Dodge 2001 Ram 1500 Owner's Manual page 2057

21 - 422 AUTOMATIC TRANSMISSION - 44RE
REAR SERVO (Continued)
Fig. 222 Rear Servo Components
1 - SNAP-RING
2 - PISTON SEAL
3 - PISTON PLUG
4 - SPRING RETAINER
5 - SNAP-RING
6 - PISTON SPRING
7 - CUSHION SPRING
8 - PISTON
CLEANING
Remove and discard the servo piston seal ring (Fig.
223). Then clean the servo components with solvent
and dry with compressed air. Replace either spring if
collapsed, distorted or broken. Replace the plug and
piston if cracked, bent, or worn. Discard the servo
snap-rings and use new ones at assembly.
Fig. 223 Rear Servo Components
1 - SNAP-RING
2 - PISTON SEAL
3 - PISTON PLUG
4 - SPRING RETAINER
5 - SNAP-RING
6 - PISTON SPRING
7 - CUSHION SPRING
8 - PISTON
ASSEMBLY
(1) Lubricate piston and guide seals (Fig. 224)
with petroleum jelly. Lubricate other servo parts with
Mopar ATF +4, type 9602, transmission fluid.
(2) Install new seal ring on servo piston.
(3) Assemble piston, plug, spring and new snap-
ring.
(4) Lubricate piston seal lip with petroleum jelly.
Fig. 224 Rear Servo Components
1 - SNAP-RING
2 - PISTON SEAL
3 - PISTON PLUG
4 - SPRING RETAINER
5 - SNAP-RING
6 - PISTON SPRING
7 - CUSHION SPRING
8 - PISTON
SHIFT MECHANISM
DESCRIPTION
The gear shift mechanism provides six shift posi-
tions which are:
• PARK (P)
• REVERSE (R)
• NEUTRAL (N)
• DRIVE (D)
• Manual SECOND (2)
• Manual LOW (1)
OPERATION
Manual LOW (1) range provides first gear only.
Overrun braking is also provided in this range. Man-
ual SECOND (2) range provides first and second gear
only.
DRIVE range provides first, second third and over-
drive 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 fol-
lowing 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).
BR/BE