The only thing I find on this is for 2005 trucks (and I've never had this problem). It's caused by a cold start followed by a rapid gear engagement and there's a TSB calling for a PCM reflash to correct it. Since you have a later model truck, I can't see this applying.
But, WHY did you switch to a Level 1 tune if the Level 2 tune was working properly? Unless you "customized" it, the Level 1 tune effects only your transmission. If you customize it, all bets are off. Personally, I'd switch back to the Level 2 tune and be happy.
- Jack
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2024 F150 Platinum SCrew 3.5L PowerBoost FX4, Peragon Tonneau Cover, LineX Bed, 35% Window Tint on All Sides and Rear, Full Nose Paint Protection Film, Husky Mud Guards, Lasfit Floor Liners, VIOFO Dash Cam
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