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Old 10-23-2018, 03:17 PM
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Auto Trans upshifting early?

Hey Everyone,

I've always noticed that while normally driving, the transmission likes to keep higher gears, nothing unusual, but almost always around 1k-1500rpm, and when the road starts getting gradually steeper, it doesn't downshift, to the point where it feels like the engine is lugging. Most often at local street speeds, around 30-40mph. All this time I'm slowing increasing throttle, then suddenly it'll downshift from 5th to 3rd or 4th to 2nd and then go, and it seems like its over reacting. Most times when I come to those types of roads I end up manually downshifting it to 4th to get the revs and power back up.

Has anyone else experienced this? 2004 4.8is, 124k miles. When I got it at 108k, we had AT filter, fluid replaced, next time looking to do the mechatronic seals. No firmware updates.

I've always had this issue but just never bothered to ask about it until I recently moved and our new neighborhood has a hill on the way home that gets gradually steeper to pretty steep and every day I end up having to manually downshift to avoid the two step down shift.
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Old 10-23-2018, 10:00 PM
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Does it seem to have a delayed shift in sport mode too?

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Old 10-23-2018, 10:03 PM
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Quote:
Originally Posted by EODguy View Post
Does it seem to have a delayed shift in sport mode too?

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Nope, in sport mode it shifts at high rev and doesn't allow the engine to get down below 1500rpm. Shifts are quick and normal, no delay in the actual shift itself, just the shift point!
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Old 11-03-2018, 11:24 PM
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Pretty normal I’d say. I test drove several X5s and they’re all TERRIBLE with downshifting when the road steepens. It’s even worse if you have your cruise control set for 35 mph and the road steepns, the gearbox slams into a Lower gear and the engine races and takes off until it hits your desired speed. It then goes to highest gear possible. A few seconds later the engine can no longer produce the required torque and the car slows. Then it slams into a lower gear, takes off, rinse & repeat
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