gearbox problem

ahtim · 06-02-2013, 10:08 AM

HI guys, my car has done 2200km, with run in service done, however when i drive change from 1st gear to 2nd gear, if i step on the clutch quickly it make some strange sound, but if i apply clutch pedal slowly, its fine.
anyone experience this?

Also i am running PSS with 38,40psi (fullyloaded psi) i feel that the car is very jumpy, shall i lower to stock lowest setting?

Many thanks

ahtim · 06-02-2013, 12:32 PM

Anyone please?

ozinaldo · 06-02-2013, 01:02 PM

I don't think the problem you described is related to tire pressures but I also don't get why you keep the pressure that high. Is that cold pressure and for a car with just driver or a single passenger? If so, then it is too high for normal use, stick with 34 front and 32 rear, the jerky ride should ease.

Dackelone · 06-02-2013, 01:22 PM

I would have your dealer(or indi shop) bleed your hydraulic clutch lines. You might as well have them do the brakes too. Maybe there is some air in the clutch system.

Some 1M's have had bad real crankshaft main seal. Some leak oil, but a lot of them just make a "fluttering" sound on decel revs. ~2,300 rpms to idle. It doesn't sound like this is your issue though. My 135i makes this noise. It doesn't bother me enough to pull the trans and mess with it. I'll replace it when my clutch goes.

As for your tire pressures... I also run very high pressures like what you run. I normally run 2.3 and 2.8 bar(front and rear onj my 135i with 18's). But I do a lot of high speed autobahn driving... so lowering your tire pressure will do wonders for the way your car rides.

Jay-K · 06-03-2013, 09:49 AM

its like some noise when we hit the clutch pedals fast right.. i think i have it to, but i wouldnt see it as a problem since our car is a manual..
i think its normal though..

Artemis · 06-03-2013, 01:29 PM

Quote:

Originally Posted by Dackelone

As for your tire pressures... I also run very high pressures like what you run. I normally run 2.3 and 2.8 bar(front and rear). But I do a lot of high speed autobahn driving... so lowering your tire pressure will do wonders for the way your car rides.

Here is a picture of the 1M tire pressure sticker:

According to the 1M tire pressure sticker:

2.3 front + 2.2 rear is recommended for 1 person inside the car (summer tires);
2.6 front + 2.8 rear is recommended when loaded (summer tires).

Recently I put 2.6 bar on the front + rear tires for the Summer (fitted my stock Michelin PS2 tires on my BBS CH-R alloys - my stock 1M alloys [359M] have now become my winter alloys). Just me inside the car most drives. I guess 2.6 all round is okay, no ?

Dackelone · 06-03-2013, 01:33 PM

I always drive alone too. But I always set my pressures to MAX load for better high speed feel.

Luc, I think I would use 2.6/2.8 bar.

Hofeistos1M · 04-07-2014, 12:23 PM

@Artemis
Referring to your picture of tire pressure sticker, have you made another shot that include all the labels and the lock striker in one picture. I have looking all over the Internet for that photo and not found that. I have to know what kind of labels I need to order and where those should be paste.

gazz · 04-08-2014, 06:36 PM

The noise could be a bit of diff clunk if you miss-time your gear change. "if i step on the clutch quickly" may mean that you are also coming off the gas too quickly before disengaging the clutch thereby producing some snatch in the driveline, an effect more noticeable in first gear.

06-02-2013, 10:08 AM	#1
ahtim Akrapovic HK 68 Rep 265 Posts Drives: mostly NA, sometimes turbo Join Date: Oct 2008 Location: Hk/ China / UK iTrader: (0)	gearbox problem HI guys, my car has done 2200km, with run in service done, however when i drive change from 1st gear to 2nd gear, if i step on the clutch quickly it make some strange sound, but if i apply clutch pedal slowly, its fine. anyone experience this? Also i am running PSS with 38,40psi (fullyloaded psi) i feel that the car is very jumpy, shall i lower to stock lowest setting? Many thanks
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06-02-2013, 12:32 PM	#2
ahtim Akrapovic HK 68 Rep 265 Posts Drives: mostly NA, sometimes turbo Join Date: Oct 2008 Location: Hk/ China / UK iTrader: (0)	Anyone please?
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06-02-2013, 01:02 PM	#3
ozinaldo Brigadier General 116 Rep 3,070 Posts Drives: 1M Join Date: Jan 2011 Location: Lisbon, Portugal iTrader: (0)	I don't think the problem you described is related to tire pressures but I also don't get why you keep the pressure that high. Is that cold pressure and for a car with just driver or a single passenger? If so, then it is too high for normal use, stick with 34 front and 32 rear, the jerky ride should ease. __________________ "The mark of a great car is one whose overall competence exceeds what you should expect from its individual components and the 1M does just that", Chris Harris. BMW 1M-SOLD-: TECH: Evolve Race+N55mids, Evolve IC, Michelin PSS, ER cp, aFe filter, CDVx, Vorshlag camber plates, BMS OCC EXTERIOR: trunk spoiler, blacklines, black grills, IND goodies INTERIOR: Alcantara steering wheel, steel pedals, custom mats, MPower e-brake.
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06-02-2013, 01:22 PM	#4
Dackelone European Editor 10539 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	I would have your dealer(or indi shop) bleed your hydraulic clutch lines. You might as well have them do the brakes too. Maybe there is some air in the clutch system. Some 1M's have had bad real crankshaft main seal. Some leak oil, but a lot of them just make a "fluttering" sound on decel revs. ~2,300 rpms to idle. It doesn't sound like this is your issue though. My 135i makes this noise. It doesn't bother me enough to pull the trans and mess with it. I'll replace it when my clutch goes. As for your tire pressures... I also run very high pressures like what you run. I normally run 2.3 and 2.8 bar(front and rear onj my 135i with 18's). But I do a lot of high speed autobahn driving... so lowering your tire pressure will do wonders for the way your car rides. __________________ Dackel's European Delivery Museum Guide
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06-03-2013, 09:49 AM	#5
Jay-K Brigadier General 384 Rep 3,450 Posts Drives: Slow Join Date: Nov 2011 Location: LA iTrader: (0)	its like some noise when we hit the clutch pedals fast right.. i think i have it to, but i wouldnt see it as a problem since our car is a manual.. i think its normal though..
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06-03-2013, 01:33 PM	#7
Dackelone European Editor 10539 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	I always drive alone too. But I always set my pressures to MAX load for better high speed feel. Luc, I think I would use 2.6/2.8 bar. __________________ Dackel's European Delivery Museum Guide
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04-07-2014, 12:23 PM	#8
Hofeistos1M Registered 0 Rep 2 Posts Drives: VO 1M Join Date: Apr 2014 Location: Sweden iTrader: (0)	@Artemis Referring to your picture of tire pressure sticker, have you made another shot that include all the labels and the lock striker in one picture. I have looking all over the Internet for that photo and not found that. I have to know what kind of labels I need to order and where those should be paste.
	Appreciate 0 Quote

04-08-2014, 06:36 PM	#9
gazz ///Mbassador 26 Rep 1,069 Posts Drives: The horse I fell off Join Date: Apr 2007 Location: Gold Coast Australia iTrader: (0)	The noise could be a bit of diff clunk if you miss-time your gear change. "if i step on the clutch quickly" may mean that you are also coming off the gas too quickly before disengaging the clutch thereby producing some snatch in the driveline, an effect more noticeable in first gear.
	Appreciate 0 Quote