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6.4 hemi not shifting into 8
I just bought a 2024 and am having the same problems. I previously had a 2019 6.4 hemi 8 speed that would shift to 8th at a much lower rpm, and I got much better fuel mileage. I believe the engineers have changed the shift points. The motor will break in and improve MPG around 10,000 miles...- 24hemi
- Post #23
- Forum: 6.4 Hemi V8