SMG 'clunk' - Page 2

petery · 14-12-2013, 09:00 PM

I never lift and my clutch is on 76k miles and still working fine

ZKMI · 15-12-2013, 12:20 AM

Thats good news.

Thanks again.

shane@mbtech · 15-12-2013, 12:24 AM

Jim lifts all the time, mostly shirts though

ZKMI · 15-12-2013, 01:31 AM

Lol.

Can someone explain in an easy way what the noise is if you dont lift and what is actually happening back there?

adem.csl · 15-12-2013, 02:18 AM

Simple.the gear change is soo instant that the diff knocks a bit the same as if you go from 2nd to 3rd and just throw ya foot off the clutch!its normal for a bit of knock under hard acceleration
You only need to worry if you got the box on its top setting and you go from 3 to 4 and get a screach this is because the box cant engage the syncromesh as quick as the electronic parts want too!!
Don't lift the smg is designed to change gear with the throttle fully depressed it can shut the throttle soo quick while changing gear you won't notice it
You won't have a problem with the clutch if you lift while changing it don't bother the engine cos it changes at its own rate anyway

ZKMI · 15-12-2013, 02:32 AM

Superb.

So either way is fine.. but its best to NOT lift.

Thanks again.

adem.csl · 15-12-2013, 03:36 AM

I don't
But my gearbox has a problem with 4th along with a couple other members!!!
Only when its proper hot and your really using it!!normal conditions its ok

73CSL · 15-12-2013, 09:32 AM

if you lift, I gather you can get clutch slur

I drive mine with full throttle changes & box in S5 , pretty much all the time

When I have the wife in the car , or the roads are wet & slippy I drive the car a lot more relaxed but still change gear without lifting , but the throttle might be at anything between 10% - 100% pressed ... I have found after a while , when I next go for a full throttle redline change in say 3rd, it picks up a slight amount of slur ....... 10 minutes of thrashing & it reverts back to 'normal'

Assume this is the software 'learning' & adapting for driving style ? If it is, would love a method of overriding

**glendog74** · 15-12-2013, 09:58 AM

Quote:

Originally Posted by lawsy

Jim lifts all the time, mostly shirts though

**CraigMillwardCroft** · 15-12-2013, 10:16 AM

Quote:

Originally Posted by lawsy

Jim lifts all the time, mostly shirts though

15-12-2013, 02:18 AM	#15
adem.csl S5, Sport On, DSC M-track Join Date: Sep 2012 Location: north london Posts: 1,012 Casino cash: $7218	Simple.the gear change is soo instant that the diff knocks a bit the same as if you go from 2nd to 3rd and just throw ya foot off the clutch!its normal for a bit of knock under hard acceleration You only need to worry if you got the box on its top setting and you go from 3 to 4 and get a screach this is because the box cant engage the syncromesh as quick as the electronic parts want too!! Don't lift the smg is designed to change gear with the throttle fully depressed it can shut the throttle soo quick while changing gear you won't notice it You won't have a problem with the clutch if you lift while changing it don't bother the engine cos it changes at its own rate anyway __________________ Bmw in the blood!! Last edited by adem.csl; 15-12-2013 at 02:23 AM.

15-12-2013, 03:36 AM	#17
adem.csl S5, Sport On, DSC M-track Join Date: Sep 2012 Location: north london Posts: 1,012 Casino cash: $7218	I don't But my gearbox has a problem with 4th along with a couple other members!!! Only when its proper hot and your really using it!!normal conditions its ok __________________ Bmw in the blood!!

14-12-2013, 09:00 PM	#11
petery S3 - On the open road Join Date: Sep 2010 Location: oxfordshire Posts: 109 Casino cash: $7423	I never lift and my clutch is on 76k miles and still working fine

15-12-2013, 12:20 AM	#12
ZKMI S4 - Getting the hang of it Join Date: Nov 2013 Posts: 164 Casino cash: $3625	Thats good news. Thanks again.

15-12-2013, 12:24 AM	#13
shane@mbtech CSL Register Uber-poster! Join Date: Feb 2009 Location: warrington Posts: 5,419 Casino cash: $19783	Jim lifts all the time, mostly shirts though

15-12-2013, 01:31 AM	#14
ZKMI S4 - Getting the hang of it Join Date: Nov 2013 Posts: 164 Casino cash: $3625	Lol. Can someone explain in an easy way what the noise is if you dont lift and what is actually happening back there?

15-12-2013, 02:32 AM	#16
ZKMI S4 - Getting the hang of it Join Date: Nov 2013 Posts: 164 Casino cash: $3625	Superb. So either way is fine.. but its best to NOT lift. Thanks again.

15-12-2013, 09:32 AM	#18
73CSL S5 - Full Throttle Join Date: Feb 2013 Location: North Yorkshire Posts: 464 Casino cash: $8747	if you lift, I gather you can get clutch slur I drive mine with full throttle changes & box in S5 , pretty much all the time When I have the wife in the car , or the roads are wet & slippy I drive the car a lot more relaxed but still change gear without lifting , but the throttle might be at anything between 10% - 100% pressed ... I have found after a while , when I next go for a full throttle redline change in say 3rd, it picks up a slight amount of slur ....... 10 minutes of thrashing & it reverts back to 'normal' Assume this is the software 'learning' & adapting for driving style ? If it is, would love a method of overriding