Strange Question about Manual Tranny on e90

camsd85 · 08-11-2005, 07:59 PM

From my understanding there is a mechanism in the E90 that prevents rolling back when starting in 1st gear.

As strange as it may sound, I actually love the rolling back and forth with manual trannies at stop lights and when starting off. How effective is the mechanism...does it completely prevent rolling or only minimally? How does the clutch feel?

David328M-Sport · 08-11-2005, 08:28 PM

The hill assist or hill start system prevents manual tramsmission cars from rolling backwards AND forwards (depending on the position of the car on the hill of course). This lasts about 1.5 to 2 seconds, enogh time for the driver to release the brake pedal, press the go pedal and lift off the clutch pedal to make the car go again without risk of possibly hitting something or someone if co-ordination was a little slow or if object(s) was too close etc.

The car literally holds on to the brakes for this time.

By rolling ther car back & forth, don't you risk wearing the clutch out quicker than one would normally do if you didn't roll around?

Anyway, I have the wonderful Steptronic (sorry manual die hards) and of course there is no need for hill assist.

pharmb · 08-11-2005, 09:17 PM

It only activates when you take your foot off the brake while the clutch pedal is in. Once you start to let off the clutch pedal, the brakes release and do not reactivate unless you press the clutch pedal back in and stop with the brakes. When it does activate, it lasts a few seconds, I tested it out on my driveway.

Armen52 · 08-12-2005, 02:52 AM

Quote:

Originally Posted by David325Australia

Anyway, I have the wonderful Steptronic (sorry manual die hards) and of course there is no need for hill assist.

Oh I'm fairly sure that the hill assist is active in the Steptronic model as well. I have the Step and my car also holds the breaks on hills.

On a steep enough hill, this isn't a bad feature to have on the Step either.

xcalibr · 08-12-2005, 01:29 PM

As soon as you start to release the clutch or start to depress the throttle, it releases... i still do the rolling/clutch hold while impatiently waiting for traffic lights.

ward · 08-12-2005, 01:48 PM

Quote:

Originally Posted by xcalibr

i still do the rolling/clutch hold while impatiently waiting for traffic lights.

that's really good for your clutch

08-11-2005, 07:59 PM	#1
camsd85 Enlisted Member 4 Rep 31 Posts Drives: Join Date: Jun 2008 iTrader: (0)	Strange Question about Manual Tranny on e90 From my understanding there is a mechanism in the E90 that prevents rolling back when starting in 1st gear. As strange as it may sound, I actually love the rolling back and forth with manual trannies at stop lights and when starting off. How effective is the mechanism...does it completely prevent rolling or only minimally? How does the clutch feel?
	Appreciate 0 Tweet Quote

08-11-2005, 08:28 PM	#2
David328M-Sport Brigadier General 101 Rep 3,566 Posts Drives: F30 M-Sport 328i Estoril Blue Join Date: Jun 2005 Location: Melbourne Australia iTrader: (0)	The hill assist or hill start system prevents manual tramsmission cars from rolling backwards AND forwards (depending on the position of the car on the hill of course). This lasts about 1.5 to 2 seconds, enogh time for the driver to release the brake pedal, press the go pedal and lift off the clutch pedal to make the car go again without risk of possibly hitting something or someone if co-ordination was a little slow or if object(s) was too close etc. The car literally holds on to the brakes for this time. By rolling ther car back & forth, don't you risk wearing the clutch out quicker than one would normally do if you didn't roll around? Anyway, I have the wonderful Steptronic (sorry manual die hards) and of course there is no need for hill assist. __________________ 328i M-Sport, Estoril Blue, Carbon XP 35 Tint, front heated seats, black Dakota, Sports Suspension, Anthracite Headliner, HUD, Pro Nav, Sunroof, hk 600w, Bi-Xenon, 19" 403M wheels, Reversing Camera, DAB+, Xenon, BT Ext Connect, MST turbo intake pipe, MST Cold Air Intake, JB4 on Map 2 with Catless DP produces awesome performance in Sport.
	Appreciate 0 Quote

08-11-2005, 09:17 PM	#3
pharmb Enlisted Member 0 Rep 47 Posts Drives: X5 4.4i/ 330i Join Date: Jul 2005 Location: Vero Beach, FL iTrader: (0)	It only activates when you take your foot off the brake while the clutch pedal is in. Once you start to let off the clutch pedal, the brakes release and do not reactivate unless you press the clutch pedal back in and stop with the brakes. When it does activate, it lasts a few seconds, I tested it out on my driveway.
	Appreciate 0 Quote

08-12-2005, 01:29 PM	#5
xcalibr First Lieutenant 18 Rep 370 Posts Drives: E90 325xi Join Date: Jun 2005 Location: Fremont, CA iTrader: (4) Garage List 2006 E90 325xi [0.00]	As soon as you start to release the clutch or start to depress the throttle, it releases... i still do the rolling/clutch hold while impatiently waiting for traffic lights.
	Appreciate 0 Quote