JB4 Auto Transmission slip

SuckMy_Nick · 11-16-2014, 10:05 PM

Had my JB4 for a few weeks now and I experience a transmission slip (or what I believe to be a transmission slip).

map 2- M1 (1st), WOT pull to 6.5RPM, pull back shifter to up shift and my RPMs shoot up as if I were out of gear with my foot all the way down. Doesn't happen all the time, maybe 2 out of 5, 1st to 2nd shifts.. Every other gear is normal.

Map 1- no problem.

Could it have something to do with the Mechatronics sleeve or seal adapter leak?

Note:
-Car has 112k on it (remained bone stock until about 110-111,000)
-Never had a transmission problem
-Only mods are DCI and JB4
-doesn't slip when jb4 is off or in map1

SM335i · 11-17-2014, 12:05 AM

Press and hold DSC button until triangle and !

SuckMy_Nick · 11-17-2014, 10:12 PM

Quote:

Originally Posted by SM335i

Press and hold DSC button until triangle and !

I have a DTC button and it's always turned off

Jeff@TopGearSolutions · 11-18-2014, 09:54 AM

If you are still on the original transmission fluid then that is your answer.

Change your fluid, it should have been replaced at least once already.

After the transmission fluid is changed you can also look into the alpina transmission flash.

WedgePerformance · 11-18-2014, 03:40 PM

If you're not using a back-end flash with increased values in the Torque Divisor, your Torque Output is too low for your transmissions. Especially in the cold weather. Find someone with a BT cable and get Terry's fuel flash loaded before you cause too much damage.

SuckMy_Nick · 11-18-2014, 03:42 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

If you are still on the original transmission fluid then that is your answer.

Change your fluid, it should have been replaced at least once already.

After the transmission fluid is changed you can also look into the alpina transmission flash.

Will be replacing it this weekend

Karimmate · 05-03-2018, 06:29 PM

Hey I’m having the same issue now, how’d you end up going with a fix ?

natedog7700 · 05-06-2018, 07:59 PM

Quote:

Originally Posted by Jeff@TopGearSolutions

If you are still on the original transmission fluid then that is your answer.

Change your fluid, it should have been replaced at least once already.

After the transmission fluid is changed you can also look into the alpina transmission flash.

XHP flash it. Who in the world uses the Alpina flash anymore lol

CanadianTSi · 05-06-2018, 08:21 PM

Quote:

Originally Posted by natedog7700

XHP flash it. Who in the world uses the Alpina flash anymore lol

Look at the date of the post...

natedog7700 · 05-06-2018, 09:13 PM

Quote:

Originally Posted by CanadianTSi

Look at the date of the post...

I'd prefer not to so my ego doesn't go down the sh1tter

11-16-2014, 10:05 PM	#1
SuckMy_Nick Red Liner 10 Rep 129 Posts Drives: E92 335i XDrive Join Date: Dec 2012 Location: Boston iTrader: (0)	JB4 Auto Transmission slip Had my JB4 for a few weeks now and I experience a transmission slip (or what I believe to be a transmission slip). map 2- M1 (1st), WOT pull to 6.5RPM, pull back shifter to up shift and my RPMs shoot up as if I were out of gear with my foot all the way down. Doesn't happen all the time, maybe 2 out of 5, 1st to 2nd shifts.. Every other gear is normal. Map 1- no problem. Could it have something to do with the Mechatronics sleeve or seal adapter leak? Note: -Car has 112k on it (remained bone stock until about 110-111,000) -Never had a transmission problem -Only mods are DCI and JB4 -doesn't slip when jb4 is off or in map1 __________________ 07' E92 328xi (First BMW) 09' E92 335xi (Current Car)
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11-17-2014, 12:05 AM	#2
SM335i Banned 104 Rep 1,059 Posts Drives: Car Join Date: Apr 2013 Location: Location iTrader: (0)	Press and hold DSC button until triangle and !
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11-18-2014, 09:54 AM	#4
Jeff@TopGearSolutions 3441 Rep 79,212 Posts Drives: C6 Z06, 09 335i, 10 335xi Join Date: Dec 2008 Location: www.TopGearSolutions.com iTrader: (37)	If you are still on the original transmission fluid then that is your answer. Change your fluid, it should have been replaced at least once already. After the transmission fluid is changed you can also look into the alpina transmission flash.
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11-18-2014, 03:40 PM	#5
WedgePerformance BimmerPost Supporting Vendor 1334 Rep 1,701 Posts Drives: Slot Machines.. Keep Taking $ Join Date: Oct 2013 Location: Portland, OR iTrader: (0) Garage List 2007 BMW 335i Sport [9.67]	If you're not using a back-end flash with increased values in the Torque Divisor, your Torque Output is too low for your transmissions. Especially in the cold weather. Find someone with a BT cable and get Terry's fuel flash loaded before you cause too much damage.
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05-03-2018, 06:29 PM	#7
Karimmate Registered 0 Rep 1 Posts Drives: Bmw 335 2007 e93 Join Date: May 2018 Location: Australia Sydney 2170 iTrader: (0)	Hey I’m having the same issue now, how’d you end up going with a fix ?
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