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Dodge Ram Truck 1500-2500-3500. Manual - part 1812
4. Remove timing valve cover.
5. Remove 3-4 timing valve and spring.
6. Remove 3-4 quick fill valve, spring and plug.
7. Remove 3-4 shift valve and spring.
8. Remove converter clutch valve, spring and plug.
9. Remove converter clutch timing valve, retainer and
valve spring.
CLEANING
Clean the valve housings, valves, plugs, springs, and separator plates with a standard parts cleaning solution only.
Do not use gasoline, kerosene, or any type of caustic solution.
Do not immerse any of the electrical components in cleaning solution. Clean the governor solenoid and sensor and
the dual solenoid and harness assembly by wiping them off with dry shop towels only.
Dry all except the electrical parts with compressed air. Make sure all passages are clean and free from obstructions.
Do not use rags or shop towels to dry or wipe off valve body components. Lint from these materials can
stick to valve body parts, interfere with valve operation, and clog filters and fluid passages.
Wipe the governor pressure sensor and solenoid valve with dry, lint free shop towels only. The O-rings on the sen-
sor and solenoid valve are the only serviceable components. Be sure the vent ports in the solenoid valve are open
and not blocked by dirt or debris. Replace the valve and/or sensor only when DRB scan tool diagnosis indicates this
is necessary. Or, if either part has sustained physical damage (dented, deformed, broken, etc.).
CAUTION: Do not turn the small screw at the end of the solenoid valve for any reason. Turning the screw
in either direction will ruin solenoid calibration and result in solenoid failure. In addition, the filter on the
solenoid valve is NOT serviceable. Do not try to remove the filter as this will damage the valve housing.
INSPECTION
Inspect the throttle and manual valve levers and shafts. Do not attempt to straighten a bent shaft or correct a loose
lever. Replace these components if worn, bent, loose or damaged in any way.
Inspect all of the valve body mating surfaces for scratches, nicks, burrs, or distortion. Use a straightedge to check
surface flatness. Minor scratches may be removed with crocus cloth using only very light pressure.
Minor distortion of a valve body mating surface may be corrected by smoothing the surface with a sheet of crocus
cloth. Position the crocus cloth on a surface plate, sheet of plate glass or equally flat surface. If distortion is severe
or any surfaces are heavily scored, the valve body will have to be replaced.
CAUTION: Many of the valves and plugs, such as the throttle valve, shuttle valve plug, 1-2 shift valve and
1-2 governor plug, are made of coated aluminum. Aluminum components are identified by the dark color of
the special coating applied to the surface (or by testing with a magnet). Do not sand aluminum valves or
plugs under any circumstances. This practice could damage the special coating causing the valves/plugs to
stick and bind.
Inspect the valves and plugs for scratches, burrs, nicks, or scores. Minor surface scratches on steel valves and
plugs can be removed with crocus cloth but do not round off the edges of the valve or plug lands.Maintaining
sharpness of these edges is vitally important. The edges prevent foreign matter from lodging between the valves
and plugs and the bore.
21 - 1180
AUTOMATIC TRANSMISSION - 48RE - SERVICE INFORMATION
DR/DH