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2.73 to 3.42?

This is a discussion on 2.73 to 3.42? within the Drivetrain forums, part of the LSx Technical Help Section category; I want to get rid of the 2.73's. Not sure what to go to though. Is it worth it to ...

  1. #1
    Member tg580's Avatar
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    2.73 to 3.42?

    I want to get rid of the 2.73's. Not sure what to go to though. Is it worth it to go to 3.42's? My rear tire will be a 295/35/18.

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    Veteran Hi-Po's Avatar
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    Are you A4 or M6....

    Most A4 guys go with 3.73's. Most M6 guys go with 4.10's.

    Im M6 and have 3.73's. It runs great, sometimes I wonder what it would do with 4.10's though.

  3. #3
    Member tg580's Avatar
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    Im A4

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    Powerstrokin LT1 > LS1's Avatar
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    I have 2.73's in my lt1. I need 3.73's to try and keep up with you guys in your fancy ls1 cars lol.


    I run a 275 f1's on chrome ws6 17's I hook on the street real good.

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    Junior Member Rob Petyo's Avatar
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    3:42's with the A4 is just fine for the street

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    Veteran Hi-Po's Avatar
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    Quote Originally Posted by Rob Petyo View Post
    3:42's with the A4 is just fine for the street
    3.73 with an a4 is just fine for the street. Better in fact in most people opinion.

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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by Hi-Po View Post
    3.73 with an a4 is just fine for the street. Better in fact in most people opinion.
    ditto

  8. #8
    Junior Member Rob Petyo's Avatar
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    Quote Originally Posted by Hi-Po View Post
    3.73 with an a4 is just fine for the street. Better in fact in most people opinion.
    depends if you still want gas milage - I am very happy with 3:42's. I noticed you have a 6 speed, we are talking about an auto...
    Last edited by Rob Petyo; 07-07-2008 at 06:02 PM. Reason: removed an image showing burnout at the track with 3:42 gears

  9. #9
    Veteran Hi-Po's Avatar
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    Quote Originally Posted by Rob Petyo View Post
    depends if you still want gas milage - I am very happy with 3:42's. I noticed you have a 6 speed, we are talking about an auto...

    Click for full size
    I know we are talking about auto. Thats why I offered 3.73's and not 4.10.I guess its personal preference. Most people will answer that question with... swapping in 3.42's is a waste of time and money. But to each their own.
    Last edited by Hi-Po; 07-07-2008 at 04:10 PM.

  10. #10
    Junior Member Rob Petyo's Avatar
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    Quote Originally Posted by Hi-Po View Post
    I know we are talking about auto. Thats why I offered 3.73's and not 4.10.I guess its personal preference. Most people will answer that question with... swapping in 3.42's is a waste of time and money. But to each their own.
    Most people?

    Here is the thread and it seems to me that "most people" in your opinion is YOU!

  11. #11
    ArtistFormerlyKnownAsMac Silver Streak's Avatar
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    Isn't 273 a 2 series carrier and anything above 308 (or was it 323) a 3 series? Meaning the gears aren't swappable? Or are there gears specifically for those carriers? I ask, because I have a 3rd gen rear with 273s and swapping to a 6-speed.. and need to swap to 342 or higher so I dont burn out my clutch.. but dunno what I can do without completely swapping out the whole rear.
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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by Rob Petyo View Post
    Most people?

    Here is the thread and it seems to me that "most people" in your opinion is YOU!
    A gear swap doesn't effect gas milaege as much as one might think. Only people that add comments like yours are usually people that don't actually have 3:73s (auto) or 4:10s (manual) Like you.
    Last edited by INMY01TA; 07-07-2008 at 04:40 PM.

  13. #13
    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by Rob Petyo View Post
    Click for full size

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    Junior Member Rob Petyo's Avatar
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    Quote Originally Posted by INMY01TA View Post
    A gear swap doesn't effect gas milaege as much as one might think. Only people that add comments like yours are usually people that haven't actually swapped them.


    if you say so

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    Veteran Hi-Po's Avatar
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    Quote Originally Posted by Rob Petyo View Post
    Most people?

    Here is the thread and it seems to me that "most people" in your opinion is YOU!
    I suggest you do a "search" on the opinion. Again, I'm not saying your wrong. Its your car dude, but most people who have tried.... then re-tried.... then sometimes re-tired.... end up with somewhere along the lines of 3.73's and 4.10.

  16. #16
    Junior Member Rob Petyo's Avatar
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    look, I replied to the thread which asked which one to go with and said 3:42's. I had east coast supercharging do the swap along with the yank converter and AR headers and I like the change. I also have a lot of other things done to my car as well.

    I went from cruising down the highway @ 80 mph doing 1,800 rpm and now do the same speed and have added another 700 rpm's to the motor to cruise there. if I wanted better 1/4 mile times and all I did was track my car i'd probably go larger (3:73 - 3:90 - 4:10) but i drive mine everyday so, I like the feel (and economy) of 3:42's.

    I do regret not going with a higher stall converter but at the time I wanted to just touch 11's.

    tg580 - sorry about going off topic with your thread
    Last edited by Rob Petyo; 07-07-2008 at 05:33 PM.

  17. #17
    Veteran Hi-Po's Avatar
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    Pretty sure larger (lower) would hurt your 1/4 miles times ??

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