Gears & Axles Driveshafts | Rearends | Differentials | Gears | 12 Bolt | 9 Inch | Dana

3.42's or 3.73's for my A4?

Thread Tools
 
Search this Thread
 
Old 06-04-2005, 07:24 PM
  #1  
12 Second Club
Thread Starter
iTrader: (1)
 
2002LS1Z's Avatar
 
Join Date: Oct 2004
Location: Raleigh, NC
Posts: 280
Likes: 0
Received 0 Likes on 0 Posts
Default 3.42's or 3.73's for my A4?

Been thinking of doing a gear swap soon. Right now I do not have a traction problem at the track on street tires. My car usually doesn't spin at all on launch. What kinds of reductions in ET are possible with 3.42s, 3.73s? BTW, no opposed to running DR's but would prefer to use street tires since the rears are so delicate on these cars. Gas mileage isn't a concern. Suggestions?
Old 06-04-2005, 08:47 PM
  #2  
TECH Fanatic
iTrader: (3)
 
Blacker's Avatar
 
Join Date: Aug 2003
Location: Austin, Texas
Posts: 1,670
Likes: 0
Received 1 Like on 1 Post
Default

I had 3.42's and they were a nice improvement over the 2.73's. I broke the 10 bolt and opted for the 3.73's for a little more gear. 3.73's are ideal for an A4.
Old 06-04-2005, 10:42 PM
  #3  
9 Second Club
iTrader: (37)
 
cablebandit's Avatar
 
Join Date: Nov 2001
Location: Cleveland, OH
Posts: 7,903
Likes: 0
Received 1 Like on 1 Post

Default

as far as gas mileage...i got the same on the highway with 3.23 or 3.73...20mpg. I have a 3.73 rear complete for sale
Old 06-05-2005, 12:36 AM
  #4  
TECH Senior Member
iTrader: (4)
 
ULTIMATEORANGESS's Avatar
 
Join Date: Mar 2003
Location: eatontown,nj
Posts: 10,976
Likes: 0
Received 17 Likes on 15 Posts

Default

3.73s.
Old 06-05-2005, 01:19 AM
  #5  
TECH Addict
 
ActionJack's Avatar
 
Join Date: Feb 2004
Location: Michigan
Posts: 2,335
Likes: 0
Received 0 Likes on 0 Posts
Default

I am taking the car in for a rear pinion seal leak and figured I would do a gear swap and will be doing a 3.42 from my 3.23. Nothing radical but hopefully enough to give me a little edge. Also, I am not trying to get ETs at the track just to get a little quicker luanch without sacrificing top end.

I am also basing it in part on the this gear selector and rpm range guide:

LINK


And I plan on changing shift points so I change gears at a slightly higher RPM at my following tune.
Old 06-05-2005, 04:17 AM
  #6  
TECH Addict
iTrader: (2)
 
35th SS's Avatar
 
Join Date: Dec 2001
Location: Hawaii track track.
Posts: 2,622
Likes: 0
Received 1 Like on 1 Post

Default

put some 3.73s in there.been there done that.good luck.
Old 06-05-2005, 07:41 AM
  #7  
11 Second Club
iTrader: (1)
 
LS1_PNYTAMR's Avatar
 
Join Date: Dec 2004
Posts: 1,627
Likes: 0
Received 0 Likes on 0 Posts
Default

run some 4.10's! that will help you the most! 4.10's in a auto, 4.33's with a 12 bolt in a 6sp lol me personally ill have to run a taller tire with my 4.10's, but that is cool, wont have any problems hooking up.

if u have 3.23's right now u wont fill any difference with 3.42's... only way i say do it is if you see a set for 50$ for sale and can get a cheap install kit and do it urself.. you will wont notice that much with the 3.73's...




All times are GMT -5. The time now is 10:49 PM.