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Hi, I checked the computer codes and these codes appeared
F-150 1993 5.0
(654) transmission selector not in PARK -
transmission
------
(452)vehicle speed sensor (VSS) problem
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(634) Park/Neutral Position (PNP)
or Clutch Pedal Position
(CPP) circuit fault
Electronic shift transmission
- Manual Lever Position
(MLP) sensor out of range
in Park-Transmissions
Does the speed sensor(VSS) have anything to do with the hard shift?
How do I solve code 634
Last edited by khaled Alharbi; Oct 17, 2021 at 11:57 AM.
I have no idea exactly what you're working on, but if it's an electronically controlled transmission (AOD-E/4R70W or E4OD/4R100) the VSS signal is needed by the transmission, as an input, to determine shift points. But those codes are telling you what you need to know.
You've got a VSS issue that needs attention, and the MLPS needs adjustment, if not replacement.
I have no idea exactly what you're working on, but if it's an electronically controlled transmission (AOD-E/4R70W or E4OD/4R100) the VSS signal is needed by the transmission, as an input, to determine shift points. But those codes are telling you what you need to know.
You've got a VSS issue that needs attention, and the MLPS needs adjustment, if not replacement.
Hard shifts are known as limp mode. The computer increases line pressure to make sure shifts happen & things get lubricated. With mine, they came & went for years.
Hard shifts are known as limp mode. The computer increases line pressure to make sure shifts happen & things get lubricated. With mine, they came & went for years.
