135i Auto tranny shifting on its own

hawkm3 · 09-28-2014, 05:25 PM

Hey guys so ive had the car for about 3 months now, bought it used with 9k miles and I love it but I keep having this issue with the tranny shifting on its own sometimes when I go WOT. Yes I throw it in sport mode or so thats what i think its called (when you go left on the shifter) and yes I take off traction control. For example if I do a WOT pull from second gear, using the paddles, to shift from 2nd to 3rd, 3rd to 4th or 4th to 5th it will shift without me even touching the paddles at all, before I even get to redline so I dont know if its sometihing to do with the ECU, I have a JB4 BTW, and spare me the I should of gotten a manuel tranny, I wanted auto, thanks guys!

thezone135i · 09-28-2014, 05:43 PM

Subscribed- would also like to know if theres a solution to this.

hawkm3 · 09-28-2014, 05:54 PM

well at least i know im not the only one having this issue lol

yaga11 · 09-28-2014, 06:27 PM

Do you see the gear indicator in your gauge cluster?
Does it say S1 or M1? (1 being the current gear you are in)

hawkm3 · 09-28-2014, 07:02 PM

Isn't s1 when you put it in steptronic mode by going left on the shifter and m1 when your just in D (drive)?

MIAblu1 · 09-28-2014, 08:20 PM

I have the auto tranny and mine is '08 so I don't have the paddles and DCT tranny BUT I got the Alpina B3 transmission flash and when I go left (manual shift mode) it indicates "M1,2,3...ect" that's what they're referring to. And in normal drive D1.2..3.. And S1...2...3 in sport. Anyways, the transmission with the flash does down shift on its own if I don't from 3rd to 2nd but it does allow me to redline and I've never really messed with it to allow it to go so far into redline to know if it's self shift but when I get the chance I'll update.

hawkm3 · 09-28-2014, 09:23 PM

Quote:

Originally Posted by MIAblu1

I have the auto tranny and mine is '08 so I don't have the paddles and DCT tranny BUT I got the Alpina B3 transmission flash and when I go left (manual shift mode) it indicates "M1,2,3...ect" that's what they're referring to. And in normal drive D1.2..3.. And S1...2...3 in sport. Anyways, the transmission with the flash does down shift on its own if I don't from 3rd to 2nd but it does allow me to redline and I've never really messed with it to allow it to go so far into redline to know if it's self shift but when I get the chance I'll update.

Hmm i believe mine doesnt show s1 only d1 and m1, ill have to check that out. However I wouldnt have an issue if it shifted on its own if i got close to redline the issue is that sometimes it shifts before i even come close to redline, so i end up losing

its done it quite a few times

Stock4Evr · 09-29-2014, 07:01 AM

Quote:

Originally Posted by Ralph1M

Hey guys so ive had the car for about 3 months now, bought it used with 9k miles and I love it but I keep having this issue with the tranny shifting on its own sometimes when I go WOT. Yes I throw it in sport mode or so thats what i think its called (when you go left on the shifter) and yes I take off traction control. For example if I do a WOT pull from second gear, using the paddles, to shift from 2nd to 3rd, 3rd to 4th or 4th to 5th it will shift without me even touching the paddles at all, before I even get to redline so I dont know if its sometihing to do with the ECU, I have a JB4 BTW, and spare me the I should of gotten a manuel tranny, I wanted auto, thanks guys!

I maybe incorrect but when you move the shifter to the left you are in one of the sport mode selections the other being the sport button. I would say with that selection the trans will shift by itself and you can also use the paddles but the trans is in an auto mode. To go all the way to manual you move the elector to the left and then up.

DietTab · 09-29-2014, 07:13 AM

There is no issue. The car will autoshift in manual mode if you rev it out.

Also, the tach is slow.

hawkm3 · 09-29-2014, 08:05 AM

Quote:

Originally Posted by SocHermit(2)

I maybe incorrect but when you move the shifter to the left you are in one of the sport mode selections the other being the sport button. I would say with that selection the trans will shift by itself and you can also use the paddles but the trans is in an auto mode. To go all the way to manual you move the elector to the left and then up.

There's a sport button? I'm still learning this car lol so go left then up on the shifter? Won't that just shift up?

hawkm3 · 09-29-2014, 08:06 AM

Quote:

Originally Posted by DietTab

There is no issue. The car will autoshift in manual mode if you rev it out.

Also, the tach is slow.

The thing is I'm no where near redline, or are you saying the tach isn't keeping up with the revs?

John_01 · 09-29-2014, 08:17 AM

I think the car's electronics can decide depending on conditions at what RPM to shift at, no matter whether its near the redline or not. I wonder if using the stock maps selected by the JB4 would avoid this issue.

Downeaster1 · 09-29-2014, 01:33 PM

Quote:

Originally Posted by DietTab

There is no issue. The car will autoshift in manual mode if you rev it out.

Also, the tach is slow.

This.

Stock4Evr · 09-29-2014, 01:53 PM

Quote:

Originally Posted by Ralph1M

There's a sport button? I'm still learning this car lol so go left then up on the shifter? Won't that just shift up?

Sport button is just below the shifter. Moving the shift lever to the left put it is one type of sport mode and then up to go Manual. While in Manual moving the lever up downshifts and moving the lever back upshifts.

Do a search and you should be able to find an instruction manual for your vehicle.

hawkm3 · 09-29-2014, 05:35 PM

Quote:

Originally Posted by John_01

I think the car's electronics can decide depending on conditions at what RPM to shift at, no matter whether its near the redline or not. I wonder if using the stock maps selected by the JB4 would avoid this issue.

This makes a lot of sense maybe it's a safety feature the protect the transmission from going boom lol and I do use the jb4 maps still does it, some say the aplina flash might help but if it's a safety feature I have no complaints

hawkm3 · 09-29-2014, 05:36 PM

Quote:

Originally Posted by SocHermit(2)

Sport button is just below the shifter. Moving the shift lever to the left put it is one type of sport mode and then up to go Manual. While in Manual moving the lever up downshifts and moving the lever back upshifts.

Do a search and you should be able to find an instruction manual for your vehicle.

Hmm I have to look into this, I've only had the car for a while so still learning all the gadgets, I always thought sport mode was just going left on the shifter, but thanks ill do some searching!

E46NAQ7 · 09-29-2014, 06:57 PM

I have had the same thing on 1st to 2nd after installing JB4 on WOT. I think it's just to to protect the tranny from the obscure amount of torque.

hawkm3 · 09-29-2014, 09:22 PM

Quote:

Originally Posted by naqvibmw

I have had the same thing on 1st to 2nd after installing JB4 on WOT. I think it's just to to protect the tranny from the obscure amount of torque.

Makes sense man

09-28-2014, 05:25 PM	#1
hawkm3 Lieutenant 57 Rep 477 Posts Drives: 2009 135i Join Date: Jun 2014 Location: Central Cali iTrader: (4)	135i Auto tranny shifting on its own Hey guys so ive had the car for about 3 months now, bought it used with 9k miles and I love it but I keep having this issue with the tranny shifting on its own sometimes when I go WOT. Yes I throw it in sport mode or so thats what i think its called (when you go left on the shifter) and yes I take off traction control. For example if I do a WOT pull from second gear, using the paddles, to shift from 2nd to 3rd, 3rd to 4th or 4th to 5th it will shift without me even touching the paddles at all, before I even get to redline so I dont know if its sometihing to do with the ECU, I have a JB4 BTW, and spare me the I should of gotten a manuel tranny, I wanted auto, thanks guys! __________________ FBO 09 135i Space Grey Metallic ///M Sport/Premium Package JB4 40% E85 / BMS Intakes / VRSF FMIC / Berk Resonated Midpipes / Custom Muffler Delete / N54 tuning downpipes / VMR v710 Wheels
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09-28-2014, 05:43 PM	#2
thezone135i Lieutenant 54 Rep 472 Posts Drives: Volvo S60 R-Design Polestar Join Date: Mar 2014 Location: Melbourne, Australia iTrader: (0) Garage List 2008 BMW 135i [0.00] 2012 BMW 535i [0.00]	Subscribed- would also like to know if theres a solution to this.
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09-28-2014, 05:54 PM	#3
hawkm3 Lieutenant 57 Rep 477 Posts Drives: 2009 135i Join Date: Jun 2014 Location: Central Cali iTrader: (4)	well at least i know im not the only one having this issue lol __________________ FBO 09 135i Space Grey Metallic ///M Sport/Premium Package JB4 40% E85 / BMS Intakes / VRSF FMIC / Berk Resonated Midpipes / Custom Muffler Delete / N54 tuning downpipes / VMR v710 Wheels
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09-28-2014, 06:27 PM	#4
yaga11 New Member 1 Rep 13 Posts Drives: 2011 135i Join Date: Aug 2014 Location: United States iTrader: (0)	Do you see the gear indicator in your gauge cluster? Does it say S1 or M1? (1 being the current gear you are in)
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09-28-2014, 07:02 PM	#5
hawkm3 Lieutenant 57 Rep 477 Posts Drives: 2009 135i Join Date: Jun 2014 Location: Central Cali iTrader: (4)	Isn't s1 when you put it in steptronic mode by going left on the shifter and m1 when your just in D (drive)?
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09-28-2014, 08:20 PM	#6
MIAblu1 Second Lieutenant 22 Rep 201 Posts Drives: 08 Monaco Blue 135i Join Date: Jul 2012 Location: Florida iTrader: (0)	I have the auto tranny and mine is '08 so I don't have the paddles and DCT tranny BUT I got the Alpina B3 transmission flash and when I go left (manual shift mode) it indicates "M1,2,3...ect" that's what they're referring to. And in normal drive D1.2..3.. And S1...2...3 in sport. Anyways, the transmission with the flash does down shift on its own if I don't from 3rd to 2nd but it does allow me to redline and I've never really messed with it to allow it to go so far into redline to know if it's self shift but when I get the chance I'll update.
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09-29-2014, 07:13 AM	#9
DietTab First Lieutenant 12 Rep 324 Posts Drives: 08 135i Join Date: May 2014 Location: Manhattan, KS iTrader: (2)	There is no issue. The car will autoshift in manual mode if you rev it out. Also, the tach is slow. __________________ LSXOCET - 404rwhp @ 1600 lbs curb weight... bonkers fast Last edited by DietTab; 09-29-2014 at 07:27 AM..
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09-29-2014, 08:17 AM	#12
John_01 Colonel 232 Rep 2,643 Posts Drives: E90 325i, E82 135i Join Date: Mar 2009 Location: Sydney, Australia iTrader: (0)	I think the car's electronics can decide depending on conditions at what RPM to shift at, no matter whether its near the redline or not. I wonder if using the stock maps selected by the JB4 would avoid this issue.
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09-29-2014, 06:57 PM	#17
E46NAQ7 Second Lieutenant 16 Rep 294 Posts Drives: None Join Date: Apr 2013 Location: DFW iTrader: (1)	I have had the same thing on 1st to 2nd after installing JB4 on WOT. I think it's just to to protect the tranny from the obscure amount of torque. __________________ Gloss Black Kidneys/Gloss Black Spoiler/AG M359/JB4 Stage II/VRSF DP/BMS Intake/BMW PPK
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