Six speed auto gear ratio?
Team Owner
Joined: May 2004
Posts: 82,175
Likes: 1,319
From: McKinney TX
St. Jude Donor '21-'22-'23-'24
Here are all of them.
..GEAR......Mode..or..Option
............Z06...Std_6-spd...Z51_6-spd...6-spd_Auto...4-spd_Auto
..1st.......2.66....2.66........2.97.... .....4.02........3.06
..2nd.......1.78....1.78........2.07.... .....2.36........1.63
..3rd.......1.30....1.30........1.43.... .....1.53........1.00
..4th.......1.00....1.00........1.00.... .....1.15........0.70
..5th.......0.74....0.74........0.71.... .....0.85
..6th.......0.50....0.50........0.57.... .....0.67
Reverse.....2.90....2.90........3.28.... .....3.06........2.29
Axle Ratio..3.42....3.42........3.42......... 2.56.....2.73(or_3.15)
..GEAR......Mode..or..Option
............Z06...Std_6-spd...Z51_6-spd...6-spd_Auto...4-spd_Auto
..1st.......2.66....2.66........2.97.... .....4.02........3.06
..2nd.......1.78....1.78........2.07.... .....2.36........1.63
..3rd.......1.30....1.30........1.43.... .....1.53........1.00
..4th.......1.00....1.00........1.00.... .....1.15........0.70
..5th.......0.74....0.74........0.71.... .....0.85
..6th.......0.50....0.50........0.57.... .....0.67
Reverse.....2.90....2.90........3.28.... .....3.06........2.29
Axle Ratio..3.42....3.42........3.42......... 2.56.....2.73(or_3.15)
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Originally Posted by Fastphilly
What is the gear ratio for the new six speed auto transmission?
If you are concerned over the 1/4 mile, then even with the 2.56 rear end ratio, the A6 is so good it would be like having an A4 with a 3.90 rear end.
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
Originally Posted by Fastphilly
What is the gear ratio for the new six speed auto transmission?
Don't get hung up on higher number rear gear ratios, look at the overall final gearing.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Originally Posted by haljensen
Read SilverCoupes post on ratios and multiply trans gear X rear gears and you'll see that the new A6 with a 2.56 rear in first gear (10.29:1) is actually a lower FINAL RATIO than the Z51 6spd Manual (10.16:1) in first gear.
Don't get hung up on higher number rear gear ratios, look at the overall final gearing.
Don't get hung up on higher number rear gear ratios, look at the overall final gearing.
In other words if one is willing to put 4.10s in their 6 speed manual C6 what would be the corresponding swap for an A6 car if traction and fuel economy were not an issue?
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Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
I don't think there are any alternate gearsets for the A6 differential yet.
If there were it's basic math; 2.97 first @ 4.10 rear gear vs. 4.02 first gear @ X.XX rear gear.
Don't forget the advantage of the torque converter in the automatic, torque "multiplication" counts also.
If there were it's basic math; 2.97 first @ 4.10 rear gear vs. 4.02 first gear @ X.XX rear gear.
Don't forget the advantage of the torque converter in the automatic, torque "multiplication" counts also.
Drifting
Joined: Nov 2005
Posts: 1,745
Likes: 35
From: Turlock CA
The 3.42 should be an easy swap as it is a standard gear set. You may even find a complete diff from a wreak. You say traction isn't a concern so this should work well.
Stock the A6 will run through the quarter in 3rd at around 5600-5700 rpm. With 3.42 gears you will be in 4th at the same rpms. Either gear (3rd & 2.56 or 4th & 3.42) will pull to 130 mph at redline. I gotta believe with traction the 3.42 will run faster with the extra gear working for you. But this is all based on calculations and not experience so take it for what it's worth.
Stock the A6 will run through the quarter in 3rd at around 5600-5700 rpm. With 3.42 gears you will be in 4th at the same rpms. Either gear (3rd & 2.56 or 4th & 3.42) will pull to 130 mph at redline. I gotta believe with traction the 3.42 will run faster with the extra gear working for you. But this is all based on calculations and not experience so take it for what it's worth.
Burning Brakes
Joined: Sep 2005
Posts: 1,125
Likes: 1
From: Howell N.J
Originally Posted by LS1LT1
True, but if those with the 6 speed manuals (especially those of the higher revving heads and cam variety) are often looking to do rear end gear swaps wouldn't the same still hold true for the A6 guys? I mean the 'industry standard' for A4 H/C cars was/is 3.73s (even 4.10s for the real radical set ups...3.42s for the more 'street/strip' type cars) and that is obviously too steep for the A6 but I would think that a 3.42 or at least 3.15s would be needed on the A6 to get it up in the range quicker for serious track duty.
In other words if one is willing to put 4.10s in their 6 speed manual C6 what would be the corresponding swap for an A6 car if traction and fuel economy were not an issue?
In other words if one is willing to put 4.10s in their 6 speed manual C6 what would be the corresponding swap for an A6 car if traction and fuel economy were not an issue?
When available, I will have 3.15's installed with a A6 tune/program for the track.
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Originally Posted by JELSIS
When available, I will have 3.15's installed with a A6 tune/program for the track.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Originally Posted by glennhl
Check to see where this puts you, you will probably be in the middle of 4th gear, might as well go with the 3.42's.
Drifting
Joined: Dec 2002
Posts: 1,613
Likes: 0
To me the gearing feels great just need more HP!
1st revs quick
2nd reves good and
3rd pulls to 131
With power and traction it should make for a good semi steetable 10 sec ride IMO!
It would be great with a good size turbo
1st revs quick
2nd reves good and
3rd pulls to 131
With power and traction it should make for a good semi steetable 10 sec ride IMO!
It would be great with a good size turbo
