Checking the Gear System

Problems that the customer may experience are hard shifts or slipping shifts. The following test-drive contains several different driving situations that may provoke these symptoms if the transmission is damaged.

Test 1 

1. Driving at 100 km/h, 6th gear.
2. Perform a kickdown to 4th gear.
3. Let the transmission automatically shift up to 5th gear.
4. Let up the accelerator pedal and let the transmission shift up to 6th gear.

Test 2 

1. Driving at 100 km/h, 6th gear.
2. Slight uphill grade, press accelerator pedal until you obtain shifting 6-5, not kickdown.

Test 3 

1. Driving at 80 km/h.
2. Move the gear selector to position M and engage 6th gear.
3. Perform a kickdown and shift 6-5, 5-4, 4-3 at the same time.
4. Then upshift immediately to 6th gear.

Test 4 

1. Stationary vehicle, engine running, parking brake applied, brake activated with left foot, gear selector in position R.
2. Press down the accelerator pedal (brake still activated).
   NOTE: Let up the accelerator pedal in case of noise or slipping.

Test 5 

1. Stationary vehicle, engine running, parking brake applied, brake activated with left foot, gear selector in position D.
2. Press down the accelerator pedal (brake still activated).
   NOTE: Let up the accelerator pedal in case of noise or slipping.

If the symptoms hard shifts or slipping shifts arise during the test-drive, the transmission's control system must be replaced.

• See Control System, Replacing 

Is the function OK? 

• YES 

  Refer to Fault-Tracing Information .

• NO 

  Refer to Transmission Control System, Replacing .