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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 220 (Automatic Transaxle Diagnosis - 4T65-E) >> Performance Tests >> Road Test >> Manual Gear Range Selection

Manual Gear Range Selection

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Perform test using 10-15 percent throttle angle.

The shift solenoids control the upshifts in the manual gear ranges.

  1. Reverse

    With the vehicle stopped, move the gear selector to Reverse. Slowly accelerate the vehicle. Verify that there is no noticeable slip, noise or vibration.

  1. Manual 1st

    With the vehicle stopped, move the gear selector to 1st. Accelerate the vehicle to 20 MPH. Verify no upshifts occur, the TCC does not apply, and there is no noticeable slip, noise or vibration.

  1. Manual 2nd

    With the vehicle stopped, move the gear selector to 2nd. Accelerate the vehicle to 35 MPH. Verify the 1-2 shift occurs, the 2-3 shift does not occur, and there is no noticeable slip, noise or vibration.

  1. Manual 3rd

    With the vehicle stopped, move the gear selector to 3rd. Accelerate the vehicle to 40 MPH. Verify the 1-2 shift occurs, the 2-3 shift occurs, and there is no noticeable slip, noise or vibration.
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