|
|
Content .. 2452 2453 2454 2455 ..
z The TCC releases z The transmission downshifts immediately to SECOND gear z The engine slows the vehicle Manual 4-1 Downshift 1. Place the gear selector in the OVERDRIVE position. 2. Accelerate the vehicle to 48 km/h (30 mph). 3. Release the throttle while moving the gear selector to FIRST. 4. Verify the following: z The TCC releases. z The transmission downshifts immediately to FIRST gear. z The engine slows the vehicle. Coasting Downshifts 1. Place the gear selector in the OVERDRIVE position. 2. Accelerate the vehicle to FOURTH gear with the TCC applied. 3. Release the throttle and lightly apply the brakes. 4. Verify the following: z The TCC releases z Downshifts occur at speeds shown in the Shift Speed table. Refer to Shift Speed . Manual Gear Range Selection The shift solenoids control the upshifts in the manual gear ranges. Perform the following tests using 10-15 percent throttle angle. Reverse 1. With the vehicle stopped, move the gear selector to REVERSE. 2. Slowly accelerate the vehicle. 3. Verify that there is no noticeable slip, noise or vibration. Manual First 1. With the vehicle stopped, move the gear selector to FIRST. 2. Accelerate the vehicle to 32 km/h (20 mph). 3. Verify the following: z No upshifts occur
2004 Hummer H2 2004 TRANSMISSION Automatic Transaxle - 4L60-E/4L65-E (Troubleshooting)
|