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Old 10th October 2012, 09:12 AM
david@a8parts david@a8parts is offline
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Default Gearbox Brain in BMW v AUDI

I was out driving at the weekend in my Mum's BMW 330Ci Auto. Now, I have noticed on many other occasions when driving this car that the gearbox ECU is far more intelligent than any Audi Auto I have driven but the damn thing seems to get more intelligent each time I drive it !

The Audi boxes are fairly clever - if you put it in sport mode it will hold the gears briefly when you release the accelerator (so long as you do it quickly enough) and it will learn your style and if you are in the mood to press on it will work with you. However, the BMW box is on another level. Accelerate hard and release and it will not change up until you accelerate again. Accelerate into a corner and it will not change gear while you are cornering. And something I have never experienced in an audi, and it is so obvious in the BMW, is the engine braking. Coming down Sutton Bank (quite steep) on Sunday in no rush at all I started the downhill and gently pressed the brake pedal. The box shifted down into 3rd to assist me to slow down (cool). Then as I continued to lightly press the brake the speed of the car continued to increase so the box dropped down into 2nd (excellent!) and I travelled down the hill hardly needing to use the brakes at all just as you would in a manual car. How clever.
Now, annoyingly, the BMW box is ZF and the gearbox controller is Bosch so identical set up to Audi - if the W12 controller had this level of intelligence it would make a real difference; I wonder if I can send it on a training course to BMW....
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  #2  
Old 10th October 2012, 09:21 AM
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OMG... Has Amar hacked your account....
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  #3  
Old 10th October 2012, 09:24 AM
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Oh god David, youre gonna start off Amar now lol.
The A7 has quite a smart S-tronic box that uses online services to tell exactly where you are and anticipates corners and bends ahead and holds a gear instead of changing up where it normally would but its got a fair way to go to be as clever as that one lol
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Old 10th October 2012, 09:37 AM
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My father was a BMW driver, but he left home one day without any indication at all
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Old 10th October 2012, 09:49 AM
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Quote:
Originally Posted by david@a8parts View Post
And something I have never experienced in an audi, and it is so obvious in the BMW, is the engine braking.
I'm quite sure my antique S8 does that, you do have to be applying the brakes going downhill but not slowing down. Pretty sure it's documented in the drivers manual too.

And I noticed on the D3 I had a while back that it automatically applies the brakes too if cruise is on and you accelerate downhill due to gravity, though I suspect that's quite standard nowadays.
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Old 10th October 2012, 10:39 AM
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Old 12th October 2012, 09:29 AM
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Quote:
Originally Posted by HPsauce View Post
I'm quite sure my antique S8 does that, you do have to be applying the brakes going downhill but not slowing down. Pretty sure it's documented in the drivers manual too.

And I noticed on the D3 I had a while back that it automatically applies the brakes too if cruise is on and you accelerate downhill due to gravity, though I suspect that's quite standard nowadays.
It was always my understanding (and experience - as short as it is) that the D2 box changes down when going downhill when you apply the brakes. The manual does indeed confirm that. page 69 - Dynamic shift programme (DSP). It states "on downhill gradients, the gearbox shifts down into a lower gear when the driver presses the brake pedal. This makes use of the braking effect of the engine withour having to change down manually."
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Old 12th October 2012, 09:37 AM
HPsauce HPsauce is offline
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Though having recode my TCU I don't know if that still applies as some of the documentation I've read suggests DSP is now off with what I've done. I'll try it sometime...
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1998 (very early) Ford Focus 1.8 Zetec; ABS/TCS, Heated screen/mirrors, Aircon, Auto-dim mirror, Leather, Trip computer, Cruise control, OEM Ford SatNav with CD changer.
And before that a lot of Rover 800s, a few oddities, a lovely Triumph Dolomite 1850HL with Overdrive and way back in my schooldays an Austin Seven aka Mini 850!
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Old 12th October 2012, 11:01 AM
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Try your S8 TCU in your W12. Got to be worth it for testing of course.
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  #10  
Old 15th October 2012, 02:21 PM
daviesbike daviesbike is offline
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Quote:
Originally Posted by Singh View Post
Here I am.

They don't call them ''The Ultimate Driving Machine'' for nothin'.
go back under your rock Amar haha

and david you should know better than to post that hear tut tut indeed haha

no on a more interesting note i think the TCU Re map really dose make a massive difference if you have a re map
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