More gear selection issues - advice please? - Page 2

DuncanR · 16-04-2012, 11:45 AM

Oh dear ... absolutely gutted ... I have to say farewell to my old gearbox the very last original large item left of the car other than the bodyshell !

...sadly its being replaced under warranty by a brand new one by ELMS

.... what a class operation they run , with some really great people !

Bounce · 16-04-2012, 01:12 PM

Quote:

Originally Posted by DuncanR

Oh dear ... absolutely gutted ... I have to say farewell to my old gearbox the very last original large item left of the car other than the bodyshell !

...sadly its being replaced under warranty by a brand new one by ELMS

.... what a class operation they run , with some really great people !

Nice one Dunc.

**shimmy** · 16-04-2012, 01:33 PM

Quote:

Originally Posted by Bounce

Nice one Dunc.

Welcome a new gearbox to the Register.

conleth m3 · 16-04-2012, 11:18 PM

i have this problem as well. up until recently only happened as others have said, on track and when pushing on. happened abit more when on my ring trip at easter. took car to tom schirmer on kelburg who knows his stuff. he said you can try to bleed the clutch fluid, but didnt really know why it happens. he said it has happened on some of their race cars on one weekend, did nothing in between and was perfect the weekend after.

also, sorry dunc, he said a customer had had 2 replacement gearboxes under warranty and was still happening, and that bmw didnt know why it happened.

sounds like it should be something like a synchro or selector issue, but i dunno

has happened to me recently changing down from 5th to 4th as well, also from 3rd to 4th when not pushing at all on road in auto mode (level 2 - so not remotely aggressive) these times the car went into limp home mode for about 20 secs and also brought on smg yellow cog, which went out after turning ignition off and on again. hopefully has saved a fault code to give garage something to go on when in for a service this week

giraffe · 17-04-2012, 12:53 AM

Quote:

Originally Posted by conleth m3

i have this problem as well. up until recently only happened as others have said, on track and when pushing on. happened abit more when on my ring trip at easter. took car to tom schirmer on kelburg who knows his stuff. he said you can try to bleed the clutch fluid, but didnt really know why it happens. he said it has happened on some of their race cars on one weekend, did nothing in between and was perfect the weekend after.

also, sorry dunc, he said a customer had had 2 replacement gearboxes under warranty and was still happening, and that bmw didnt know why it happened.

sounds like it should be something like a synchro or selector issue, but i dunno

has happened to me recently changing down from 5th to 4th as well, also from 3rd to 4th when not pushing at all on road in auto mode (level 2 - so not remotely aggressive) these times the car went into limp home mode for about 20 secs and also brought on smg yellow cog, which went out after turning ignition off and on again. hopefully has saved a fault code to give garage something to go on when in for a service this week

if its happening on more than 1 lot of gear selection sounds more like a SMG pressure issue rather than internal box fault .

shane@mbtech · 17-04-2012, 12:57 AM

Duncans was different fault.

Possible snapped detent spring?, did you check Gareth.

**shimmy** · 17-04-2012, 12:59 AM

Mine was caught very early thanks to the video evidence. Was when gearbox was very hot

and the day was very hot

nd missed 3 to 4 three times in one (track) day.

I think AndyP got Gareth to look in the gearbox and there were signs of he synchro mesh going so a complete new box and never happened again. That was 40k miles ago.

I think Flow had similar problem and tried swapping everything from his box, actuator, controls etc and never cured it.

giraffe · 17-04-2012, 01:43 AM

Quote:

Originally Posted by lawsy

Duncans was different fault.

Possible snapped detent spring?, did you check Gareth.

Not got box out yet , if i get chance to have a look inside i will all depends on how busy we are , as it warranty dont normally get to involved with stripping as not cost effective and its eayer for BMW to warrant a exchange box than have us strip and rebuild , bit of a shame really as like pulling stuff apart

conleth m3 · 17-04-2012, 11:10 AM

Quote:

Originally Posted by giraffe

if its happening on more than 1 lot of gear selection sounds more like a SMG pressure issue rather than internal box fault .

ok cool, cheers gareth. will get that looked into. my garage have a spare smg pump/actuator they said can try to see if helps. is the unit/fluid sealed for life or needing changed everyso often?

will it degrade over time, like brake fluid? just been bled but is it worth changing fluid of new?

cheers

conleth

_Nathan_ · 17-04-2012, 11:50 AM

I have a complete CSL SMG system going spare if anyone needs some parts

16-04-2012, 11:45 AM	#11
DuncanR CSL Register Uber-poster! Join Date: Sep 2009 Location: Olney, Bucks Posts: 3,735 Casino cash: $9984	Oh dear ... absolutely gutted ... I have to say farewell to my old gearbox the very last original large item left of the car other than the bodyshell ! ...sadly its being replaced under warranty by a brand new one by ELMS .... what a class operation they run , with some really great people ! __________________ " I use Gleaming Kleen.... for that new car look " I wish I had used - Race Data Systems - Motorsport Data Loggers forgive me Nathan !

17-04-2012, 12:59 AM	#17
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	Mine was caught very early thanks to the video evidence. Was when gearbox was very hot and the day was very hot nd missed 3 to 4 three times in one (track) day. I think AndyP got Gareth to look in the gearbox and there were signs of he synchro mesh going so a complete new box and never happened again. That was 40k miles ago. I think Flow had similar problem and tried swapping everything from his box, actuator, controls etc and never cured it. __________________ .

17-04-2012, 11:50 AM	#20
_Nathan_ Driving it like I nicked it Join Date: Sep 2008 Posts: 2,099 Casino cash: $13060	I have a complete CSL SMG system going spare if anyone needs some parts __________________ Nathan

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16-04-2012, 11:18 PM	#14
conleth m3 S4 - Getting the hang of it Join Date: Oct 2009 Posts: 218 Casino cash: $9386	i have this problem as well. up until recently only happened as others have said, on track and when pushing on. happened abit more when on my ring trip at easter. took car to tom schirmer on kelburg who knows his stuff. he said you can try to bleed the clutch fluid, but didnt really know why it happens. he said it has happened on some of their race cars on one weekend, did nothing in between and was perfect the weekend after. also, sorry dunc, he said a customer had had 2 replacement gearboxes under warranty and was still happening, and that bmw didnt know why it happened. sounds like it should be something like a synchro or selector issue, but i dunno has happened to me recently changing down from 5th to 4th as well, also from 3rd to 4th when not pushing at all on road in auto mode (level 2 - so not remotely aggressive) these times the car went into limp home mode for about 20 secs and also brought on smg yellow cog, which went out after turning ignition off and on again. hopefully has saved a fault code to give garage something to go on when in for a service this week

17-04-2012, 12:57 AM	#16
shane@mbtech CSL Register Uber-poster! Join Date: Feb 2009 Location: warrington Posts: 5,419 Casino cash: $19783	Duncans was different fault. Possible snapped detent spring?, did you check Gareth.