007
Posts: 40
Likes: 0
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
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
Elder User
Joined: Aug 2007
Posts: 728
Likes: 0
note , anytime you perform a test on this vehicle with a code reader you must hold the throttle at the wide open setting before initializing the tester or you will recieve a false code for the fipl , (tp) sensor
example , a pass would be 11-10-11 if you do not hold the throttle open you will receive
a 23-10-11 the first number is for a hard fault code the 10 is the seperator code after that any code is a memory code so 23 -10- 43 would be a hard fault fipl seperator and a memory code for the fipl
example , a pass would be 11-10-11 if you do not hold the throttle open you will receive
a 23-10-11 the first number is for a hard fault code the 10 is the seperator code after that any code is a memory code so 23 -10- 43 would be a hard fault fipl seperator and a memory code for the fipl
Senior User
Joined: Mar 2003
Posts: 205
Likes: 5
From: Marion, Kentucky
I had the same problem with both of my trucks with different causes. My 93 shifting issue was a vehicle speed sensor, which is a cheap and easy fix. This problem also periodically causes the speedometer to be unstable. Speed sensor is available at Autozone. My 91 shifting issue was caused by the TPS (sensor which all above have mentioned) on the injection pump needing adjustment.
These are the only two issues externally which will cause the problem you mention.
Andy
These are the only two issues externally which will cause the problem you mention.
Andy
Thread
Thread Starter
Forum
Replies
Last Post
SomeoneTV
1987 - 1996 F150 & Larger F-Series Trucks
9
Sep 16, 2012 10:12 AM
override
1987 - 1996 F150 & Larger F-Series Trucks
9
Dec 19, 2005 09:54 PM
bigdieseldav
1999 - 2003 7.3L Power Stroke Diesel
2
Dec 18, 2003 07:01 AM