WOT on xDrive

Prak903 · 05-08-2023, 04:39 PM

Hey guys, have an xdrive 440i. Was messing around with xHP and flashed some changes last week. Ever since then when going WOT from a roll/dig it almost feels like the power is going straight to the rear wheels, the front wheels almost feel like they are slightly off ground (steering gets looser). I'm assuming that flashing again reset the transmission adaptations, but I've never felt this before when going WOT. Any ideas, or is this just how it should feel?

TIA!

Skyhigh · 05-11-2023, 08:45 AM

xHP does not affect the xDrive in any way.... The TCU of the xDrive is a completely independent unit and software.

You may have affected traction in general with xHP... that's possible, bot not the characteristics of xDrive, in terms of distribution...

Prak903 · 05-11-2023, 12:48 PM

Quote:

xHP does not affect the xDrive in any way.... The TCU of the xDrive is a completely independent unit and software.

Quote:

You may have affected traction in general with xHP... that's possible, bot not the characteristics of xDrive, in terms of distribution...

Thanks Skyhigh. Maybe I had too much torque from launches and caused the rear wheels to slip, hence would activate front wheels for slip situation.

Skyhigh · 05-11-2023, 12:50 PM

During hard acceleration, it is normal to feel less weight on the front wheels and steering… simply because there is less weight on the front axle

lattwood · 05-18-2023, 07:11 AM

Check your front dampers for wear, when this started happening to me shortly afterwards a front damper started to leak.

05-08-2023, 04:39 PM	#1
Prak903 Second Lieutenant 188 Rep 274 Posts Drives: 2018 440i xDrive Gran Coupe Join Date: May 2022 Location: Chicago, IL / Milwaukee, WI iTrader: (0) Garage List 2018 BMW 440i xDriv ... [9.50]	WOT on xDrive - Front lifts up? Hey guys, have an xdrive 440i. Was messing around with xHP and flashed some changes last week. Ever since then when going WOT from a roll/dig it almost feels like the power is going straight to the rear wheels, the front wheels almost feel like they are slightly off ground (steering gets looser). I'm assuming that flashing again reset the transmission adaptations, but I've never felt this before when going WOT. Any ideas, or is this just how it should feel? TIA!
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05-11-2023, 08:45 AM	#2
Skyhigh Brigadier General 1890 Rep 3,877 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	xHP does not affect the xDrive in any way.... The TCU of the xDrive is a completely independent unit and software. You may have affected traction in general with xHP... that's possible, bot not the characteristics of xDrive, in terms of distribution... __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
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05-11-2023, 12:50 PM	#4
Skyhigh Brigadier General 1890 Rep 3,877 Posts Drives: BMW F36 Join Date: Apr 2018 Location: Europe iTrader: (0)	During hard acceleration, it is normal to feel less weight on the front wheels and steering… simply because there is less weight on the front axle __________________ "Large increases in cost with questionable increases in performance can be tolerated only in cars and women."
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05-18-2023, 07:11 AM	#5
lattwood Registered 0 Rep 3 Posts Drives: BMW 435ix Join Date: Jul 2022 Location: Canada iTrader: (0)	Check your front dampers for wear, when this started happening to me shortly afterwards a front damper started to leak.
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