freaky transmission experience...
Thread Starter
Pro
Joined: Oct 2004
Posts: 546
Likes: 1
From: Zurich, Switzerland
freaky transmission experience...
Today I was standing at a light before getting onto a entrance ramp to the tollway and as the light turned green I punched the car pretty hard and reached 50-60mph or so at the end of the entrance ramp and was at about 5500 rpm and the tranny was stuck at D3 and would not shift up!!! I released the accelerator and still nothing until I switched to manual mode...Got a bit freaked out as this has not happened. In my experience with auto/manuals I expect the tranny to shift up the moment I relase the accelerator but in this case is has not happened....now this was about 5 minutes after the star of the car in about 30F temperature. What do you think? DO I have a issue?
Advanced
Joined: Apr 2004
Posts: 91
Likes: 1
From: SF Bay Area, CA
I had the similiar problem before. After a hard accelerate when exited a trun, the CS didn't up shift even I release the gas pedal and going downhill for some time. I don't remember was it before all the TB & updates, but it happened to me as well.
Moderator !x4
Joined: Jun 2003
Posts: 5,989
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From: Southeastern PA
I think its more likely to happen again. I have had it a couple of times, it seems that when you kick hard enough to switch programmes it does not expect you to then back off and takes a while (lifetime) to figure it out.
I tested it, if you just keep going to mach 1 it does change up, but at max revs. In those cases I usually switch to manual to make sure it does what I want to do.
I tested it, if you just keep going to mach 1 it does change up, but at max revs. In those cases I usually switch to manual to make sure it does what I want to do.
Instructor
Joined: Jun 2003
Posts: 178
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From: South Bay, CA
It is a 'feature' of tiptronics. There is a angular sensor on the steering wheel that senses if you're in a turn. The gear stays the same when you're inside a turn. After exiting the turn it will resume shifting.
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Joined: Nov 2004
Posts: 66
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I've noticed this several times, and while it is much different from any ther automatic I've driven, it is pretty cool. The system seems to think you are going to keep driving hard and just keeps the gear low, in case you are going to blast it again. When it happens I either throw it into manual and upshift, or slow down a little bit until gets the point. 
- Suneet
- Suneet
Thread Starter
Pro
Joined: Oct 2004
Posts: 546
Likes: 1
From: Zurich, Switzerland
well, slowing down did not help...I had to shift to manual to get back...I was also out of the turn...I think Porsche has gone OTT with the electronics on this car....I think most other carmakers have overdone it as well. Oh well, will learn to accept it and learn to deal with it. The car still rocks...best I've ever driven...little stuff does not take away from me enjoying this machine
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Instructor
Joined: Jun 2003
Posts: 178
Likes: 0
From: South Bay, CA
There is a delay between you exit the turn and when it resumes shifting.
It doesn't matter whether you drive hard or not; it will hold the gears - these are separate features. When you drive harder or when you start from a traffic light, you'll enter the turn at lower gear and that's why it revs higher than you'd like.
When you drive like a grandma, the gear may be too high before the turn so it will feel like a 5 ton vehicle cauz the gear will stay high during and after the turn.
It doesn't matter whether you drive hard or not; it will hold the gears - these are separate features. When you drive harder or when you start from a traffic light, you'll enter the turn at lower gear and that's why it revs higher than you'd like.
When you drive like a grandma, the gear may be too high before the turn so it will feel like a 5 ton vehicle cauz the gear will stay high during and after the turn.
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