Those 20-30 degree incline driveways

ES_TRADER · 05-07-2011, 09:19 AM

When pulling into parking lots or supermarket plazas from the street and I go up those driveways or inclines, about 2 out of 10 times, depending on how steep it is, going very slow, I feel a thump in the rear of the car, or like a slight jerk. It feels like the rear is slipping or losing traction. I'm not sure what it is. Is it the differential?

Anyone ever experience this? Sorry if this is vague but it's hard to explain in writing.

Draper · 05-07-2011, 09:56 AM

I've noticed this sometimes as well.

Not sure what it is though.

llis · 05-07-2011, 10:06 AM

DCT downshift?

Draper · 05-07-2011, 10:07 AM

Quote:

Originally Posted by llis

DCT downshift?

Not for me - I have a 6MT.

Richbot · 05-07-2011, 10:59 AM

Rear wheel leaving the ground most likely. These cars have a fair amount of rear swaybar

ES_TRADER · 05-07-2011, 10:59 AM

Quote:

Originally Posted by llis

DCT downshift?

No its not this as usually already in 1st gear as i go up the driveway...i go really slow..when i go fast, i dont hear it...its wierd..the angle and incline has to be just right to produce this odd slipping effect/feeling so its not 100% of the time but something that irritates me when it happens

PatsE92 · 05-07-2011, 02:03 PM

Diff locking as previously posted one of your wheels is losing traction due to angle of approach. My driveway is the same (+25 degree incline) and I cannot comfortably approach head on. I get the thump every time.

BPMSport · 05-07-2011, 10:36 PM

Totally normal... Happens to me.

It's because a wheel comes off the ground and then catches.

TX · 05-07-2011, 11:08 PM

I have it too on my 6MT. I assume it's diff slip.

rbk1115 · 05-08-2011, 12:30 AM

Quote:

Originally Posted by Richbot

Rear wheel leaving the ground most likely. These cars have a fair amount of rear swaybar

+1

Happens to me too...

1sikbmr · 05-08-2011, 02:45 AM

Quote:

Originally Posted by Mike@Powerchip

Totally normal... Happens to me.

It's because a wheel comes off the ground and then catches.

+1

tha_good_life · 05-08-2011, 03:33 AM

Quote:

Originally Posted by Mike@Powerchip

Totally normal... Happens to me.

It's because a wheel comes off the ground and then catches.

how does the wheel come off the ground when you are going up an incline driveway?

1sikbmr · 05-08-2011, 03:41 AM

Quote:

Originally Posted by bapesta206

how does the wheel come off the ground when you are going up an incline driveway?

When going on up on an angle one wheel will slip a little because it is coming off the ground.

05-07-2011, 09:19 AM	#1
ES_TRADER Colonel 344 Rep 2,928 Posts Drives: 328i, 335i, M3, 535i, X5, 36M Join Date: Oct 2010 Location: OC iTrader: (3) Garage List 2014 Ford Raptor [0.00] 2012 328i E92 [10.00] 2013 X5 [0.00] 2013 335i F30 [8.00] 1990 Toyota Previa [0.00] 1997 E36 M3 [10.00] 2011 E92 M3 [0.00] 2011 535i [0.00]	Those 20-30 degree incline driveways When pulling into parking lots or supermarket plazas from the street and I go up those driveways or inclines, about 2 out of 10 times, depending on how steep it is, going very slow, I feel a thump in the rear of the car, or like a slight jerk. It feels like the rear is slipping or losing traction. I'm not sure what it is. Is it the differential? Anyone ever experience this? Sorry if this is vague but it's hard to explain in writing.
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05-07-2011, 09:56 AM	#2
Draper Brigadier General 3467 Rep 3,999 Posts Drives: M4 Comp / Macan Turbo Join Date: Jan 2011 Location: Denver iTrader: (38)	I've noticed this sometimes as well. Not sure what it is though. __________________ Current: G82 M4 Comp xDrive // Frozen Deep Grey Current: 95B.1 Macan Turbo // Dark Blue Metallic - for sale
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05-07-2011, 10:06 AM	#3
llis octane chick 81 Rep 1,187 Posts Drives: ex-M Join Date: Oct 2010 Location: Colorado iTrader: (1) Garage List 2013 BMW M3 ZCP [10.00] 2003 BMW M5 [0.00]	DCT downshift?
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05-07-2011, 10:59 AM	#5
Richbot Major General 2761 Rep 5,482 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	Rear wheel leaving the ground most likely. These cars have a fair amount of rear swaybar __________________
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05-07-2011, 02:03 PM	#7
PatsE92 Private 4 Rep 99 Posts Drives: 2010 E92 M3 Join Date: Oct 2006 Location: Lafayette, LA iTrader: (0)	Diff Diff locking as previously posted one of your wheels is losing traction due to angle of approach. My driveway is the same (+25 degree incline) and I cannot comfortably approach head on. I get the thump every time. __________________ ____________________________________________
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05-07-2011, 10:36 PM	#8
BPMSport BimmerPost Supporting Vendor 3388 Rep 7,542 Posts Drives: Harrop M3 / F10 M5 / F82 M4 Join Date: Apr 2008 Location: SoCal iTrader: (9) Garage List 2000 BMW M5 [0.00] 1990 BMW 735i Turbo [0.00] 2008 BMW M3 [7.50] 2015 BMW M3 [0.00] 2015 BMW M5 [0.00]	Totally normal... Happens to me. It's because a wheel comes off the ground and then catches. __________________ -----\| Like us on Facebook \| Instagram \|\| Tuning Information \| Remote Coding \|----- ----Visit us at www.BPMSport.com - Emotion. Driven. \| Toll Free: (888) 557-5133----
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05-07-2011, 11:08 PM	#9
TX Captain 366 Rep 860 Posts Drives: 2009 ///M3 E92 APW 6MT Join Date: Dec 2010 Location: South FL iTrader: (0)	I have it too on my 6MT. I assume it's diff slip. __________________
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