3.73 gears
Melting Slicks
Joined: Dec 2003
Posts: 2,857
Likes: 2
From: pawleys island sc
how do you intend to use the car? Daily driver? dragster? highway driving?Road raceing?
373's have been installed by many members but they were installed for specific reasons.
Your mileage wiil go down, your top speed will go down. BUT it'll take off from a stop a LOT quicker.
BTW, in order to change over to 373 or 342 you will have to change out the whole rear end, not just the gears.
373's have been installed by many members but they were installed for specific reasons.
Your mileage wiil go down, your top speed will go down. BUT it'll take off from a stop a LOT quicker.
BTW, in order to change over to 373 or 342 you will have to change out the whole rear end, not just the gears.
Burning Brakes
Joined: Jul 2007
Posts: 1,139
Likes: 6
From: Granite Falls WA
i just changed out my 2.73's for 3.42's. (and boy is this car fun now!)
at 70 mph i was at 1500 rpm, no i am at 2100 rpm.
performance? better! much more fun from a standing start and when you press the "go" button at around 50 mph, well, let's just say (with a dyno tune) it drops down a gear or two and tries to go sideways.
and my c5 coupe only has 344 rwhp and 350 tq.
the drive home from the tuner was about 150 miles and i seem to have lost about 2 mpg (was getting around 30.2 now getting 28.2)
for a sunny day driver i recommend 3.42's.
jeff
at 70 mph i was at 1500 rpm, no i am at 2100 rpm.
performance? better! much more fun from a standing start and when you press the "go" button at around 50 mph, well, let's just say (with a dyno tune) it drops down a gear or two and tries to go sideways.
and my c5 coupe only has 344 rwhp and 350 tq.the drive home from the tuner was about 150 miles and i seem to have lost about 2 mpg (was getting around 30.2 now getting 28.2)
for a sunny day driver i recommend 3.42's.
jeff
Racer
Joined: Feb 2010
Posts: 388
Likes: 0
From: Effingham IL
Even if you want to take it to the strip its a good geari just changed out my 2.73's for 3.42's. (and boy is this car fun now!)
at 70 mph i was at 1500 rpm, no i am at 2100 rpm.
performance? better! much more fun from a standing start and when you press the "go" button at around 50 mph, well, let's just say (with a dyno tune) it drops down a gear or two and tries to go sideways. and my c5 coupe only has 344 rwhp and 350 tq.
the drive home from the tuner was about 150 miles and i seem to have lost about 2 mpg (was getting around 30.2 now getting 28.2)
for a sunny day driver i recommend 3.42's.
jeff
at 70 mph i was at 1500 rpm, no i am at 2100 rpm.
performance? better! much more fun from a standing start and when you press the "go" button at around 50 mph, well, let's just say (with a dyno tune) it drops down a gear or two and tries to go sideways.
and my c5 coupe only has 344 rwhp and 350 tq.the drive home from the tuner was about 150 miles and i seem to have lost about 2 mpg (was getting around 30.2 now getting 28.2)
for a sunny day driver i recommend 3.42's.
jeff
Burning Brakes
Joined: Jul 2007
Posts: 1,139
Likes: 6
From: Granite Falls WA
i bought mine from RPM. i got the Stage 2.
check them out online.
http://www.rpmtransmissions.com/
jeff
check them out online.
http://www.rpmtransmissions.com/
jeff
Racer
Joined: May 2009
Posts: 399
Likes: 3
From: jacksonville fla
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Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Going from 2.73s to 3.73s will make a huge difference. Stick a Yank SS3200 in there at the same time, as most of the labor will already be accomplished with the rear-end changeout, anyway. You will not believe it!
Ed
Ed
Drifting
Joined: Dec 2004
Posts: 1,706
Likes: 5
From: Toronto Ontario
Absolutely. Just added a Yank SS3200 and a 3.42 diff myself. The car is a totally different car now. Make sure you get a tune too.
Le Mans Master
Joined: Jun 2006
Posts: 6,979
Likes: 31
From: Wichita KS
I will have a rebuilt 3.42 diff with better C6 Z06 cone springs (for better limited slip holding) and upgraded left and right C6 Z06 shafts and new seals for $850 shipped. I will have it in 3 weeks when I get home.
Last edited by Corvette Don; Jul 24, 2010 at 12:25 PM.
Burning Brakes
Joined: Aug 2006
Posts: 753
Likes: 2
From: Denville NJ
I did that jump in my '96 Camaro. It has a huge noticable improvement on performance, but be ready to rev up when you are on the highway. If you are performance minded and race a lot, the 3.73 is for you. If you are more concerned with daily driving, economy, and reasonable performance improvement, then the 3.42 is for you if you are coming from a 2.73.
Drifting
Joined: Apr 2005
Posts: 1,620
Likes: 3
From: Vancouver WA
i bought mine from RPM. i got the Stage 2.
check them out online.
http://www.rpmtransmissions.com/
jeff
check them out online.
http://www.rpmtransmissions.com/
jeff
Racer
Joined: May 2009
Posts: 399
Likes: 3
From: jacksonville fla
Racer
Joined: Feb 2010
Posts: 388
Likes: 0
From: Effingham IL
If you go with a stall, A good trans cooler is must or you will have cooked trans. I still say unless you drag the car on a regular bassis 3:42 is the gear that works best. I would buy a 3:55 center if someone made one but it would be custom and to pricey for the diff.
Burning Brakes
Joined: Mar 2006
Posts: 813
Likes: 13
From: Hampton Va
I went from 3;15 to 3;73 and wish that i had went with 3;90sAlso if you think you might be going to run it at the track, defently install a stall while you are in it doing the gears,Fun factor is alot better with the new gears though.
Safety Car
Joined: Jul 2005
Posts: 4,205
Likes: 2
From: Chicago-NW Burbs Illinois
3:73's here also w/3400 Vig 5disc stall (previously SS3600). Would't change a thing. IMO it's the perfect gear for an A4. I had 2:73's originally and the car was WAY too sluggish for me. I went with RPM Transmissions stg 2 3:73 diff and it's been put to the test with many hard launches and 1.5 60FT times. Going from 2:73's to 3:73's and a stall will be a HUGE difference. Go for it!
