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C5 A4 question re: shifter function

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Old Feb 25, 2005 | 10:37 PM
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Default C5 A4 question re: shifter function

The C4 featured a higher pressure shift mode in the A4 when the shifter was placed into "3" instead of "OD". Does the C5 feature the same increased internal transmission line pressure mode?
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Old Feb 25, 2005 | 11:07 PM
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Interesting q .....
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Old Feb 26, 2005 | 04:15 AM
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Thanks, but no answer as yet. In the C4, placing the shifter in "3" would result in sharper, harder shifts. I wonder if the same logic was built into the C5 transmission. Anybody?
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Old Feb 26, 2005 | 07:50 AM
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ttt
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Old Feb 26, 2005 | 08:07 AM
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That's an ET question.
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Old Feb 26, 2005 | 08:16 AM
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Originally Posted by JACKAL0PE
That's an ET question.
Or repost in C5 Tech - really sharp folks over there.

EG
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Old Feb 26, 2005 | 11:30 AM
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Default Not sure

I am not sure about your question. But the owners manual does say the C5 has more power when left in 3rd gear.
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Old Feb 26, 2005 | 01:32 PM
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Originally Posted by shurite44
I am not sure about your question. But the owners manual does say the C5 has more power when left in 3rd gear.
Yes, but that probably relates to "pulling" power or something equally pedestrian because the engine remains in its power band. Remember, owners manuals are still written at the level of technical expertise required by folks who don't really want or need to know all the details of their vehicles.

I had considered posting at the C5 tech site. Probably an outstanding suggestion. Sorry, fellow Corvette lovers, this is my first post. I had anticipated that there is significant cross over between the sites. Possibly not.

I don't want to do anything if the site monitors are going to move it over anyway. No need for dual postings.

Thanks everyone.
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Old Feb 26, 2005 | 02:24 PM
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I've read multiple times (and then tried it myself) that when the A4 is in "3" ... WOT shifts occur at a slightly higher RPM.

It did this exact thing in mine; and I tested it before I had any reprogramming done.
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Old Feb 26, 2005 | 02:33 PM
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Originally Posted by Mike Mercury
I've read multiple times (and then tried it myself) that when the A4 is in "3" ... WOT shifts occur at a slightly higher RPM.
That seems to be the answer, yes, there is some difference in transmission performance when the shifter is left in 3rd, rather than placed in OD. The C4 guys use 3rd when running hard because the higher internal pressure reduces wear on the clutch pack by locking them down tighter, allowing less slippage at higher RPMs when shifting. I wondered if the same protocol was used by C5 drivers whose cars have the A4.

Thanks!
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