For 1990-2009 cars

#### Slipping or Rough 1-2 Shift

Checks | Causes
--- | ---
Valve Body Assembly (60) |

• | Mislocated valve body to spacer plate checkball or checkballs.

• | 1-2 Shift valve train stuck due to sediment

• | Gaskets or spacer plate incorrect, mispositioned or damaged

• | 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, 104) |

• | 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 leak by

2-4 Band (602) | Worn or mispositioned
Oil Pump Assembly (4) or Case (103) | Faces not flat