Quote:
Originally Posted by SDT1DYI
Decided to change the screw on external transmission filter during other maintenance work on my 2018 3500 Duramax.
Purchased a well know house brand replacement filter . Immediately experienced down shifting problems. Purchased a GM filter from the dealer @ a 34.00 cost.
Problems ended. Going to purchase a couple of more for inventory.
Be aware if you have late model Duramax tow rig.
Steve Teeter. STK 6380/6283
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This is interesting ! Did you change the Fluid when you put the aftermarket filter in ? What happened when you say you had down shifting problems ? Did the problems go away immediately when you installed the GM filter ?