99crew
Newbie
- Joined
- Aug 8, 2014
- Messages
- 9
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Alright so here's the scoop on my problem. Just had a brand new GM crate motor (454) dropped in my truck and had a tranny flush and filter done at the same time with mobile one full synthetic. The truck will shift into overdrive all day in town. As soon as I hit the highway it shifts to od for about 30 seconds and then reverts back to third and will not go back into od. Driving me nuts. Any suggestions on what it could be?
