6AT Malfunction

320IN54 · 11-26-2019, 11:22 PM

My transmission just had a malfunction warning pop with it being stuck in 5th gear. The trans temps seem ok if moving but it did get a little too hot going up hill and from heavy stop and go traffic as the car was stuck in 5th. Warning goes away after restarting car but it does come back after the tranny warms up.

iqraceworks · 11-26-2019, 11:25 PM

How many miles on the transmission? When was the last time you changed the fluid and filter (if ever)? Have the seals between the valve body and transmission case ever been changed?

You need to give some more info.......

type-dRew · 11-26-2019, 11:34 PM

What's 'a little hot'?

320IN54 · 11-27-2019, 12:02 AM

Tranny is at 110k and the fluid was changed around 75k. The mechatronic seal was also replaced at that time as well. The temps reached almost 220 degrees Fahrenheit at its worst but lowered to 205 as soon as i started moving.

type-dRew · 11-27-2019, 07:43 AM

If you aren't beating on the car, you shouldnt be seeing near 200 degrees at all. I've only seen 210 degrees once or twice and that was with repeated drag launches one right after another through multiple gear every time testing something.

I'd bet you have a cooler issue or the trans is coming apart internally and heating the fluid up past normal.

Silkyg · 11-29-2019, 12:33 PM

Check the fluid level

11-26-2019, 11:22 PM	#1
320IN54 First Lieutenant 130 Rep 336 Posts Drives: 2007 BMW 335i, 2021 BMW M2C Join Date: Jan 2017 Location: Irvine iTrader: (0)	6AT Malfunction My transmission just had a malfunction warning pop with it being stuck in 5th gear. The trans temps seem ok if moving but it did get a little too hot going up hill and from heavy stop and go traffic as the car was stuck in 5th. Warning goes away after restarting car but it does come back after the tranny warms up.
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11-26-2019, 11:25 PM	#2
iqraceworks Brigadier General 2088 Rep 3,809 Posts Drives: 2007 335i Join Date: Aug 2019 Location: Missouri iTrader: (0)	How many miles on the transmission? When was the last time you changed the fluid and filter (if ever)? Have the seals between the valve body and transmission case ever been changed? You need to give some more info.......
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11-26-2019, 11:34 PM	#3
type-dRew Major 642 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	What's 'a little hot'? __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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11-27-2019, 12:02 AM	#4
320IN54 First Lieutenant 130 Rep 336 Posts Drives: 2007 BMW 335i, 2021 BMW M2C Join Date: Jan 2017 Location: Irvine iTrader: (0)	Tranny is at 110k and the fluid was changed around 75k. The mechatronic seal was also replaced at that time as well. The temps reached almost 220 degrees Fahrenheit at its worst but lowered to 205 as soon as i started moving.
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11-27-2019, 07:43 AM	#5
type-dRew Major 642 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	If you aren't beating on the car, you shouldnt be seeing near 200 degrees at all. I've only seen 210 degrees once or twice and that was with repeated drag launches one right after another through multiple gear every time testing something. I'd bet you have a cooler issue or the trans is coming apart internally and heating the fluid up past normal. __________________ 2009 335i xDrive AT / 177k+ miles PSP 750ic / Fuel-It! Stage 1 / BMS CP / Sutphin Tuning / RFP E50 11.61 @ 117.5 New setup; Covid 19Ts on RFP 93 + ARM inlets, dp, VTT cp and PSP outlets
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11-29-2019, 12:33 PM	#6
Silkyg Enlisted Member 11 Rep 38 Posts Drives: E92 Join Date: Dec 2018 Location: Atx iTrader: (0)	Check the fluid level
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