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Message: [QUOTE="Diesel1050, post: 1517011, member: 23802"] Hope this is the right forum, haven't been on here for a while. Recently bought an e99 F-250 7.3. Truck has 233k on it, runs like a top. That being said, shifts from 1st to 2nd, and 2nd to 3rd are perfect, has tons of power and no hard shifts, 3rd to O/D however occasionally will shift hard, more so when the TS6 chip is on BUT still does it without the tuner. Not coming up with ANY codes, read with a snap-on solus, and autoenginuity. The O/D light DOES blink BUT that's due to the cluster wiring being messed up (Speedometer only works once in a while). When the Speedometer does work the O/D light shuts off. Replaced vss on rear diff. The big problem is, its shifts 1st, 2nd, 3rd fine but O/D damn near stalls it when it shifts. RPM's drop from 2500+ to 1200 and it barely speeds up until on a flat surface. Almost feels like it skips from 2nd to 4th. When it is in O/D even if you put the pedal to the floor, it doesn't always downshift. Any ideas? Sent from my SM-G930R4 using Tapatalk [/QUOTE]

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