B&M 70226 TRANSKIT FOR GM 4L80E TRANSMISSION User Manual
Page 9
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9
ERROR CONDITION WHERE TO LOOK
FOR CAUSE
High or Low Oil Pressure
Oil Pump
- Pressure Regulator Valve Stuck.
- P/R Retainnig Ring not fully seated in groove.
Oil Filter
- Cracks in Filter Pickup Tube.
- Pickup Tube Seal Damaged.
- Wrong grease used on reassembly (clogged solenoid
filter).
Wire loom
- Electrical connectors not fully engaged.
Valve Body Assembly
- Spacer Plate or Gaskets misassembled or damaged.
- Check Balls omitted or misassembled.
- Valve Body or Accumulator Housing bolts loose.
Pressure Control Solenoid
- Stuck “ON”
Harsh/Soft Shifts
Valve Body Assembly
- Wrong holes drilled is Spacer Plate.
- Spacer Plate or gaskets misassembled or damaged.
- Check Balls omitted or misassembled.
Oil Pump
- Pressure Regulator Valve Stuck.
Accumulator Assembly
- Wrong Spring or Spacer installed.
- Damaged or missing Accumulator Housing gasket.
- Accumulator Housing bolts loose.
Inconsistent or No Shifts
Valve Body Assembly
- Spacer Plate or gaskets misassembled or damaged.
- Pressure Switch Assembly connector not fully engaged.
- Pressure Swith Assembly/Valve Body bolts loose.
External Linkage
- Manual Shift Lever Linkage misadjusted.
Wire loom
- Electrical connectors not fully engaged.
No or Slips in 1st Gear
Low Oil Pressure
- (See above)
Valve Body Assembly
- Spacer Plate or gaskets misassembled or damaged.
- Solenoid disconnected or damaged.
No or Slipping 2-3 Shift
Valve Body Assembly
- Spacer Plate or gaskets misassembled or damaged.
No or Slipping 3-4 Shift
Valve Body Assembly
- Spacer Plate or gaskets misassembled or damaged.
- Solenoid disconnected or damaged.
No or Slipping Reverse
Valve Body Assembly
- Spacer Plate or gaskets misassembled or damaged.
Oil Pump
- P/R Retaining Ring not fully seated in groove.
External Linkage
- Manual Shift Lever Linkage Misadjusted.
No TCC Apply
TCC Solenoid
- Solenoid disconnected or wiring damaged.