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18.1, TCU replacement

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Old 09-14-2005, 11:45 AM
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Well I went in for a couple things recently, SOS broken, wanted 18.1 to improve DS performance, etc. They couldn't fix SOS without replacing the TCU, so that took another day. I must say that DS is exactly ONE MILLION times better than it was previously. It still keep the gear ratio low when accelerating quickly, but unlike before it now upshifts quickly when I let off the pedal. No more embarrassing 4500 RPM stretches while gliding to the grocery store at 35 mph. I haven't yet tested if I actually get 6th gear now on the highway in DS.

So I've now joined the TCU replacement club, at only like 4000 miles. This is not cool. I'm worried about what happens when I go off warranty, they told me that it's around $2000 to swap the TCU off warranty. It HAD BETTER BE more reliable than this.
Old 09-14-2005, 11:58 AM
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Correct me if I am wrong but I don't think DS goes to 6th...
Old 09-14-2005, 01:02 PM
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Originally Posted by Green-Crayon' date='Sep 14 2005, 02:58 PM
Correct me if I am wrong but I don't think DS goes to 6th...
[snapback]170570[/snapback]
I think not also. I actually never have tried thoroughly though.
Old 09-14-2005, 01:57 PM
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DS will not make it all the way to 6th
Old 09-14-2005, 02:47 PM
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You're all wrong. Pre-16.2 or so, it never go to 6th in DS, but after having 16.2 installed, DS goes to 6th.
Old 09-14-2005, 04:17 PM
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Originally Posted by my530i' date='Sep 14 2005, 06:47 PM
You're all wrong. Pre-16.2 or so, it never go to 6th in DS, but after having 16.2 installed, DS goes to 6th.
[snapback]170662[/snapback]
Mine still only goes to 5th gear in DS (or Sport Mode). And as u can see in sig I am on 16.2.
Old 09-14-2005, 04:50 PM
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Originally Posted by my530i' date='Sep 14 2005, 05:47 PM
You're all wrong. Pre-16.2 or so, it never go to 6th in DS, but after having 16.2 installed, DS goes to 6th.
[snapback]170662[/snapback]
Hummm. I keep hearing conflicting things on this issue. Mine has never shifted to 6th automatically at up to some slow highway speeds as far as I recall. And, invariably, as far as I know, I always have to shift manually to 6th when I want to get there--which is quite frequently. I am going to test it thoroughly tomorrow if I remember/have the time--although I don't intend to accelerate to redline in 5th. ~0(;^) I'm getting too curious about does it ever and if so when or doesn't it ever.
Old 09-15-2005, 12:20 AM
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I have 16.2 in mine and it don?t go to 6 in the ds mode i tryed to the red line in 5th
Old 09-15-2005, 12:44 AM
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Originally Posted by cobradav' date='Sep 15 2005, 01:17 AM
[quote name='my530i' date='Sep 14 2005, 06:47 PM']You're all wrong. Pre-16.2 or so, it never go to 6th in DS, but after having 16.2 installed, DS goes to 6th.
[snapback]170662[/snapback]
Mine still only goes to 5th gear in DS (or Sport Mode). And as u can see in sig I am on 16.2.
[snapback]170689[/snapback]
[/quote]
Same with me and I am on 17.1
Old 09-15-2005, 04:40 AM
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Originally Posted by Merzbow' date='Sep 14 2005, 02:45 PM
Well I went in for a couple things recently, SOS broken, wanted 18.1 to improve DS performance, etc. They couldn't fix SOS without replacing the TCU, so that took another day. I must say that DS is exactly ONE MILLION times better than it was previously. It still keep the gear ratio low when accelerating quickly, but unlike before it now upshifts quickly when I let off the pedal. No more embarrassing 4500 RPM stretches while gliding to the grocery store at 35 mph. I haven't yet tested if I actually get 6th gear now on the highway in DS.

So I've now joined the TCU replacement club, at only like 4000 miles. This is not cool. I'm worried about what happens when I go off warranty, they told me that it's around $2000 to swap the TCU off warranty. It HAD BETTER BE more reliable than this.
[snapback]170567[/snapback]
Welcome to the CLUB.I already had 4 TCU UNITS replaced,($2000 cost to BMW for each one),at about 4,000 miles because of SOS problems.So far everything is ok now.
cheers
vern


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