I HAVE A 1998 RAM 1500 5.9 L WITH A PO740 CODE AND IT SHIFTS FINE WHEN COLD BUT NOT AFTER IT WARMS UP COULD THE TCC SOLENOID CAUSE IT NOT TO SHIFT OUT OF 2ND GEAR UNLESS I MAKE IT????

Asked by Feb 03, 2014 at 10:54 AM about the 1998 Dodge Ram 1500 2 Dr ST 4WD Extended Cab LB

Question type: Maintenance & Repair

THE TRUCK DOES FINE WHEN ITS COLD BUT ONCE IT WARMS UP THE O/D LIGHT COMES ON AND IT WONT SHIFT OUTTA 2ND GEAR UNLESS I GAS ON IT AND LET OFF . IT HAS A PO740 CODE FOR THE TCC SOLENOID . CAN IT KEEP IT FROM SHIFTING OUT OF 2ND????

2 Answers

...I'm going to suggest that your system ground is corroded....to the point where the sensors aren't finding proper ground...undo the bolt that holds the main black 1/0 cable to the chassis ground...wirebrush that lug free of corrosion 'till shiny...then the chassis too....so a steady 300 or more cold cranking amps can get thru there~ You just need good ground connections to the frame and dashboard components, fuel pump, ignition system and the headlights and dash components~....when in doubt TEST for 12.5 or so volts....the GROUND has to be there or the sensors will not be reading correctly~

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sounds like a trans issue... not sure if the TCC Silenoid is internal but im sure it is also check the fluid while it was hot and running make sure it is full. I would have it check out soon.. as the longer you wait for work on a trans the more damage it will cause and that = more $... hope this helps

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