Rpm's stoping for a second? Than continues....? - BMW 3-Series (E90 E92) Forum

e87fan89 · 12-17-2012, 07:37 AM

When driving my 135i, I'm running jb4 stage 2 iso. I notice my car is very picky on what gear it wants to start in when going WOT. for instance I'f I'm going 60 and want to punch it my car rather me go to around 4k rpms and than it goes. My question is let's say I'm doing around 40-50 and downshift to 5th from 7th my rpms will stop for a second around 5k than go but no jerking or any hesitation. If I repeat this a few times my tranny overheats. Any idea why this happens? Otherwise my car runs fine and I can floor it all day in drive and manual but when I try to manually Downshift to the right gear so I don't need to use kick down I'm doing something wrong. Anyone with dct with any insight to why this happens?

e87fan89 · 12-17-2012, 07:40 AM

To note that 5th gear example my car starts at 2-3k when it does that. But if I get it up to 4k or a little higher never any problem

reirei725 · 12-17-2012, 09:01 PM

I'm having a similar problem after my ISO install. While cruising my rpms will get stuck around 2500rpm for a few seconds then drop. Guess we all just have to email terry about it.

12-17-2012, 07:37 AM	#1
e87fan89 Private First Class Drives: 2013 135i M sport Join Date: Dec 2010 Location: N/A Posts: 140 iTrader: (0)	Rpm's stoping for a second? Than continues....? When driving my 135i, I'm running jb4 stage 2 iso. I notice my car is very picky on what gear it wants to start in when going WOT. for instance I'f I'm going 60 and want to punch it my car rather me go to around 4k rpms and than it goes. My question is let's say I'm doing around 40-50 and downshift to 5th from 7th my rpms will stop for a second around 5k than go but no jerking or any hesitation. If I repeat this a few times my tranny overheats. Any idea why this happens? Otherwise my car runs fine and I can floor it all day in drive and manual but when I try to manually Downshift to the right gear so I don't need to use kick down I'm doing something wrong. Anyone with dct with any insight to why this happens?
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12-17-2012, 07:40 AM	#2
e87fan89 Private First Class Drives: 2013 135i M sport Join Date: Dec 2010 Location: N/A Posts: 140 iTrader: (0)	To note that 5th gear example my car starts at 2-3k when it does that. But if I get it up to 4k or a little higher never any problem

12-17-2012, 09:01 PM	#3
reirei725 New Member Drives: 335i M-Sport Join Date: Dec 2011 Location: Miami Posts: 21 iTrader: (0)	I'm having a similar problem after my ISO install. While cruising my rpms will get stuck around 2500rpm for a few seconds then drop. Guess we all just have to email terry about it.