Harsh Garage Shift
WARNING: This page is about a different variant/trim than selected.
Harsh Garage Shift
| Checks |
Causes |
NOTE:
On cold days, approximately 32°F (0°C) or colder, the transmission is designed to shift differently. The transmission uses a warm-up mode shift schedule until the engine reaches normal operating temperature. While the transmission is in warm-up mode, it is normal for transmission upshifts to be delayed or held longer. This feature improves heater performance by giving quicker vehicle warm-ups.
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| Engine |
Elevated engine RPM - Verify correct engine operating rpm per application. |
| A/Trans Fluid Pump Cover Assembly (219) |
- Inspect for damaged, stuck, sticky pressure regulator valve (233) and springs (234 and 235).
- Inspect for damaged, stuck, sticky isolator valve (236) and sleeve (237).
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| Control Valve Solenoid Body (314) |
- Incorrect or inadequate adapt activity - Perform Reset Transmission Adapts procedure.
- Incorrect TCM temperature reporting - Monitor TCM temperature using Tech 2.
- Line pressure control solenoid incorrect pressure.
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| 1-2-3-4 and 3-5-R Clutch (51) |
- Inspect for damaged 1-2-3-4 clutch piston (414), piston housing (417), spring (413), and dam assembly (412).
- Inspect for cut, worn, or damaged 1-2-3-4 clutch piston seal (416), inner seal (423), and housing seals (424 and 425).
- Inspect for improper selective 1-2-3-4 clutch backing plate retaining ring (429).
- Inspect for damaged 3-5-R clutch piston (421), apply ring (405), and spring (420).
- Inspect for cut, worn, or damaged 3-5-R clutch piston dam O-ring seal (418), inner seal (419), and outer seal (422).
- Inspect for improper selective 3-5-R clutch backing plate retaining ring (400).
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