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Rear Gears.

This is a discussion on Rear Gears. within the Computer & Tuning forums, part of the LSx Technical Help Section category; I seen a post for 3.73 im 02 t/a bone stock ls1 A4 if i was to go to the ...

  1. #1
    Member ls1speedster's Avatar
    Join Date
    Apr 2007
    Bethany, IL

    2002 trans am

    Rear Gears.

    I seen a post for 3.73

    im 02 t/a bone stock ls1 A4

    if i was to go to the 3.90 gear or the 4.10 gear...
    - im taching 2100 at 80 how much would gears raise the rpm..

    - how much would top speed suffer...not realy worried tho...

    - what would the shift points do since with stock 2.73 it shifts about 5.900 would everything be fine there or would they have to get moved...

    - how much would gas milage suffer

    im thinking gears after i get a slp lid which is on order..
    any help would be appreciated...

  2. #2
    Join Date
    Jun 2007
    loyall ky

    black, and black
    04 M6


    hey try this site shoudl answer all your questions

  3. #3
    Veteran 0rion's Avatar
    Join Date
    Aug 2005

    98 Formula
    06 duramax

    Personally I would stick with 3.73' unless you're building a track car. The pcm won't like those 4.10's. My buddy runs 3.90's in his a4 vette without a problem but he also can't hook the car at all on the street.

  4. #4
    JMAC Racing WS6ICK's Avatar
    Join Date
    Aug 2005

    2000 Trans Am WS6 LS6
    2006 GTO LS2

    I have a 2000 TA, WS6,A4 and I installed 3.73 gears. I run about 2500 rpm's at 75 mph. The 3.73 gears works well at the track and works well if yours is a daily driver. I would stick with the 3.73's.

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