Harsh or Soft 3-4/4-3 Shift Feel
Checks
| Cause
|
DEFINITION: One of the two following conditions occurs during a third to fourth gear steady throttle upshift, or a fourth to third gear coast, or a light to moderate throttle detent downshift:
| • | Harsh shift feel -- an unacceptable quick gear change occurs. |
| • | Soft shift feel -- an unacceptable long gear change occurs. |
|
Automatic Transmission Fluid Level, soft shift only
| Low fluid level
|
Transmission Main Line Pressure
| Low or high transmission main line pressure
|
Oil Filter Assembly, soft shift only
|
| • | The oil filter assembly (100) is missing, plugged, or damaged. |
| • | The oil filter seal assembly (101) is missing or damaged. |
|
3-4 Accumulator Assembly
|
| • | Misassembled upside down 3-4 accumulator assembly |
| • | Damaged or missing 3-4 accumulator piston oil seal ring (427) |
| • | A damaged or missing 3-4 accumulator piston outer spring (423) |
| • | A stuck or binding 3-4 accumulator piston (428) |
| • | A damaged 3-4 accumulator piston cylinder (421) or O-ring seal (422) |
|
Control Valve Body Assembly
|
| • | Debris in the passages of the control valve body (301) or spacer plate and gasket assembly (396). |
| • | Misassembled 3-4 accumulator valve (339, 350, 351) line-up |
| • | Stuck or binding 3-4 accumulator valve (350) |
| • | Missing, damaged, or misassembled 3-4 accumulator valve spring (351) or retainer (314A) |
|
Driven Sprocket Support Assembly, soft shift only
|
| • | A missing or damaged fourth clutch orifice (607) |
| • | A damaged driven sprocket support assembly (609) |
|
Fourth Clutch Assembly
|
| • | Worn, damaged, or misassembled clutch plates (500-502) |
| • | A missing or not seated fourth clutch spring retaining ring (601) |
| • | A damaged spring assembly (602) or piston (603) |
| • | Worn or damaged fourth clutch piston seals (604, 605) |
|
2-3 Accumulator
| Cut or damaged 2-3 accumulator piston seal (137B)
|
