Speedometer problems
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Joined: Jun 2021
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From: VA
Speedometer problems
Does anybody know exactly what would cause my speedometer to max out when only going 5 mph or so. Also my odometer stopped working at the same time and says error. I just got my transmission rebuilt and I need to have this fixed due to the trans and the speedometer not working together properly thanks!
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
What is the conversion constant set to?
If it was set at 1.0 that would do it.
If not that you more than likely have a bad PSOM.
Conversion constant set to 1.0:
Attachment 279754
/
If it was set at 1.0 that would do it.
If not that you more than likely have a bad PSOM.
Conversion constant set to 1.0:
Attachment 279754
/
Junior User
Joined: Aug 2010
Posts: 92
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PSOM is most likely dead. I just ordered one for my truck 20 minutes ago from Module Mechanics in Florida. I was having hard shifting issues and ran all of the diagnostics that I could find. Speedo worked perfect but signal wasn't being transmitted to ECU. I'll know in a day or two if that's the issue, I'm reasonably confident that it is.
Freshman User
Joined: Jul 2012
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What is a PSOM? MY 95 SPEEDO IS BOUNCING ALL OVER WHEN ABOVE 70 KMH/45 MPH AND TRANNY BANGING SHIFTS HARD. : REBUILT DIF, NEW V.S.S. (VEHICLE-SPEED-SENSOR). TRanny shop says nothng wrong with transmission, scatching my head, mechanic scratching his head. WTH?
Fleet Owner
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From: Easton,Ks
Fleet Owner
Joined: Aug 2005
Posts: 23,667
Likes: 301
From: Easton,Ks
It is inside the cluster enclosure.
The "SPEEDO" (speedometer head) plugs into the PSOM PC board.
The "SPEEDO" (speedometer head) plugs into the PSOM PC board.
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Hey there SubFord, exactly how did you do this?
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