A4 + 28" tire. 3.73 or 4.10?
#1
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Another one those threads, A4 3.73's or 4.10's. I'm trying to decide which gear will best fit my car and my wants. I currently have a 3200 stall and will be doing a cam swap and will be shifting at 6400 rpm. I don't do a whole lot of hwy driving and it isn't my DD. I'm switching to a 325/45/17 M&H drag radial which is a 28" tire. I do go to the track quite a bit in the summer months and i'm wanting a gear that is going to make it nasty-er to say the least. Some concerns i have is running out of gear in the 1/4 if i go with a 4.10. Should i be OK with the 28" tire and raised shift points? I also here that the 3.73 is the best all around gear choice for a street/strip car without being to much. I've never rode in an A4 with anything different than a 3.23 so i don't know what to expect. I'm hoping some A4 guys will chime in with some helpful input.
#2
TECH Fanatic
Join Date: Jan 2011
Location: Michigan
Posts: 1,358
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Personally I think 3:73s is the way to go....the a4 responds perfect to this ratio, just enough to hook (sometimes). 4:10s I think would be too much gear, I don't possibly see how you could even reap the benefits with an a4. The m6 can handle the 4:10s better because of overdrive...I went 2:73s to 3:73s and it's the best move I've made thus far..
Really woke my *** up while driving, theirs no way I would even consider 4:10s.
Really woke my *** up while driving, theirs no way I would even consider 4:10s.
#3
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I have a 98 A4 and went from a 2:73 to a 4:10 and love it and I run with a 26in tall tire and i drive it on the street. It would hit 4th just going across the line in the 1/4 and that was on a 100 shot and on Et's DR tires. It ripped out of the hole and it a blast on the street. I was running mid 13's at 105mph on motor and low 12's at 113-114 on the 100 shot and I was leaving at 1500 rpm. It runs about 2500 at 70.
#5
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
I have a 98 A4 and went from a 2:73 to a 4:10 and love it and I run with a 26in tall tire and i drive it on the street. It would hit 4th just going across the line in the 1/4 and that was on a 100 shot and on Et's DR tires. It ripped out of the hole and it a blast on the street. I was running mid 13's at 105mph on motor and low 12's at 113-114 on the 100 shot and I was leaving at 1500 rpm. It runs about 2500 at 70.
and you only run 2500 at 70? With the 3.23's i'm at ~2200 at 70.
#7
11 Second Club
iTrader: (2)
Join Date: Dec 2005
Location: Lititz,Pa.
Posts: 128
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
With a 28" tire go with the 4:10s IMO. Sure most people(including me)like 3:73s in their A4s but most people are running 26" tires and thats a big difference.The 4:10s will work good with the big tires.
Trending Topics
#8
TECH Fanatic
Join Date: Jan 2011
Location: Michigan
Posts: 1,358
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
At 70mph with 2:73s I was at 1900rmp....now with 3:73s at 55mph I run 1900 rpm.
Either way... 3:73s OR 4:10s.. just has to suit your dd/track needs..
I just go with the saying a4=3:73
m6=4:10
If my car was only a weekend straight up fun car I'd get 4:10s though..
Either way... 3:73s OR 4:10s.. just has to suit your dd/track needs..
I just go with the saying a4=3:73
m6=4:10
If my car was only a weekend straight up fun car I'd get 4:10s though..
#9
11 Second Club
iTrader: (127)
Join Date: Jun 2002
Location: MS
Posts: 984
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech20year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
My car is a wkend (or whenever my wife lets me) car. I currently have 3.73s. great for performance and driving. guess they are the best of Both worlds. I'm currently goin thru traps at 5900-6100 rpms in 3rd. Trans shifts at 6600. I will be installing a 12 bolt with 4.11s hopefully within the week. I too am worried about this setup. but I will probably switch to 28" as well. this too me is the best option..... will raise gear ratio slightly making it Slightly more streetable AND increase traction due to the taller sidewall. but that IMO. Being that the only long trip I make is only Once a year and only 100 miles, I'm not concerned with hwy driving.
are u still running 10 bolt?? Not so sure 4.11s will get along so well with a 10 bolt. Lol
are u still running 10 bolt?? Not so sure 4.11s will get along so well with a 10 bolt. Lol
#11
On The Tree
iTrader: (2)
Join Date: Feb 2010
Location: ms
Posts: 171
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
i have 3.73 with my setup and i hit the track at least once a month and do everything else in it. im seriously thinking about going up to 4.10 bc i have a 28inch tall tire aslo but we only have a 1/8 mile track here and plus i dont think the 4.10 will be that bad
#13
Launching!
Join Date: Sep 2009
Location: Toronto, Ontario, Canada
Posts: 266
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
With you still being on the 10bolt, id stay far away from the 4.10, id probbaly just leave the 3.23 as they have more teeth and are thicker then the 4.10. Id change gears when your ready to change rears.
#17
12 Second Club
iTrader: (10)
Join Date: Aug 2010
Location: Newton, MA
Posts: 234
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Put in my rear with 4.10's and 28" tall tires about a month ago and will never go back. Haven't been to the track yet but it's perfectly fine for cruising doing 65 I'm at 2400-2500. I used the richmond gear calculator and the 4.10s with 28" is nearly the same as 3.90s with 26" tires
#18
On The Tree
iTrader: (4)
Join Date: May 2009
Location: nebraska
Posts: 117
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Another one those threads, A4 3.73's or 4.10's. I'm trying to decide which gear will best fit my car and my wants. I currently have a 3200 stall and will be doing a cam swap and will be shifting at 6400 rpm. I don't do a whole lot of hwy driving and it isn't my DD. I'm switching to a 325/45/17 M&H drag radial which is a 28" tire. I do go to the track quite a bit in the summer months and i'm wanting a gear that is going to make it nasty-er to say the least. Some concerns i have is running out of gear in the 1/4 if i go with a 4.10. Should i be OK with the 28" tire and raised shift points? I also here that the 3.73 is the best all around gear choice for a street/strip car without being to much. I've never rode in an A4 with anything different than a 3.23 so i don't know what to expect. I'm hoping some A4 guys will chime in with some helpful input.
Last edited by Big Red Z28; 04-11-2011 at 05:42 PM. Reason: spelling
The following users liked this post:
z28a4 (02-13-2020)