Is there a big performance difference between the 3.42's and 3.73 gears. This is a daily driver, which has 2.73's now so what gear would you go with?

 

There is no reason to keep 2.73s. Horrible gears. I voted for 3.73s, and thats what I'm going to upgrade too.

 

I have 2.73's in right now. Decided to get 3.73's because of the 3800 converter I have.

I bet its one of differences where if you had 1 or the other you would be happy.

I rode in a 3.73 car with a Vig3600 and it sealed the deal on my 2.73 drivin self. Never ridden in an A4 3.42 car.

 

You would get better MPG with 3.42s if you're concern about that on your DD fbody. I used to get about 260-280 miles per tank on mix town/highway driving on 2.73s now with 3.42s I get about 200-220 miles.

 

342s are just fine with me .3 faster and 3mph in the 1/4. i miss cruzin at 80mph @1700 but its about 2300 now.mpg has dropped by 1,

 

I put headers and 3.42's in at the same time. Even untuned, my gas mileage has increased by 1 mpg and performance is much better. I can't wait to get her tuned. My mpg's gonna go up even higher. There's no reason to keep 2.73's. 3.42's are the best all around gear for the f-body IMO.

 

I just bought a 3.42 rear end myself...

 

If you're driving is mostly in town, there won't be much if any difference between 3.42's and 3.73's. If you do a fair amount of highway cruising, I'd go with 3.42's to keep the revs down.

 

do it once do it right 3.73's !!!

 

.42's rock. My all time gear ratio of choice.

Not ot mention that they are just about the strongest ratio for the venerable 7.5"...

 

Just change the rear in my son's car to 3.42's from 2.73. Made a big difference and still cruises nice on the highway. One thing for sure is with the new gears you will need to look at fixing the traction problem. From a standing start the car just incinerates the tires.

 

From the research I've done if you have 2.73's most go for the 3.42's. If you have an A4 car that had 3.23's the upgrade was to 3.73's. I have the 3.73's with a Yank SS3600, cam, etc. I think your gear should match any other mods you have planned in the future.

 

Auto= 3.73
6SP= 3.42

Best gear setup for the street my .02 Cents.

Have had both.

 

k, don't you mean the oposite?

auto 3.42's
6sp 3.73's

This makes more sense to me, I have 3.42's in my A4 with a vig 3200 and like em. Bought it that way, but if I'd were to do it it would be 3.73's, why not? Who buys a vehicle for economy now a days, lol. I will see once I cam my car If I want to change to 3.73's. All out performance, go 3.73's if worried about economy, etc go 3.42's and enjoy either way. You'll love the new found power, actually 'feeling' of power b/c you actually lose some to the ground.

 

2.73's to 3.42's here and very happy gained about .1 in the 60' and .2~.3 in the 1/8th plus 3 mph

 

Any guys going from 3.23 to 3.73 gears have et gains? I have searched before and can't remember any threads,thanx.

 

I voted 3.73's.. I love them. I had 2.73's previously. I only gained .1 but 2 mph by changing form 2.73's to 3.73's but I already had a Vig 3600 stall. the biggest think I noticed with the 3.73 gear is the launch. It hit hard and had to get some LCAs, LCA brackets and PHR to get the car to hook. Stock stall you will see a larger gain in ET and MPH with a gear change.

DadsZ28... I don't know about 3.23- 3.73 but I doubt it will be a huge gain especially since you already have a stall but it will for sure help a little.

 

i thought it was:

A4-3.73's
M6-4.10's

go with 3.73's, good top end gear
I went from 3.23's to 3.73's. Never took it to the track rite away to see if i got any gains but i would pull harder on rolls..

 

i picked 3.73 because if u ever want to make it a street/strip car it will get you down the track faster/ and you get up to speed faster for your DD

 

I had the 3.42 they were good but next time I would just get the 3.73
But 2.73 gears are good for 2 things... mpg if you commute and keeping the RPMs low
I drive 50 miles a day to work and its all freeway it does suck when I went back to the 2.73 if you have the 2.73 gears doing about 70 mph put your car into D and watch your rpms go up thats pretty much what it would be like with the 3.73.....
BUT if I didn't have to commute 50 miles each day I would Definetly put 3.73 back in don't go 3.42 if you gone that far just do 3.73.. my .02