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SLIPPING OR HARSH 1-2 SHIFT 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 2-4 Servo Assembly (13-28) 4th Servo piston in backward Checks Causes Valve Body Assembly (60) z Mislocated valve body to spacer plate checkball or z 1-2 Shift valve train stuck due to sediment z Gaskets or spacer plate incorrect, mispositioned or damaged z 1-2 Accumulator valve stuck or damaged z Face not flat z 4-3 sequence valve stuck or damaged z #1 or #8 checkball missing or mis-located z 1-2 accumulator valve bushing rotated 180° 2-4 Servo Assembly (13-28) z Apply pin too long or too short z 2nd servo apply piston seal missing, cut or damaged z Restricted or missing oil passages z Servo bore in case damaged 2nd Accumulator (55-57, 104) z Porosity in 1-2 accumulator cover or piston z Piston seal or groove damaged z Nicks or burrs in 1-2 accumulator housing z Missing or restricted oil passage z 1-2 accumulator piston spring not seated z Rough finish in 1-2 accumulator bore in case z A cracked 1-2 accumulator piston - allowing fluid to leak by 2-4 Band (602) Worn or mispositioned Oil Pump Assembly (4) or Case Faces not flat Checks Causes Oil Pump (4) Stator shaft bushings scored or off location Valve Body Assembly (60) z 2-3 Shift valve train stuck z Gaskets or spacer plate incorrect, mispositioned or z 2-3 Accumulator valve stuck
2004 Hummer H2 2004 TRANSMISSION Automatic Transaxle - 4L60-E/4L65-E (Troubleshooting)
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