RamElectricalRet
Junior Member
'93 D250, 5.2L, auto. trans., with no rust 
.
My speedometer stopped working and it turned out to be the VSS. Bought a replacement from NAPA (Echlin brand). When I first start out driving the speedo reading can be up to 15MPH too low (via using a GPS phone app). After driving for 30-45 minutes the speedo to GPS difference lessens to only 1-2MPH.
The initial start out driving MPH difference is greater as the ambient temperature goes lower, less on a hot summer day.
Do I need to try a different brand VSS - suggestions on brand?
Thoughts?
.My speedometer stopped working and it turned out to be the VSS. Bought a replacement from NAPA (Echlin brand). When I first start out driving the speedo reading can be up to 15MPH too low (via using a GPS phone app). After driving for 30-45 minutes the speedo to GPS difference lessens to only 1-2MPH.
The initial start out driving MPH difference is greater as the ambient temperature goes lower, less on a hot summer day.
Do I need to try a different brand VSS - suggestions on brand?
Thoughts?
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