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3.73's in an a4 lower shift points?

This is a discussion on 3.73's in an a4 lower shift points? within the Drivetrain forums, part of the LSx Technical Help Section category; im going to put 3.73's in and i was just curious if anyone out there has them....does it lower ur ...

  1. #1
    The red dragon bpopham22's Avatar
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    2001 pontiac WS6

    3.73's in an a4 lower shift points?

    im going to put 3.73's in and i was just curious if anyone out there has them....does it lower ur shift points? instead of 1st at 40 mph will it be 25-30? id like to know all the shift points if anyone knows them

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    Exalted Cyclops 67CamaroRSSS's Avatar
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    2002 Z28 A4 NBM
    Sadly now demodded :(

    3.73's are the most common gear ratio upgrade in an A4 car. I don't remember if it changed the shift points as it's not my DD. I did it cuz it was a GU2 code (2.73). When I installed a 3400stall TC it didn't matter anyway. What it will affect most is your top end speed.

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    Veteran 0rion's Avatar
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    the short answer is yes....it'll lower your shift mph. I'd have to look at my tune to see exactly where I have mine set to shift but I believe it's low 20's vs 40ish for stock on the 1-2 shift at wot. I'm also shifting at 6500 rpm too though and I had to play with all those numbers quite a bit after the stall to get it to shift where I wanted it.

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    Member joedude02's Avatar
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    Victory Red
    2002 T/A WS6 A4

    when i had my 3.73's, i could ring out 1st to 35ish, 2nd to 75ish 3rd at near 135/140mph. shift points at 5900rpm

    this was with the stock converter

  5. #5
    Veteran 0rion's Avatar
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    Quote Originally Posted by joedude02 View Post
    when i had my 3.73's, i could ring out 1st to 35ish, 2nd to 75ish 3rd at near 135/140mph. shift points at 5900rpm

    this was with the stock converter
    there ya go...take his answer. I mainly just ballparked the mph and then used my rpm's to set my shift points.

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    Auto Painter RyanJM's Avatar
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    I swapped from the stock 3.23 to a 3.73 and it does lower your shift mph and top end speed but it's alot more fun to drive and I still get decent gas mileage. My car didn't come with 2.73's so you should notice a bigger difference than me. I still have the stock stall for now but set my shift points at 6100 rpm till I do the cam and get some new springs. My car runs about 2500rpm at 70.
    1998 Trans Am 85k miles.
    Bolt ons, MS3 113LSA cam, Circle D Stall, Tune, Modified WS6 style hood, Full Suspension, 6000k HID's, Clear Side Markers w/ Leds, Led 3rd Brake Light and 18" AR Staggered Killer Wheels w/ BFG KDW NT's.- Weekend Toy/DD
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    Retired NOT tired SteveC's Avatar
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    2001 Z28 (Sara)

    I went from 3.23's to 3.73's, and can say the biggest difference will be when you replace your stock TC with a performance unit.

    SteveC

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