I do believe that it tells the transmission how far you have shoved the go pedal down so that it knows when to down shift. but not sure as my cummins was a manual and my previous dodge truck was an 84 with a kick down lever.
The TPS is just as argve said....it does nothing more than tell the computer that the throttle has been pushed a certain distance, then the computer uses that and does a calculation to determine if it is OK to downshift.
It does not, however, have anything to do with cruise operation as that is a standalone subsystem.
Gotcha, does it have anything to do with increasing line pressure? ie... Will it damage my truck pulling my 24' gooseneck with it unhooked? I found the bracket and such in the glovebox so I can hook it back up to prevent damage. Found out he didn't hook it back up because it was getting in his way of messing with the pump.
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