BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > What happens if you slip and do 180 degrees, with an automatic gearbox?
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      02-18-2013, 08:34 AM   #1
hwelvaar
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Question What happens if you slip and do 180 degrees, with an automatic gearbox?

With a manual transmisison, when you try a drift but skid and the car turns 180 degrees, your car is then running backwards, and hopefully you have disengaged the clutch, because you are probably still in a forward gear while the car is going backwards. Otherwise, you would damage the clutch. (this is what the instructor told me when I was doing a training on slip and recovery)

Anybody knows how this is handled with an auto gearbox ? Does it auto-disengage, or does the clutch not care about this because the wet plates (or something ) can handle this, or how does this work ?
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      02-18-2013, 09:50 AM   #2
ovekvam
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The F20 does not spin easily out of control. You can bring it back from quite dramatic slip angles. I do however like to pull the hand brake if I see that the car will swap ends. That way, the car will move in a straight and predictable line, and it will only rotate 180 degrees, and not totally out of control.
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      02-18-2013, 10:51 AM   #3
hwelvaar
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Quote:
Originally Posted by ovekvam View Post
The F20 does not spin easily out of control. You can bring it back from quite dramatic slip angles. I do however like to pull the hand brake if I see that the car will swap ends. That way, the car will move in a straight and predictable line, and it will only rotate 180 degrees, and not totally out of control.
Ok, that's about your driving skill and the car behavior, but I want to know what an automatic gearbox does when it was engaged in a forward gear, and 'suddenly' (slip) the car is in fact driving backwards.
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      02-18-2013, 11:06 AM   #4
ovekvam
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Quote:
Originally Posted by hwelvaar View Post
Ok, that's about your driving skill and the car behavior, but I want to know what an automatic gearbox does when it was engaged in a forward gear, and 'suddenly' (slip) the car is in fact driving backwards.
The torque converter will slip. Since it is basically just a propeller blowing oil on another propeller, I don't think it would do much harm. At very high speed, I guess something could go wrong.
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