Transmission problems with no speedometer or odometer - F150online Forums

Log In 


Pre-1997 Models

Transmission problems with no speedometer or odometer

Reply
 
 
 
Thread Tools Search this Thread
  #1  
Old 10-10-2011, 01:51 PM
Junior Member
Thread Starter
 
Join Date: Oct 2011
Location: az
Vehicle: 1994 ford f350
Posts: 4
Transmission problems with no speedometer or odometer

I have a 1994 F350, 7.3 Diesel with E40D. I had the transmission overhauled about 30K miles ago. Now the transmission shifts roughly, jerks as you accelerate and sometimes when you de-cel. Drives normally at a higher speed. I also do not have speedometer and odometer not working. I checked the fuse at the fuse box, fuse is not broken. I talked to a mechanic who told me it could be a speed sensor, located on the rear axle housing. Is there a way to check the sensor without purchasing one and finding out that is not the problem. What else could be the problem? Any help is appreciated.
Reply With Quote
  #2  
Old 10-10-2011, 04:39 PM
Senior Member
 
Join Date: May 1999
Location: Copley, Ohio
Vehicle: 1996 Ford F150
Posts: 2,477
It could be the sensor, the wiring or the exciter ring on the diff carrier. Pull the sensor, clean it, check the wiring harness and connector for problems. If you can shine a flashlight into the sensor hole look in, turn the driveshaft and see if there are any bent or missing teeth on the exciter. If everything appears to be good re-install the sensor and see if it works. If it doesn't, you may want to pull the diff cover to inspect the exciter ring but that is not likely to be the issue.
Reply With Quote
  #3  
Old 10-11-2011, 12:44 PM
Junior Member
Thread Starter
 
Join Date: Oct 2011
Location: az
Vehicle: 1994 ford f350
Posts: 4
I clean the sensor and checked the harness. Earlier checked the fuse under the panel in the cab. Nothing is working, but I have not shine a flashlight to check the "exciter ring". Question, Will the sensor cause the speedometer not to work and the odometer not to luminate?
Reply With Quote
  #4  
Old 10-11-2011, 05:38 PM
Senior Member
 
Join Date: May 1999
Location: Copley, Ohio
Vehicle: 1996 Ford F150
Posts: 2,477
Quote:
Originally Posted by cekerley View Post
...Question, Will the sensor cause the speedometer not to work and the odometer not to luminate?
THAT is a different symptom. Do you mean that the instrument lighting does not work or do you mean that the LCD odometer display is blank? If the odo were simply not getting a speed signal it would display an error code. If it is not displaying anything, most likely it is either burned out or not getting power. Since you've checked the fuses (there are 2), you need to check for power at the PSOM connector. The light green/yellow wire (#54) should be hot at all times, the white/pink wire (#296) should be hot in run
Reply With Quote
  #5  
Old 10-12-2011, 07:45 PM
Junior Member
Thread Starter
 
Join Date: Oct 2011
Location: az
Vehicle: 1994 ford f350
Posts: 4
Sorry, I should have been more clear, the instrument panel does light, but the LCD odometer is blank. I will go and check the two wires you pointed out to see if they are hot. Thanks a lot.
Reply With Quote
  #6  
Old 10-12-2011, 08:15 PM
Steve83's Avatar
Senior Member
 
Join Date: Nov 2006
Location: Memphis, TN 38135, USA, Earth
Vehicle: 1983 Ford Bronco
Posts: 5,492
Sounds like the PSOM is dead. Read this caption & follow the links in it:

Reply With Quote
  #7  
Old 10-19-2011, 12:53 PM
adrianspeeder's Avatar
Senior Member
 
Join Date: Dec 2004
Location: Dover AFB DE / Harrisburg PA
Vehicle: 10 FULLsize ole' Ford rigs
Posts: 4,941
Sorry I missed this thread, after you check out Steve's collection of info, here are some more pictures I took when I swapped in a junkyard PSOM to my '95.

https://www.supermotors.net/registry/22140/75545

Adrianspeeder
Reply With Quote
  #8  
Old 10-21-2011, 05:11 PM
Steve83's Avatar
Senior Member
 
Join Date: Nov 2006
Location: Memphis, TN 38135, USA, Earth
Vehicle: 1983 Ford Bronco
Posts: 5,492
Yo, Adrian! Why didn't you do the low fuel light mod, or the oil pressure mod?

Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
2015 F150 Problems Vanwilder01 2015 - 2016 F-150 31 08-04-2016 03:07 PM
Having 2 problems...Thump and Vibration/Shutter fdegree 2009 - 2014 F-150 14 03-02-2016 09:56 PM
another manual shift 4x4 problem cschmelzer 1997 - 2003 F-150 14 07-28-2015 09:12 PM
Is my truck losing power, transmission going, or am I going crazy? clintonvillian 2004 - 2008 F-150 4 07-25-2015 09:59 PM
Lariat to FX4 Speedometer cluster Swap transam396 2004 - 2008 F-150 4 07-16-2015 05:12 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off



All times are GMT -4. The time now is 07:51 PM.


This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Fordé is a registered trademark of the Ford Motor Company