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SLIPPING OR HARSH 1-2 SHIFT Forward clutch piston inner and outer seals missing, cut Damaged forward clutch housing Forward clutch housing retainer and ball assembly not Forward Clutch Piston seal missing, cut or damaged Piston out of its bore Porosity in the piston or valve body Stuck abuse valve Input Housing and Shaft Turbine shaft seals missing, cut or damaged Valve Body (60) 1-2 Accumulator valve stuck Face not flat, damaged lands or interconnected passages Spacer plate or gaskets incorrect, mispositioned or Low Roller Clutch (678) Damage to lugs to inner ramps Rollers not free moving Inadequate spring tension Damage to inner splines Lube passage plugged Torque Converter (1) Stator roller clutch not holding 1-2 Accumulator Assembly Porosity in piston or 1-2 Accumulator cover and pin Damaged ring grooves on piston Piston seal missing, cut or damaged Valve body to spacer plate gasket at 1-2 Accumulator Leak between piston and pin Broken 1-2 Accumulator spring Line Pressure Refer to Oil Pressure High or Low. 2-4 Servo Assembly (13-28) 4th Servo piston in backward
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
Slipping or Rough 1-2 Shift NO 2-3 SHIFT OR 2-3 SHIFT SLIPS, ROUGH OR HUNTING No 2-3 Shift or 2-3 Shift slipping, Rough or Hunting Checks Causes Valve Body Assembly (60) Mislocated valve body to spacer plate checkball or 1-2 Shift valve train stuck due to sediment Gaskets or spacer plate incorrect, mispositioned or 1-2 Accumulator valve stuck or damaged Face not flat 4-3 sequence valve stuck or damaged #1 or #8 checkball missing or mis-located 1-2 accumulator valve bushing rotated 180° 2-4 Servo Assembly (13-28) Apply pin too long or too short 2nd servo apply piston seal missing, cut or damaged Restricted or missing oil passages Servo bore in case damaged 2nd Accumulator (55-57, Porosity in 1-2 accumulator cover or piston Piston seal or groove damaged Nicks or burrs in 1-2 accumulator housing Missing or restricted oil passage 1-2 accumulator piston spring not seated Rough finish in 1-2 accumulator bore in case A cracked 1-2 accumulator piston - allowing fluid to 2-4 Band (602) Worn or mispositioned Oil Pump Assembly (4) or Faces not flat Checks Causes Oil Pump (4) Stator shaft bushings scored or off location Valve Body Assembly (60) 2-3 Shift valve train stuck
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
SECOND/THIRD GEAR ONLY OR FIRST/FOURTH GEARS ONLY Second/Third Gears Only or First/Fourth Gears Only NO FIRST OR SECOND GEAR/NO THIRD OR FOURTH GEAR No 1st or 2nd/No 3rd or 4th Gaskets or spacer plate incorrect, mispositioned or 2-3 Accumulator valve stuck Face not flat Chips in servo feed oil, orifice #7 in spacer plate Mislocated valve body to spacer plate checkball or Input Housing Assembly 3-4 clutch or forward clutch plates worn Excessive clutch plate travel Cut or damaged 3-4 clutch or forward clutch piston seals Porosity in input clutch housing or piston 3-4 clutch piston checkball stuck, damaged or not sealing Restricted apply passages Forward clutch piston retainer and ball assembly not Sealing balls loose or missing Input housing (621) cracked or broken Case (103) 3rd accumulator retainer and ball assembly not seating 2-4 Servo Assembly (13-28) 2nd apply piston seals missing, cut or damaged Checks Causes 1-2 Shift Solenoid Valve Sediment is in the valves The electrical connection is faulty Damaged seal Checks Causes 2-3 Shift Solenoid Valve Sediment is in the valves The electrical connection is faulty
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
NO SECOND GEAR, NO FOURTH GEAR, AND NO REVERSE GEAR No Second Gear, No Fourth Gear and No Reverse Gear THIRD GEAR ONLY Third Gear Only 3-2 FLARE OR TIE-UP 3-2 Flare or Tie-Up NO 3-4 SHIFT, SLIPS OR ROUGH 3-4 SHIFT No 3-4 Shift/Slipping or Rough 3-4 Shift Damaged seal Checks Causes Reaction Sun Shell (670) Broken spline on reaction sun shell/replace shell. Checks Causes System Voltage 12 volts not supplied to transmission Electrical short (pinched solenoid wire) Solenoid not grounded Checks Causes 3-2 Shift Solenoid Valve Shorted or damaged Contamination Damaged Seal Check ball not seating Checks Causes Oil Pump Assembly (4) Pump cover retainer and ball assembly omitted or Faces not flat Valve Body Assembly (60) Valves stuck 2-3 Shift valve train Accumulator valve
2008 Chevrolet Silverado 1500 2008 TRANSMISSION Automatic Transmission - 4L60-E/4L65-E/4L70-E - Cab & Chassis Sierra, Cab & Chassis Silverado, Sierra & Silverado
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