jasonmc

I have read numerous opinions about which gearing is best, 410's, seem to be the answer, but all guys seem to have 6 spds. Does anyone have a stock auto, paddle shift other than Corsa sports and Vararam running 4:10 gears?

What do you notice verses the stock?

CHASLS2

4:10'S would be way over the top for a A6, 3:15's should work fine!

RAMAIR

Yeah 4.10's would kill first gear on the A6

1st 4.02 * 4.10 = 16.482
2nd 2.36 * 4.10 = 9.676
3rd 1.53 * 4.10 = 6.273
4th 1.15 * 4.10 = 4.715
5th .85 * 4.10 = 3.485
6th .67 * 4.10 = 2.274

3.15's would be a better choice...

* 3.15 = 12.663
* 3.15 = 7.434
* 3.15 = 4.819
* 3.15 = 3.622
* 3.15 = 2.677
* 3.15 = 2.110

jasonmc

You know this is sad to admit, but I don't even know what my stock rato is. Would you guys either change your gearing or simple save $ for a SC?

chiefg

if you have an 07 A6 your rear gears are 2.56.

Stinger !!

Change the gears...save your GM warranty....BIG difference in SOTP performance...DTE offers the 3:15 gear set with warranty.

Add a SC...kiss the GM warranty goodbye along with resale value down the road! But BIGGER SOTP results! (SOTP = Seat Of The Pants)

My .02 cents

jasonmc

Has anyone done it to have an estimated cost? How does it fair against a stock 2.56 gear setting?

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.

SoldSyclone

Depends on your goals the stock gears are great for a car that traps 120-126 you dont need to shift into fourth, and you are at or near redline in 3rd

Now if you have a slower car or dont plan to mod much or drag race gears "give a great feel"

Remember with the stock A6:
1st gear is like a m6 with 3.90's
2nd is close to a m6 with 3.42's
and 3rd pulls hard to 133 at the track

One less shift can win a lot of races

CHASLS2

I am happy with my A6 the way it is, but will be doing headers, cam and heads.

11secondGP

So how about with 2.73s what is the max mph in 3rd? Is it 124-125mph?

* 2.73 = 11.0019
* 2.73 = 6.4428
* 2.73 = 4.1769
* 2.73 = 3.1395
* 2.73 = 2.3205
* 2.73 = 1.8291

rulez

I have the 2.73 A6 and it's enough right now. In fact, I really like it.

I agree with you on the 3.15. I had a A4 with 3.73 and know what that was like. I looked at the ratio numbers and thought about the traction issues I had with the 3.73 1st-2nd. With sticker tires and a converter it would have been better, but no thanks. It was loads of fun, but traction limited.

SoldSyclone

Correct so your max trap will be 121-122 at 6500 in 3rd.

Remember the track takes the avg of the last 60 feet to calculate MPH

glennhl

The only thing I don't know is if the converter is locked up under WOT? If it's locked then the 2.73 is good for 124 at 6500 rpm. If there is a 4% converter slip, this comes down to 119.

Dave_Busch

Like every one said, 4.10's are too much for an A6.

We have done both 3.15's and 3.42's. I personally like the 3.42's but both are great choices.

From C6ZO62C8

I don't think the c6 needs anything taller than the 2.73's plus my warranty is still there

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.

jasonmc

I don't care anything about going to the track but if another stock vette is beside me then I want to have an edge. My goal is from red light to red light.

glennhl

Just because you have lower gears does not always give you the advantage. For example, from a dig you may spin because of your lower gearing. Or from a roll, you may have to start out in 3rd gear where the other car with stock gears is still in 2nd and has the advantage until his car shifts.

From C6ZO62C8

check your dealer, they should be able to install it and I would figure if they do it you retain your factory warranty