![]() Install the transmission fluid pan and refill with new Mobil 1 Synthetic LV ATF DEXRON HP transmission fluid following the Fluid Fill Procedure in SI ◦ C.) Clean the pan/magnet if any metallic particles present and replace transmission filter. Follow Both SI Procedures for “Cooling System Leak Testing” and “Engine Coolant/Water in Transmission.” Note: If you find that the fluid is cloudy, milky, or appears to be contaminated with water or engine coolant, DO NOT proceed with below steps. ◦ B.) Remove the transmission fluid pan and drain transmission fluid following SI procedures for the application you’re working on. ◦ A.) Use filtered compressed air regulated to 60 psi to remove transmission fluid from the transmission oil cooler lines. Drain, Clean pan/magnet, Replace Filter, Oil Fill, & Remove fluid from the oil cooler lines. The General Motors oil distributor request Mobil 1 Synthetic LV ATF DEXRON HP.Ĭanadian dealers must order part number 19355657 through Kem Krest Canada.ġ. dealers must order the Mobil 1 Synthetic LV ATF DEXRON HPįluid through your local General Motors oil distributor. Requires Mobil 1 Synthetic LV ATF DEXRON HP transmission fluid. Vibrations not identified as TCC Shudder should be further investigated using the Vehicle Vibration Diagnosis in SI as a starting point. If the concern is still present with the torque converter clutch disabled (Mode B) or with the torque converter clutch enabled (Mode C, TCC slip speed at zero), then the vibration root cause is NOT TCC Shudder. If the concern is not present in Mode A, then the vibration concern is NOT TCC shudder. If the concern is gone with the torque converter clutch disabled (Mode B, TCC Open) and is gone with torque converter clutch enabled (Mode C, TCC Locked), then the vibration root cause is TCC Shudder, and the fluid flush procedure corrective action described below should be performed. ![]() To confirm TCC Shudder, the vibration concern must be created in normal operation (Mode A) of the test. GDS2 Commanding TCC in Enabled Operation. ![]() GDS2 Commanding TCC in Disabled Operation. Normal Operation (GDS2 for viewing only).ī. Run the following tests for 3 operational modes:Ī. Important: For some road conditions, it may be required to apply the brake pedal and throttle simultaneously to stay within desired gear, engineįiring mode, engine torque range, and engine/vehicle speed ranges.įor Full Size Trucks/SUVs– Press and hold the tow-haul mode button for 5 seconds to disable grade braking to prevent downshifts during test. To ensure TCC Shudder is diagnosed correctly, please drive the following schedule on a smooth road with transmission sump temperature between Shudder feeling is evident in both Drive and M7 MY15-16 &L7 MY17 and MY18 Mode.A shudder feeling that may be described as driving over rumble strips or rough pavement.A shake and or shudder during light acceleration between 25 and 80 mph steady state driving when transmission is not actively shifting gears.Some customers may comment on any of the following conditions: ![]() Shake and/or shudder during light acceleration between 25 and 80 MPH at a steady state. There is a TSB – Technical Service Bulletin out on this issue. However the better course of action would be to have the transmission fluid replaced with the correct type. They do sell a corrective additive called Shudder Fix. If I had to guess I would say that the transmission was serviced with the wrong type of transmission fluid. Transmission seems to “stutter” at 20-25 ph and 40-45 ph ![]()
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