Operation CHARM: Car repair manuals for everyone.

Manual Downshifts

The shift solenoid valves do not control the initial downshift during manual downshifts. All manual downshifts are hydraulic. The solenoid states will change during, or shortly after, a manual downshift is selected.
1. At vehicle speeds of 64-88 km/h (40-55 mph) in Fourth gear, release the accelerator pedal while moving the gear selector to D3. Observe the following results:
- The Torque Converter Clutch (TCC) releases.
- The transmission downshifts to 3rd gear immediately.
2. Move the gear selector back to D4 and accelerate to 64-72 km/h (40-45 mph). Release the accelerator while moving the gear selector to D2 and observe the following results:
- The TCC releases.
- The transmission immediately downshifts to 2nd gear.
- The engine slows the vehicle down.
3. Move the gear selector back to D4 and accelerate to 48 km/h (30 mph). Release the accelerator pedal while moving the gear selector to D1 and observe the following results:
- The TCC releases.
- The transmission immediately downshifts to 2nd gear, then to 1st gear.
- The engine slows the vehicle down.