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Thread: Needin new gears 3.42-3.73

  1. #1
    Join Date
    Aug 2009
    Location
    Oregon
    Posts
    5

    Needin new gears 3.42-3.73

    I love that I get 22.5 MPG driving from Kansas to Oregon. However, those days will soon be over and with my 33" Nittos I would like to upgrade to 3.73s. Can anyone recommend a good company to buy from and what all I would need to make it work. Finally, are those high speed diff covers worth the 400 bucks. What are they good for?

  2. #2
    Join Date
    May 2009
    Location
    Plainfield, IL
    Posts
    2,036
    go 4.10

    3.42-3.73 isn't a big enough step up (been there, done that)


    covers are meant to keep fluid a lil cooler/ keep you from busting them open on rocks. If you dont rock-crawl, save the money (unless you're just going for looks)

    I always fill my rears with lucas 80-90...have never had a problem.
    blown transmissions are about as useful as 97% of the guys on this forum

  3. #3
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    4.10 FTW with 33's.

  4. #4
    Join Date
    Dec 2008
    Location
    Keller, TX
    Posts
    40
    if you decide to go with 373s i have a stock set with 13,000 miles on them from my 2003 z71 front and rear.
    72 C10 5.3 4L60E

  5. #5
    Join Date
    Apr 2009
    Location
    42141
    Posts
    714
    i agree. go 4.10's i swapped from 3.42 to 3.73 its better but just isn't enough. and thats in a 2wd with stock 30.5" tires...
    Blessed be the Lord my strength which teacheth my hands to war, and my fingers to fight:
    Psalms 144:1

    Si vis pacem, para bellum

  6. #6
    Join Date
    Aug 2004
    Location
    Magnolia, TX
    Posts
    3,259
    what's your driving when you get back from the box???? city? highway? longhaul?

  7. #7
    Join Date
    Sep 2007
    Location
    San Antonio
    Posts
    194
    4.56's aaaaaaarrrrrrrrrgggggggg


    Let me tell you what Melba Toast is packing here allright............

  8. #8
    Join Date
    Aug 2009
    Location
    Needville, TX
    Posts
    7
    I just bought new gears for my truck and went with 4:10s from richmond gears!!!! plus i got me a Corvette servo...puttin them in this weekend!!!!! Go big or go home!!!!!

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