Dodge RAM 1500 1998 Owner's Manual page 1860

DR
AUTOMATIC TRANSMISSION - 48RE (Continued)
CONDITION
OIL LEAKS.
NOISY OPERATION IN
FOURTH GEAR ONLY
POSSIBLE CAUSES
1. Fluid Lines and Fittings Loose/
Leaks/Damaged.
2. Fill Tube (where tube enters case)
Leaks/Damaged.
3. Pressure Port Plug Loose
Loose/Damaged.
4. Pan Gasket Leaks.
5. Valve Body Manual Lever Shaft
Seal Leaks/Worn.
6. Rear Bearing Access Plate Leaks.
7. Gasket Damaged or Bolts are
Loose.
8. Adapter/Extension Gasket
Damaged Leaks/Damaged.
9. Park/Neutral Switch, or
Transmission Range Sensor
Leaks/Damaged.
10. Converter Housing Area Leaks.
11. Pump Seal Leaks/Worn/
Damaged.
12. Torque Converter Weld
Leak/Cracked Hub.
13. Case Porosity Leaks.
1. Overdrive Clutch Discs, Plates or
Snap Rings Damaged.
2. Overdrive Piston or Planetary
Thrust Bearing Damaged.
3. Output Shaft Bearings Scored/
Damaged.
4. Planetary Gears Worn/Chipped.
5. Overdrive Unit Overrunning Clutch
Rollers Worn/Scored.
AUTOMATIC TRANSMISSION - 48RE
1. Tighten fittings. If leaks persist, replace
fittings and lines if necessary.
2. Replace tube seal. Inspect tube for
cracks in fill tube.
3. Tighten to correct torque. Replace plug
or reseal if leak persists.
4. Tighten pan screws (150 in. lbs.). If leaks
persist, replace gasket.
5. Replace shaft seal.
6. Replace gasket. Tighten screws.
7. Replace bolts or gasket or tighten both.
8. Replace gasket.
9. Replace switch and gasket.
10. Check for leaks at seal caused by worn
seal or burr on converter hub (cutting seal),
worn bushing, missing oil return, oil in front
pump housing or hole plugged. Check for
leaks past O-ring seal on pump or past
pump-to-case bolts; pump housing porous,
oil coming out vent due to overfill or leak
past front band shaft access plug.
11. Replace seal.
12. Replace converter.
13. Replace case.
1. Remove unit and rebuild clutch pack.
2. Remove and disassemble unit. Replace
either thrust bearing if damaged.
3. Remove and disassemble unit. Replace
either bearing if damaged.
4. Remove and overhaul overdrive unit.
5. Remove and overhaul overdrive unit.
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CORRECTION