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Home >> Pontiac >> 2009 >> G8 Base >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 5L40-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Transmission Adaptive Functions >> Coast Downshift Adapt Procedure

Coast Downshift Adapt Procedure

  1. Drive the vehicle in D5 to obtain normal transmission operating temperature.
  2. Travel 73 km/h (45 mph) then lightly brake to a stop, taking about 13 seconds.
  3. Travel 73 km/h (45 mph) then moderately brake to a stop, taking about 6 seconds.
  4. Travel 40 km/h (25 mph) then coast to about 8 km/h (5 mph).

Repeat the above steps 3 times each.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

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