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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 153 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Service, Diagnosis & Troubleshooting) >> Road Test >> Manual Gear Range Selection

Manual Gear Range Selection

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

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:
    • No upshifts occur.
    • The TCC does not apply.
    • There is no noticeable slip, noise, or vibration.

Manual Second

  1. With the vehicle stopped, move the gear selector to SECOND.
  2. Accelerate the vehicle to 57 km/h (35 mph).
  3. Verify the following:
    • The 1-2 shift occurs.
    • The 2-3 shift does not occur.
    • There is no noticeable slip, noise or vibration.

Manual Third

  1. With the vehicle stopped, move the gear selector to THIRD.
  2. Accelerate the vehicle to 64 km/h (40 mph).
  3. Verify the following:
    • The 1-2 shift occurs.
    • The 2-3 shift occurs.
    • There is no noticeable slip, noise or vibration.
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