Dodge RAM TRUCK 1500 1995 Service Manual page 1463

21 - 180 42RH TRANSMISSION OVERHAUL
(21) Install front annulus snap ring (Fig. 83). Use
snap ring pliers to avoid distorting ring during in­
stallation. Also be sure ring is fully seated.
Fig. 33 Front Annulus Snap Ring Installation
(22) Install planetary selective snap ring with snap
ring pliers (Fig. 84). Be sure ring is fully seated.
SELECTIVE
Fig. 84 Planetary Selective Snap Ring Installation
(23) Turn planetary geartrain assembly over so
driving shell is facing workbench. Then support
geartrain on wood block positioned under forward
end of intermediate shaft. This is necessary so
geartrain components will move forward for accurate
end play check.
(24) Check planetary geartrain end play with
feeler gauge (Fig. 85). Gauge goes between shoulder
on intermediate shaft and end of rear annulus sup­
port.
(25) Geartrain end play should be 0.12 to 1.22 mm
(0.005 to 0.048 in.). If end play is incorrect, snap ring
(or thrust washers) may have to be replaced. Snap
ring is available in three different thicknesses for ad­
justment purposes.
BR
Fig. 85 Checking Planetary Geartrain End Play
FRONT SERVO AND BAND OVERHAUL
FRONT SERVO DISASSEMBLY (FIG. 86)
(1) Remove small snap ring from servo piston.
(2) Remove piston, rod, springs and guide.
(3) Remove and discard servo piston rings and C D -
ring.
FRONT BAND AND SERVO INSPECTION
Clean the servo components with solvent and dry
them with compressed air.
Inspect the servo components. Replace the springs
if collapsed, distorted or broken. Replace the guide,
rod and piston if cracked, bent, or worn. Discard the
servo snap ring if distorted or warped.
Replace the front band if distorted, the lining is
burned or flaking off, or excessively worn.
Check the servo piston bore for wear. Replace the
piston and rod as an assembly if either part is worn
or damaged.
Replace any servo component if doubt exists about
its condition. Do not reuse suspect parts.
ASSEMBLING FRONT SERVO PISTON
(1) Lubricate seal rings and O-rings with petro­
leum jelly. Lubricate other servo parts with transmis­
sion fluid.
(2) Install new O-ring on servo piston rod.
(3) Install new seal on piston rod guide and install
new seal rings on piston.
(4) Assemble rod, piston, servo springs and snap
ring (Fig. 86).