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Rear End Gears

This is a discussion on Rear End Gears within the Drivetrain forums, part of the LSx Technical Help Section category; I currently have a 3:23:1 gear and am looking to get either a 3:73:1 or a 4:10:1. Can anybody reccomend ...

  1. #1
    Member TopForm11's Avatar
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    Rear End Gears

    I currently have a 3:23:1 gear and am looking to get either a 3:73:1 or a 4:10:1. Can anybody reccomend anything and if I do change the gear from the stock will it make my spedo and odometer be innaccurate?

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    King 0f n00bz shady milkman's Avatar
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    do you have a manual if so get 4.10. if you have a auto then 3.73 your speedo will be thrown off so you'll have to adjust it with a hand held.

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    Member TopForm11's Avatar
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    will the spedo be going faster or slower than wat I am really going???

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    Quote Originally Posted by TopForm11 View Post
    will the spedo be going faster or slower than wat I am really going???
    If the speedo says you are doing 65MPH, you will actually be going slower than that if you get 3:73s or 4:10s.
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    Senior Member slims00ls1z28's Avatar
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    I went from 2.73 to 4.10's in an atuo. Loving it BTW. My speedometer reads 118 at fuel cut-off however the GPS system shows I'm actually going 77 MPH when the speedo reads 118. 50 MPH on my speedo is actually 31 MPH so thats an Idea of how much it will be off but with your 3.23's your's shouldn't be off that much. I love the 4.10's behind an auto. 1st gear is a MF. cruising at 75 MPH with my 17 inch rims my tach reads about 2800.

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    Member TopForm11's Avatar
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    do you roll through 1st gear real quick...i dont want to lose 1st gear with too tall of a gear.

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    The Bandit Wesman's Avatar
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    I would reccommend 3.73's for an automatic.

    4.10's are better for the 6 speeds, since we have taller gears and 2 overdrives

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    Is there some bad reason why people choose 373s over 410s for autos?? Or is it preference?

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    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by daveb91 View Post
    Is there some bad reason why people choose 373s over 410s for autos?? Or is it preference?
    because of the gearing..3.73s give you the same performance for the 4l60e as the 4.10s for the t-56

  10. #10
    Member Bandit1's Avatar
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    does anyone kno the difference between motive gears and strange? how come the strange gears r $35 more. i wanna get 373's and dont kno which brand to go with. thanx

  11. #11
    King 0f n00bz shady milkman's Avatar
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    honestly the best gears are from gm performance...they are factory and i have heard that they never whine when installed.

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    Member Bandit1's Avatar
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    theres a kit from thunder racing comes with everything for 400 bucks seals, gears, gear oil, bearings, and a new cover. gm gets theres gears from motive or vise versa? ill just get the motives than?

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