Transmission is slipping.
Thread Starter
|
New User
Joined: Jul 2017
Posts: 7
Likes: 0
Transmission is slipping.
Hello guys I'm new on the forum. I was wondering if anyone knows what the problem could be with my transmission slipping? I have a 1995 f150 xlt with a 5.8l efi. I have done many repairs on it but it hasn't solved the problem. Repairs include, rebuilt transmission, a rebuilt EEC, and a new TPS. I've scanned the truck for codes and got a 452 as a continuous code and I think it's something about the vehicle speed sensor but I'm not sure if that would help. Any advice is appreciated.
Thanks
Thanks
Laughing Gas
Joined: Oct 2014
Posts: 1,227
Likes: 4
From: Washington
The transmission shifts based on input the computer receives from the vehicle speed sensor.
Found this thread on another forum:
Code 452 and Tranny issues linked. (along with a small valve issue) - Ford Bronco Forum
A quote from the thread with what may be relevant info:
Found this thread on another forum:
Code 452 and Tranny issues linked. (along with a small valve issue) - Ford Bronco Forum
A quote from the thread with what may be relevant info:
Originally Posted by miesk5
yo Isaac,
This from 1994 PCED OBDI-A Aerostar, E-Series/F-Series Trucks, Bronco
Programmable Speedometer/Odometer Module (PSOM)
btw, Ford often refers to VSS AND as the RABS SENSOR
DS1 DIAGNOSTIC TROUBLE CODES (DTCS) 29 AND 452: CHECK PSOM RESISTANCE
Continuous Memory DTC 29 indicates that during the last 80 warm-up cycles, the PCM detected an error in the PSOM output signal. DTC 452 indicates the PCM detected an error in the PSOM output signal during the last 40 warm-up cycles.
Possible Causes:
Damaged Rear Anti-Lock Brake System (RABS).
Damaged PSOM.
Damaged harness circuits.
Damaged PCM.
Key off.
Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
Install breakout box, leave PCM disconnected.
Measure resistance between Test Pin 3 and Test Pin 6 at the breakout box.
Read more
instead of breakout box, go to the EEC CONNECTOR pin or other instead; for instance - Measure resistance between Test Pin 3 and Test Pin 6; EEC Connector Pin 3 is VSS +
in 6 is VSS -
To help troubleshoot;
EEC IV Connector Pin Diagram
by Fireguy50 (Ryan M) at Wayback Machine
EEC Connector Pin Outs LEGEND, Bronco & Ford Truck & Van: 4.9, 460, 5.0, 5.8; by Ryan M (Fireguy50) at Ford Fuel Injection
This from 1994 PCED OBDI-A Aerostar, E-Series/F-Series Trucks, Bronco
Programmable Speedometer/Odometer Module (PSOM)
btw, Ford often refers to VSS AND as the RABS SENSOR
DS1 DIAGNOSTIC TROUBLE CODES (DTCS) 29 AND 452: CHECK PSOM RESISTANCE
Continuous Memory DTC 29 indicates that during the last 80 warm-up cycles, the PCM detected an error in the PSOM output signal. DTC 452 indicates the PCM detected an error in the PSOM output signal during the last 40 warm-up cycles.
Possible Causes:
Damaged Rear Anti-Lock Brake System (RABS).
Damaged PSOM.
Damaged harness circuits.
Damaged PCM.
Key off.
Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.
Install breakout box, leave PCM disconnected.
Measure resistance between Test Pin 3 and Test Pin 6 at the breakout box.
Read more
instead of breakout box, go to the EEC CONNECTOR pin or other instead; for instance - Measure resistance between Test Pin 3 and Test Pin 6; EEC Connector Pin 3 is VSS +
in 6 is VSS -
To help troubleshoot;
EEC IV Connector Pin Diagram
by Fireguy50 (Ryan M) at Wayback Machine
EEC Connector Pin Outs LEGEND, Bronco & Ford Truck & Van: 4.9, 460, 5.0, 5.8; by Ryan M (Fireguy50) at Ford Fuel Injection
Thread
Thread Starter
Forum
Replies
Last Post
Lerch7.3
1999 - 2003 7.3L Power Stroke Diesel
9
Jun 24, 2015 07:53 AM
