That's good to hear, I am going to order mine really soon. I an live with a little gear whine.

 

I went from 2.73's to 3.73's and my gas went from 21city/24highway to 18city/21highway. At 70 I am running at 2600 rpms. I did notice I can get about 1 to 2 more mpg by driving 65 instead of 75. I drive about 80 miles a day, mostly highway driving and it doesn't bother me. You will love them.

 

I don't know if you use your car for a daily driver but if you do...

I went from 2.73 to 3.42 in my A4. Perfect for the street and interstate. I cann't imagine driving 75-80 on the interstate for anything longer than about an hour with higher gearing. It's just too loud with exhaust. Their is alot of young street/drag racer bias that goes along with these cars. If this is you daily driver get 3.42. The pros far outway the cons. I think this thinking goes with cam, tq's, ect. It's just the "I don't want to do it twice" bug gets you along with advice from the race only crowd here that makes daily drivers over do everything and then the car drives like trash. Some will say their is not much difference between 3.42 to 3.73. That's true with just about every upgrade notch though. I small over do here and one there, ect and they add up to make something you didn't want. I car that is no longer a daily driver. Just something to thing about.

Jeff D.

 

I didn't read the rest of the posts but...
I went from 2.73's to GM Motive 3.73's. I had Detroit Speedworks install them and they are perfectly quiet. I noticed a huge difference and I would recommend ANY A4 to go with these gears. I dropped about 7 tenths with gears and pcmforless tuning (otherwise stock car except for CAI and !cat).

 

I drive 40 miles each day to and from work. I drive 90% of it on the highway. I was also debating for a long time whether to get 3.42's or 3.73's. I decided on the 3.73's and I love them. I do not have muffler, which is the same as a cutout, and it's not really that loud going down the highway. I day get 3.73's and don't bother with the 3.42's.

 

Like I said. Drag racer bias. How are the Nitto drag radials holding up on that 40 mile a day daily driver?

 

instead of just going with XXX gears based on everyone elses recommendation, I suggest finding out what YOU need.

If your looking for gears that are going to get you the best 1/4 times, the first step is to figure out what your goals are in the 1/4, then take a gear/tire calculator and figure out what gear is going to get you over the line at that MPH in the top of the gear you want...for example:

I want to trap 117 or so in the 1/4 which should be enough to get me 11's without having to get a bunch of traction and split the rear end...so using the RPM/MPH calculator at:

https://www.camaroz28.com/calcs/index.shtml

and plugging in a few different gear ratios, using 26 inch tall tires and 1.0:1 transmission gear ratio (4th gear for me, 3rd for you A4 guys) I come up with a 3.90:1 ideal gear ratio for me, which allows me to hit the finish line at 117MPH/5899 RPM...this also allows me additional room if I want to increase power more, and trap 120MPH I'll do it at a hair over 6000RPM. If I was to go with a 4.10:1 gear ratio, I'd be crossing the line at 6202 which probably wouldn't leave me much room for growth (depending on engine combo).

Since as far as I know you can't get a 3.90 gear for a GM 10 bolt rear, I will likely go with 3.73's. I will make that determination after I talk to someone knowledgeable (say Combination Motorsports) about an engine combo to get me there. If I'm gonna be winding the motor out to 6500 anyway, I could go ahead with the 4.10's

See? easy!

 

Nitto's are holding up good to my 80 mile round trip a day. Got around 14,000 miles out of the last pair, and they are the cheapest 315 with the exception on BFG DR's. Ohh, btw I like how you said "Drag racer bias" considering I have never been to the track. Like I said it's just preference on what you want. Anything is better than those crappy 2.73's.

 

Does anybody make 3.55's for the 10-bolt? That way the gearing would be right between 3.42 and 3.73. The best of both worlds.

 

2:73 to 3:42 delivered 2/10ths on the 1/4 mile, no change in fuel consumption , great SOTP feel. Go with a quite GM gear