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Gearing for Paddle Shift C6

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Old Jan 26, 2008 | 11:30 AM
  #21  
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Originally Posted by youout
For the 2007 A6 has anyone looked into the cost of switching to the GMC 2.73 gears ( 2008 option) without any other changes. I do not know if this can actually be done.
Dont bother. The 2.73 at most gives you .10 at the strip, probably more like .05. You can pick up far more than that at less cost by buying yourself a $500.00 HP Tuner and just disabling TM "upshifts". That change alone picked me up at least .15 seconds.
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Old Jan 26, 2008 | 11:52 AM
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Originally Posted by RAMAIR
Yeah 4.10's would kill first gear on the A6

1st 4.02 * 4.10 = 16.482
-- -- This would be, like my Ford tractor.
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Old Jan 26, 2008 | 12:10 PM
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Originally Posted by Spearfisher
I don't think the c6 needs anything taller than the 2.73's plus my warranty is still there
with the colder Wx and harder runflats low gear is a handfull
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Old Jan 26, 2008 | 04:51 PM
  #24  
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got the 3.15 in the A6 and feel that it should have come from the factory like this.
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Old Jan 26, 2008 | 06:31 PM
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Dealer said gears were $1,500 plus labor but they said GM would not give OK for software upgrade on the trany. GM says Feds tie their hands with making the after market mods. Not sure if I buy this but $1,500 killed the deal for me. DTE can do it all for a better value.
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Old Jan 26, 2008 | 07:36 PM
  #26  
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I have 3:15s with a tune and love them. SOP difference is huge. I am planing a wide body conversion so I can add some bigger meat to help with traction.
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Old Jan 26, 2008 | 11:23 PM
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Originally Posted by knkali
got the 3.15 in the A6 and feel that it should have come from the factory like this.
I have 3.15 too, and think they should be factory!
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Old Feb 2, 2008 | 09:41 AM
  #28  
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Originally Posted by ScottJ03
I have 3.15 too, and think they should be factory!
Tell me about the drivability. @ 75 miles/hr. what are you taching in 6th.
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Old Feb 2, 2008 | 10:01 AM
  #29  
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Tell me about the drivability. @ 75 miles/hr. what are you taching in 6th
Here's a table that has speed versus RPM for a variety of
combinations.

http://mysite.verizon.net/foofoo2/c6/
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Old Feb 2, 2008 | 10:26 AM
  #30  
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at 70mph I am at 1825 or close to that.
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Old Feb 2, 2008 | 12:36 PM
  #31  
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Anybody got the next step up? 3.56'S an A6? Chuck Cow seems to like this combo...Says is sick! Anybody got em? If so, how do you like it? Im trying to make a decision for Spring...
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Old Feb 2, 2008 | 01:42 PM
  #32  
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Originally Posted by aquaman
Here's a table that has speed versus RPM for a variety of
combinations.

http://mysite.verizon.net/foofoo2/c6/
very interesting table, have to go out and see if it matches on my car
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Old Feb 2, 2008 | 02:16 PM
  #33  
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I consider 3.15's the way they should have came, and 3.42's for the agressive cars. Just my opinion, but the cars definately do not feel over geared with either of them, even in light F/I apps.
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Old Feb 2, 2008 | 02:42 PM
  #34  
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Originally Posted by glennhl
I always get the biggest kick out everyone hating the 2.56's and wanting to go to the 3.15's. If someone with an A4 came on and said they wanted to put in 4.82's in their car, they would be laughed off the forum. But that is exactly what the A6 with 3.15's is like, an A4 with 4.82's.

I still think the stock 2.56's are an excellent street gear. It's like an A4 with 3.92's so it's excellent for acceleration, but it's also great in 6th gear for cruising and getting stellar fuel mileage.
Well said!!! I had 3.73's in my C5 A4, and the SOTP around town was great.....the nearly 3,000 RPM's on the highway was NOT! Its one of the reasons that I got rid of the car instead of investing another 2K to go back to a lower gear ratio........I LIKE the 2.56's too -- best of both worlds, and with gas at $4 a gallon by spring, lower RPM's and better mileage looks better and better............
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