final drive and ecu modification

maicol76 · 11-23-2017, 11:29 PM

I changed stock DCT F/D 3.15 -> to 3.45.
I read that 3.45 doesn't need ecu modification unlike 3.62.
But IMO, changing hardware always require proper software.

Anyway, does someone know ecu tuner for this?

roastbeef · 11-23-2017, 11:37 PM

Driftflo would know. He seems to be very knowledgeable on the subject.

Big LSD Shootout... OS Giken, Drexler, Titan, GKN, ZF... http://www.m3post.com/forums/showthread.php?t=788992

maicol76 · 11-24-2017, 12:21 AM

Quote:

Originally Posted by roastbeef

Driftflo would know. He seems to be very knowledgeable on the subject.

Big LSD Shootout... OS Giken, Drexler, Titan, GKN, ZF... http://www.m3post.com/forums/showthread.php?t=788992

I bought F/D from him, and will send email to him

The thing that I know is the tuner about this in US, too.

Redd · 11-24-2017, 01:23 AM

BPM says no specific engine tune is required. But a DCT tune is recommended if you're facing shifting issues.

Redd · 11-24-2017, 01:24 AM

Btw what is your review of the 3.45?

maicol76 · 11-24-2017, 04:21 AM

I'm installing it right now, so I don't drive it yet.
After driving, I'll tell you the review.

DCT tune? plz give me the information in detail.

Redd · 11-24-2017, 08:02 AM

I mean the GTS DCT tune. BPM and Alpine has them.

///Mobbin · 11-24-2017, 09:44 AM

Good information in this thread as well,
LINK.

So I have the 3.45 diff gear set and it worked fine with the OE DCT tune. I then tried one of the revised aftermarket DCT tunes (Alpine) and noticed the rev matching was a bit off. This may have had something to do with my engine tune though, Dinan Stage II, not sure, but I went back to the OE DCT tune for awhile and then recently flashed the OE GTS DCT tune and that works flawlessly.

I ran in S6 this last weekend at COTA, lightning fast shifts and no issues.

11-23-2017, 11:29 PM	#1
maicol76 First Lieutenant 194 Rep 305 Posts Drives: E92 M3 Join Date: Oct 2011 Location: CA, Santa fe iTrader: (0)	final drive and ecu modification I changed stock DCT F/D 3.15 -> to 3.45. I read that 3.45 doesn't need ecu modification unlike 3.62. But IMO, changing hardware always require proper software. Anyway, does someone know ecu tuner for this? __________________ 2011 LCI W/DCT / K&N drop in filter / CSF radiator / do88 oil cooler / do88 DCT cooler / Akra Evo / Moton CS 2 way coilover / Wiechers strut bar(F) / ARC strut bar(R) / Alcon Superkit BBK / Tarox rotor / Geoff steel EHPS / Sard carbon-Kevlar GT wing / GT4 carnard / Aim Evo4+G-dash+GT Steering+S/C GP HD / Bride Zeta3 / etc.
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11-23-2017, 11:37 PM	#2
roastbeef Lieutenant General 11586 Rep 12,728 Posts Drives: E92 M3 Join Date: Nov 2010 Location: Orange County, CA iTrader: (4)	Driftflo would know. He seems to be very knowledgeable on the subject. Big LSD Shootout... OS Giken, Drexler, Titan, GKN, ZF... http://www.m3post.com/forums/showthread.php?t=788992 __________________ Instagram; @roastbeefmike
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11-24-2017, 01:23 AM	#4
Redd Brigadier General 3901 Rep 4,168 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	BPM says no specific engine tune is required. But a DCT tune is recommended if you're facing shifting issues.
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11-24-2017, 01:24 AM	#5
Redd Brigadier General 3901 Rep 4,168 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Btw what is your review of the 3.45?
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11-24-2017, 04:21 AM	#6
maicol76 First Lieutenant 194 Rep 305 Posts Drives: E92 M3 Join Date: Oct 2011 Location: CA, Santa fe iTrader: (0)	I'm installing it right now, so I don't drive it yet. After driving, I'll tell you the review. DCT tune? plz give me the information in detail. __________________ 2011 LCI W/DCT / K&N drop in filter / CSF radiator / do88 oil cooler / do88 DCT cooler / Akra Evo / Moton CS 2 way coilover / Wiechers strut bar(F) / ARC strut bar(R) / Alcon Superkit BBK / Tarox rotor / Geoff steel EHPS / Sard carbon-Kevlar GT wing / GT4 carnard / Aim Evo4+G-dash+GT Steering+S/C GP HD / Bride Zeta3 / etc.
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11-24-2017, 08:02 AM	#7
Redd Brigadier General 3901 Rep 4,168 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	I mean the GTS DCT tune. BPM and Alpine has them.
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11-24-2017, 09:44 AM	#8
///Mobbin Colonel 1478 Rep 2,672 Posts Drives: m3 Join Date: Jul 2011 Location: Houston iTrader: (3)	Good information in this thread as well, LINK. So I have the 3.45 diff gear set and it worked fine with the OE DCT tune. I then tried one of the revised aftermarket DCT tunes (Alpine) and noticed the rev matching was a bit off. This may have had something to do with my engine tune though, Dinan Stage II, not sure, but I went back to the OE DCT tune for awhile and then recently flashed the OE GTS DCT tune and that works flawlessly. I ran in S6 this last weekend at COTA, lightning fast shifts and no issues. __________________ 2021 Alfa Romeo Stelvio Quadrifoglio \| 2.9L \| Trofeo White Tri-Coat \| 8-spd
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