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S550 Automatic Track Day/AutoX

Has anyone tracked or autoX the new S550 with the automatic? How has it held up? Any transmission heat issues?
 

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In my experience, depending on the track, it'll do fine on a track day if you shift it manually, literally just like a manual, so it's ready for the gear you need when you come out of a corner. If you let it shift itself, so that it shifts down coming out of corners all the time, it'll go into limp mode pretty quickly. If it's a nice long flowing track, probably doesn't matter. If it's a shorter track with lots of corners, shift it manually.
 

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Yeah, shift it manually and you'll be ok. Most automatics will overheat on the track if left to shift as they please. Downshift as you are slowing down for a turn (before you turn the wheel), not during the turn or as you're coming out.
In autox you should pretty much be able to do the whole course in one or two gears max.
 
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