6 speed auto trans slip

eds135 · 01-02-2012, 02:09 AM

i have experince just recently my gear box slipping under soft acceloration, 2010 model 135i. Once using sports mode notice a slip and the other in normal mode. has anyone else experienced this or does anyone know what could be causing this car has under 10,000kms on it ?

??

nafoo · 01-02-2012, 05:05 AM

Do you have a tune/mods? Just take it in and have it checked out since you should still be under factory warranty.

az335idesi · 01-02-2012, 12:03 PM

how exactly do you know if it is slipping? I am FBO, and the tranny feels a little weird lately, but ive never had a tranny slip before, so i have no idea what it does or feels like

eds135 · 01-06-2012, 03:51 AM

was thinking of taking it in , mods done just bmw powerkit , went for another drive the next day drove for around 40mins no probs

. the slipping felt like the valve for the traction control just dumped oil back to pan lost full pressure for a second ... thanx for both of the replies to my question ...

Wedge1967 · 01-06-2012, 02:29 PM

While the trans is cold, I have felt my converter not lockup at times. I can manually shift through the gears with kind of a slipping soft feeling. If I back off, it will lockout the converter and then it pulls hard without slipping. Doesn't do it all the time. I have 60k and have been tuned for 20k. I'm over 420rwhp and very happy with how it performs. Hopefully you don't have any major issues, but if you're under warranty I would take your car in and let the dealer know what happened. If it continues at least you have a record it happened before with the dealer and maybe they will swap your trans.

Syndicategt · 01-06-2012, 04:04 PM

Quote:

Originally Posted by az335idesi

how exactly do you know if it is slipping? I am FBO, and the tranny feels a little weird lately, but ive never had a tranny slip before, so i have no idea what it does or feels like

It will feel like your traction control is stepping in and killing your power, however, no CEL or DCS blinking. I've only had it happen once on my RB's.

love2drive · 01-06-2012, 05:14 PM

IIRC, revving between shifts could also be related to transmission "learning". For example, I drive more aggressively in the summer and very cautiously in the winter (ice), so my tranny has learned the former and is shifting strangely now. There are steps to reset the tranny that might help. Of course if you're experiencing real slipping then disregard this.

07bmw335iguy · 01-06-2012, 05:43 PM

What are the steps for resetting a/t transmission?

az335idesi · 01-06-2012, 06:57 PM

Quote:

Originally Posted by Syndicategt

It will feel like your traction control is stepping in and killing your power, however, no CEL or DCS blinking. I've only had it happen once on my RB's.

thank you! so my tranny is not slipping..mine revs up a little then shifts...like lets say i have a pedal down enough for it to shift at 2500rpm, it would rev up to 2800-3000, (like it was neutral dropped or something) then shift up

chrisw335i · 01-06-2012, 07:00 PM

Mine does the same thing on occasion..more so when its cold

335okc · 01-06-2012, 07:57 PM

it's because procede doesn't close the throttle body on shifts, so the rev blimp is common/to be expected.

JayReplay · 01-06-2012, 08:06 PM

Yeah I've noticed this on occasion since the car was new. Never really thought much about it other than it being normal.

01-02-2012, 02:09 AM	#1
eds135 New Member 0 Rep 6 Posts Drives: 135i coupe Join Date: Oct 2011 Location: Kellyville Ridge iTrader: (0)	6 speed auto trans slip i have experince just recently my gear box slipping under soft acceloration, 2010 model 135i. Once using sports mode notice a slip and the other in normal mode. has anyone else experienced this or does anyone know what could be causing this car has under 10,000kms on it ???
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01-02-2012, 05:05 AM	#2
nafoo Major 46 Rep 1,145 Posts Drives: Boosted Bimmer Join Date: Jan 2010 Location: Earth iTrader: (15)	Do you have a tune/mods? Just take it in and have it checked out since you should still be under factory warranty.
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01-02-2012, 12:03 PM	#3
az335idesi Private First Class 20 Rep 144 Posts Drives: e90 335i Join Date: Aug 2011 Location: AZ iTrader: (0)	how exactly do you know if it is slipping? I am FBO, and the tranny feels a little weird lately, but ive never had a tranny slip before, so i have no idea what it does or feels like
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01-06-2012, 03:51 AM	#4
eds135 New Member 0 Rep 6 Posts Drives: 135i coupe Join Date: Oct 2011 Location: Kellyville Ridge iTrader: (0)	reply was thinking of taking it in , mods done just bmw powerkit , went for another drive the next day drove for around 40mins no probs . the slipping felt like the valve for the traction control just dumped oil back to pan lost full pressure for a second ... thanx for both of the replies to my question ...
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01-06-2012, 02:29 PM	#5
Wedge1967 Banned 125 Rep 2,172 Posts Drives: '07 e92 AT Sport Montego Blue Join Date: Sep 2011 Location: Portland, OR iTrader: (3)	While the trans is cold, I have felt my converter not lockup at times. I can manually shift through the gears with kind of a slipping soft feeling. If I back off, it will lockout the converter and then it pulls hard without slipping. Doesn't do it all the time. I have 60k and have been tuned for 20k. I'm over 420rwhp and very happy with how it performs. Hopefully you don't have any major issues, but if you're under warranty I would take your car in and let the dealer know what happened. If it continues at least you have a record it happened before with the dealer and maybe they will swap your trans.
	Appreciate 0 Quote

01-06-2012, 05:14 PM	#7
love2drive keeps cars too long. 8 Rep 74 Posts Drives: 2007 E90 335i Join Date: Jan 2010 Location: Chicago iTrader: (3)	IIRC, revving between shifts could also be related to transmission "learning". For example, I drive more aggressively in the summer and very cautiously in the winter (ice), so my tranny has learned the former and is shifting strangely now. There are steps to reset the tranny that might help. Of course if you're experiencing real slipping then disregard this.
	Appreciate 0 Quote

01-06-2012, 05:43 PM	#8
07bmw335iguy Second Lieutenant 9 Rep 227 Posts Drives: 2007 BMW 335i Sedan Join Date: Sep 2011 Location: South Carolina iTrader: (4)	What are the steps for resetting a/t transmission?
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01-06-2012, 07:00 PM	#10
chrisw335i First Lieutenant 13 Rep 377 Posts Drives: 2007 BMW 335i Coupe Join Date: Jan 2011 Location: Columbus, Ga. iTrader: (3)	Mine does the same thing on occasion..more so when its cold __________________ 2007 335i Coupe 6AT - Sports Package - Premium Package - Procede V5 Rev 2.5 - Vishnu PWM - Vishnu DCI - Vanguard Exhaust - AR Downpipes - Helix FMIC - 19" Avant Garde M6 Reps - Michelin Pilot Super Sports - Bilstein PSS10 - M3 Suspension Bits - M3 Sway - M3 Strut Brace - GP Thunder -Forge DV -15% Tint - Aero Lip
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01-06-2012, 07:57 PM	#11
335okc Captain 42 Rep 659 Posts Drives: e90 335 Join Date: Feb 2011 Location: okc iTrader: (0)	it's because procede doesn't close the throttle body on shifts, so the rev blimp is common/to be expected.
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01-06-2012, 08:06 PM	#12
JayReplay Lieutenant Colonel 85 Rep 1,523 Posts Drives: E46 M3 6MT Sunroof Delete Join Date: Mar 2008 Location: River Forest, IL iTrader: (18)	Yeah I've noticed this on occasion since the car was new. Never really thought much about it other than it being normal. __________________ 2002 Laguna Seca Blue E46 M3 6MT 2017 White C63 AMG Coupe 2002 Oxford Green E46 M3 6MT - Sold
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