Speed Sensor
#1
#3
You do not have the part in the photo on a 1994 F150.
As StrangeRanger said the rear end sensor is your speed sensor (VSS/ABS).
The one on the transmission is the Output shaft speed sensor (OSS) and is not used for speed of the truck and only goes to the PCM for shift scheduling.
As StrangeRanger said the rear end sensor is your speed sensor (VSS/ABS).
The one on the transmission is the Output shaft speed sensor (OSS) and is not used for speed of the truck and only goes to the PCM for shift scheduling.
Last edited by subford; 06-06-2009 at 08:46 AM.
#7
I know this is a really late reply to the situation, but after years of playing with the same problem posted above and my speedometer still reading, I found that the problem was not the VSS sending unit or the line, but instead it was the PSOM (promable speed/Odometer Module) in the back of the cluster that attatches to the speedometer. It causes bad shifts and reed codes that say bad VSS despite still have a good speed read. The reason is that the PSOM throws bad information to the PCM (Powertrain Control Module) saying that the VSS isn't sending. This will cause the PCM to send bad information to the transmission. Good Luck to any who have this problem as a replacement cluster is Over $300 at the dealer or $ 35 and up on e-bay, or around $150 at DNA Speedometers Inc. I am sending mine in, as the 1994 Lightning replacement I found isn't working out, though it did solve my shifting and code problems.