RAM 3500 HD Truck 2WD L6-6.7L DSL Turbo VIN A (2007)
Shifter A/T: Description and Operation
48RE Automatic Transmission
Description
DESCRIPTION
The gear shift mechanism provides six shift positions which are:
-
PARK (P)
-
REVERSE (R)
-
NEUTRAL (N)
-
DRIVE (D)
-
Manual SECOND (2)
-
Manual LOW (1)
Operation
OPERATION
Manual LOW (1) range provides first gear only. Overrun braking is also provided in this range. Manual SECOND (2) range provides first and second
gear only.
DRIVE range provides first, second, third, and overdrive fourth gear ranges. The shift into overdrive fourth gear range occurs only after the transmission
has completed the shift into D third gear range. No further movement of the shift mechanism is required to complete the 3-4 shift.
The fourth gear upshift occurs automatically when the overdrive selector switch is in the ON position. No upshift to fourth gear will occur if any of the
following are true:
-
The transmission fluid temperature is below 10° C (50° F) or above 121° C (250° F).
-
The shift to third is not yet complete.
-
Vehicle speed is too low for the 3-4 shift to occur.
-
Battery temperature is below -5° C (23° F).
