94 e-150 transmission speedometer
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94 e-150 transmission speedometer
I have a 94 E-150. I noticed a couple of days ago the speedometer jumping around while driving down the road. Very erratic. This morning it started shifting very hard in 1st and 2nd gear and seems like it jumps out of gear sometimes in higher gear. Now the speedometer does not work at all until around 45 miles per hour and jumps around very bad. Any advise would be great.
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Freshman User
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Still looking for advice. i changed the shift module on the side of the tranny about 4 years ago because it was jumping out of gear mainly Over Drive. I am thinking the way it is acting it is electronic although the hard shifting scares me. 
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
The TR sensor on the side of the transmission would have no effect on the speedometer or your 4 wheel ABS system.
Is your ABS lamp on the cluster coming on?
If not you may have a bad PSOM.
If it is then you would want to check the wiring under the van and the plug on top of the rear end. If that is good pull out the VSS sensor on top of the center of the rear end and see if it has metal shavings on it. If so wipe it off and change the oil in the rear end and look for damage inside of it. If it has no metal shavings on it then replace the VSS sensor.
Is your ABS lamp on the cluster coming on?
If not you may have a bad PSOM.
If it is then you would want to check the wiring under the van and the plug on top of the rear end. If that is good pull out the VSS sensor on top of the center of the rear end and see if it has metal shavings on it. If so wipe it off and change the oil in the rear end and look for damage inside of it. If it has no metal shavings on it then replace the VSS sensor.
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
VSS: Vehicle Speed Sensor.
A sensor which provides vehicle speed information.
The VSS is a variable reluctance sensor (VRS) that is used to measure position and speed of moving metal components. This sensor consists of a permanent magnet, a ferromagnetic pole piece, a pickup coil, and a rotating toothed wheel.
VSS:
PSOM: Programmable Speedometer/Odometer Module.
A module that processes vehicle speed information for use in various electronic systems. The PSOM can be programmed to accommodate various tire and axle combinations.
PSOM:
A sensor which provides vehicle speed information.
The VSS is a variable reluctance sensor (VRS) that is used to measure position and speed of moving metal components. This sensor consists of a permanent magnet, a ferromagnetic pole piece, a pickup coil, and a rotating toothed wheel.
VSS:
PSOM: Programmable Speedometer/Odometer Module.
A module that processes vehicle speed information for use in various electronic systems. The PSOM can be programmed to accommodate various tire and axle combinations.
PSOM:
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