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Old Nov 22, 2023 | 09:54 PM
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Default C7 shifting

I bought a c7 with automatic car shifts smooth up and Down but last down shift at almost stopped it shifts hard anyone had this before
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Old Nov 23, 2023 | 12:23 AM
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Mine does the same thing.
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Old Nov 23, 2023 | 01:02 PM
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Have dealer or competent shop "Clear Adapts"and perform a "Garage Relearn" procedure, then drive it like you stole it for the next 100 miles as the TCM relearns the correct timing and preasure it will take to perform a perfect upshift and downshift every time
During this period you might feel some sloppy shifts , that's normal
This is common problem with the some "Adaptive Learning" transmissions like the A6 and A8

Dave
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Old Nov 23, 2023 | 03:48 PM
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Originally Posted by dmitch379
I bought a c7 with automatic car shifts smooth up and Down but last down shift at almost stopped it shifts hard anyone had this before
That's not generally a bad thing. It may be an attribute of automatic transmission C7s. 👍

It was definitely a charteristic of Mercedes-Benz automatic transmission automoblies in the "70s and '80s. The "jarring" hit was a sign of a well running Mercedes automatic transmission.
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Old Nov 24, 2023 | 02:18 AM
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Originally Posted by Dcasole
Have dealer or competent shop "Clear Adapts"and perform a "Garage Relearn" procedure, then drive it like you stole it for the next 100 miles as the TCM relearns the correct timing and preasure it will take to perform a perfect upshift and downshift every time
During this period you might feel some sloppy shifts , that's normal
This is common problem with the some "Adaptive Learning" transmissions like the A6 and A8

Dave
That must have been how the first owner drove my car! I do not have any problems as long as I keep the R's up!
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Old Nov 26, 2023 | 11:07 AM
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Might have nothing to do with it, but is the tranny fluid old?
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