BM3 535 Transmission Flash

Casebrius · 10-21-2019, 11:04 AM

Has anyone had problems with the BM3 transmission flash? I'm running E30 map and I can definitely feel it cut back when it hits 3rd gear. I REALLY don't want to tune the tranny unless its proven.

Unspec · 10-21-2019, 11:21 AM

Been running it fine since it came out.

mike@x-ph.com · 10-21-2019, 11:31 AM

Contact PTF

Surly73 · 10-21-2019, 05:11 PM

Quote:

Originally Posted by Casebrius

Has anyone had problems with the BM3 transmission flash? I'm running E30 map and I can definitely feel it cut back when it hits 3rd gear. I REALLY don't want to tune the tranny unless its proven.

3rd and 6th have torque limits in the stock transmission code for the protection of the transmission. What you feel is (almost certainly) by design.

It can be selectively disabled in XHP. Don't know anything about BM3 for that specific question.

There are engine tunes out there, and BM3 might be one of them, that "lie" to the TCU so that it doesn't limit torque. Just like with "piggy back tunes", however, once you start providing false data between ECUs in the vehicle things sometimes don't work as expected.

Checking in with BM3 to determine if that "rescale" values reported to the transmission may be of value.

AZ-MCRacer · 10-21-2019, 05:37 PM

I have been running it for a while now. The downshifts in Sport, Sport+ are a bit aggressive feeling, but otherwise I like it a lot. It definitely speeds up shifting during hard pulls.

Casebrius · 11-24-2019, 11:44 AM

Can it be set up to only work (increase tq limits) in Sport+ ?

On a side note, there is no way to completely turn off traction control and DSC is there?

10-21-2019, 11:04 AM	#1
Casebrius Private 6 Rep 75 Posts Drives: 2016 535 M-Sport; 95,97 E36 M3 Join Date: Mar 2019 Location: Loosiana iTrader: (0)	BM3 535 Transmission Flash Has anyone had problems with the BM3 transmission flash? I'm running E30 map and I can definitely feel it cut back when it hits 3rd gear. I REALLY don't want to tune the tranny unless its proven.
	Appreciate 0 Tweet Quote

10-21-2019, 11:21 AM	#2
Unspec Colonel 1300 Rep 2,590 Posts Drives: 2015 BMW 535xi Join Date: Apr 2019 Location: DMV iTrader: (1)	Been running it fine since it came out.
	Appreciate 0 Quote

10-21-2019, 11:31 AM	#3
mike@x-ph.com Joint Chiefs of Staff 24183 Rep 190,777 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Contact PTF __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
	Appreciate 0 Quote

10-21-2019, 05:37 PM	#5
AZ-MCRacer First Lieutenant 306 Rep 332 Posts Drives: 2022 G82 M4, 2013 F10 N55 Join Date: Oct 2016 Location: Tempe, AZ iTrader: (0)	I have been running it for a while now. The downshifts in Sport, Sport+ are a bit aggressive feeling, but otherwise I like it a lot. It definitely speeds up shifting during hard pulls. __________________ 2022 G82 M4 - Isle of Man Green w/Kyalami Carbon Bucket Seats - MST Intakes, SSR Downpipes, JB4, AWE Exhaust. 2013 F10 N55 (535i), Pure Stage 2, Fuel-It PI Platinum, Fuel-It Stage 2 LPFP, BootMod3, Custom Turbo Inlet, Custom Cary Jordan Tune, More.. SOLD! 1999 e36 M3 - Estoril Blue - Track Car - S54 Swapped
	Appreciate 1 OnlyGerman362.00 Quote

11-24-2019, 11:44 AM	#6
Casebrius Private 6 Rep 75 Posts Drives: 2016 535 M-Sport; 95,97 E36 M3 Join Date: Mar 2019 Location: Loosiana iTrader: (0)	Can it be set up to only work (increase tq limits) in Sport+ ? On a side note, there is no way to completely turn off traction control and DSC is there? Last edited by Casebrius; 11-24-2019 at 11:56 AM..
	Appreciate 0 Quote