3:15 versus 3:42
Thread Starter
Racer
Joined: Oct 2003
Posts: 424
Likes: 2
From: Galena, OH
3:15 versus 3:42
I am considering switching out my 2:73 rear for a bit more quick response off the line. I am curious how big a difference I will notice in a 3:42 vs a 3:15. I am leaning towards the 3:15 since it was an option available on my 2002. I am concerned if I go more than the 3:15 I may void my GMP extended warranty. Any advice will be greatly appreciated! Thanks 
Le Mans Master
Joined: Feb 2004
Posts: 5,482
Likes: 1
From: Living the Taxation Dream Indiana
I have no idea about the warranty, but I went from 2.73 to 3.42 and thought it was just right. I also added a Yank 2800 stall which is a must while you are doing all of the labor to change the diff. My only thought is that I maybe should have went with a 3200 stall instead of the 2800.
It all depends on what you are wanting to do, but I would not recommned going to all of the trouble to change gears only to go from 2.73 to 3.15. I would go at least 3.42 and at a minimum, a 2800 stall. Good luck and post some more about your driving habits if you want a more detailed recommendation
It all depends on what you are wanting to do, but I would not recommned going to all of the trouble to change gears only to go from 2.73 to 3.15. I would go at least 3.42 and at a minimum, a 2800 stall. Good luck and post some more about your driving habits if you want a more detailed recommendation
Le Mans Master
Joined: Feb 2004
Posts: 5,482
Likes: 1
From: Living the Taxation Dream Indiana
Originally Posted by 02blueelectron
the 3.15 sucks for performance on an a/4. iwent w/3.42and a ss3200 converterand get 1.70's 6o fts .w/stock tires you can smoke em anytime w/ease
Burning Brakes
Joined: Oct 2004
Posts: 769
Likes: 0
From: simpson town Mo
Originally Posted by Ken1234
I changed from the 2.73 to 3.42, but did not change my TC. I went to the dragstrip, 1/8 mile, and had absolutely NO CHANGE in my ET or mph.
This really surprised me. Not worth the cost of making the change.
This really surprised me. Not worth the cost of making the change.
Was th weather the exact same?Track conditions? I too had the same experiance with the 3.42 but alot had to do with the tune and the weather.Also do you feel any change in take offs? Harder stronger faster feeling?
Le Mans Master
Joined: Feb 2004
Posts: 5,482
Likes: 1
From: Living the Taxation Dream Indiana
Originally Posted by Ken1234
I changed from the 2.73 to 3.42, but did not change my TC. I went to the dragstrip, 1/8 mile, and had absolutely NO CHANGE in my ET or mph.
This really surprised me. Not worth the cost of making the change.
This really surprised me. Not worth the cost of making the change.
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Racer
Joined: Apr 2005
Posts: 315
Likes: 0
From: Johnstown PA
I'm going from the 3:15's to the 3:42's, I know its a small improvement percentage wise, but cost wise it was better for me right now and it is still an upgrade. I also did the Yank Ss 3200 at the same time, there is a noticable difference, or at least for me I noticed a difference.
Melting Slicks
Joined: Jun 2001
Posts: 2,743
Likes: 3
From: Davie Florida
Originally Posted by 1stC5weiss
I'm going from the 3:15's to the 3:42's, I know its a small improvement percentage wise, but cost wise it was better for me right now and it is still an upgrade. I also did the Yank Ss 3200 at the same time, there is a noticable difference, or at least for me I noticed a difference.
Safety Car
Joined: Jul 2005
Posts: 4,275
Likes: 4
From: Vancouver WA
Originally Posted by Dave-T
If I were to make a change I would go with the 3.42's as well. However I would NOT say that 3.15's suck for performance on an A4. I have run a 1.65 60 foot with my 3.15's and an 11.85 1/4 mile.
Le Mans Master
Joined: Aug 2000
Posts: 5,294
Likes: 2
From: Suffolk, Long Island NY
Originally Posted by Mitch C
The difference you feel is the SS3200, swapping gears once you have a decent T/C won't gain you much in the way of performance. Especially going from 3.15s to 3.42s.
It won't even be a tenth at the track. It will only make the pedal feel tighter. 3.73's would make it even tighter, like stock. But still, not much of a gain at the track.
Uber Waxer
Joined: May 2004
Posts: 8,651
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From: Hanover MD
Cruise-In 8-9-10-11 Veteran
CI 9, 10 & 11 Car Show Winner
St. Jude Donor '08-'10
Originally Posted by Face
It'll feel like you gained 75+ HP!
thats what im hoping.....doing kooks headers and off road x at the same time as well along with a tune....maybe it will feel like 100hp!
Team Owner
Joined: May 2003
Posts: 23,480
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From: East Meadow NY
St. Jude Donor '12
Originally Posted by MyToyC5
I am considering switching out my 2:73 rear for a bit more quick response off the line. I am curious how big a difference I will notice in a 3:42 vs a 3:15. I am leaning towards the 3:15 since it was an option available on my 2002. I am concerned if I go more than the 3:15 I may void my GMP extended warranty. Any advice will be greatly appreciated! Thanks
Chris
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Originally Posted by Mitch C
The difference you feel is the SS3200, swapping gears once you have a decent T/C won't gain you much in the way of performance. Especially going from 3.15s to 3.42s.
Mitch,
I think I have almost made up my mind to go with the Yank SS3200. However, as you know, I have a mild heads/cam job on my car, and have really decent low-end torque. I really like that the car shifts at 6200 on the 1-2 and 6400 rpm on the 2-3 shift. That runs the mph out pretty good with the 3.15s. I would lose a lot of that with 3.42 gears, and don't really think they would do much for me, acceleration-wise, over the 3.15s. I do want a car that does not feel loose in normal driving, yet really gets with the program when you punch it. I hope to get rid of, or at least improve response, in that zone about 37-38 mph where the car only downshifts to second gear, rather than first, and I'm hoping that the car will really jump at freeway speeds when downshifted (actually it's pretty good following a high speed downshift now..but even more would be great!).
Do you think the 3.42s would do that much for me as far as reducing any perceived looseness or increasing the cars performance on the street? Thanks!
Ed