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373 gears

This is a discussion on 373 gears within the Drivetrain forums, part of the LSx Technical Help Section category; hey im planning on putting 373 gears on my car, do i need to do naything else besides just putting ...

  1. #1
    Member whiteLS1TA's Avatar
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    373 gears

    hey im planning on putting 373 gears on my car, do i need to do naything else besides just putting them in? do i need to change anything?

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    Impounded
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    Buy the install kit its really helpful but as long as you get series 3 carrier you should be fine.

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    Member whiteLS1TA's Avatar
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    Quote Originally Posted by 2000T/A Guru View Post
    Buy the install kit its really helpful but as long as you get series 3 carrier you should be fine.
    do you know if motive gears are good? whats a series 3 carrier? do you see a differenence?

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    Well when you buy it should say what carrier it is and i have heard motives are pretty quiet. which is good

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    JMAC Racing WS6ICK's Avatar
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    I bought the GM gears but Motive are made by GM. They make the least noise and are the best for your car. I also used the master install kit that came with everything. May as well change everything since your in there. Its pretty much an easy install. Just use the same shims on both sides of the carrier.

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    Senior Member clg82's Avatar
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    Quote Originally Posted by 2000taws6 View Post
    I bought the GM gears but Motive are made by GM. They make the least noise and are the best for your car. I also used the master install kit that came with everything. May as well change everything since your in there. Its pretty much an easy install. Just use the same shims on both sides of the carrier.
    Do you know where to find a step by step instructions on how to do this install, I also have a 2000 automatic and was looking at putting a gear in. I am not to mechanically inclined but I think I could do it with some simple instructions. And the best gear to go with is a 3.73 right? It is my daily driver. I also want to get the install done before I have it dynoed so they can tune the car to recognize the gear. Thanks for the help, Chris
    2000 Arctic White trans am, ws6 hood, ws6 air box, slp lid, slp smooth bellows, slp loudmouth exhaust,shift kit, rebuilt trans, LS6 intake, 3.73 gears, Shaner S3 p/p throttle body, and a tune . SFC. C6 ZO6 rims 18" in back 17" in front. Drilled and slotted rotors.

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    JMAC Racing WS6ICK's Avatar
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    Quote Originally Posted by clg82 View Post
    Do you know where to find a step by step instructions on how to do this install, I also have a 2000 automatic and was looking at putting a gear in. I am not to mechanically inclined but I think I could do it with some simple instructions. And the best gear to go with is a 3.73 right? It is my daily driver. I also want to get the install done before I have it dynoed so they can tune the car to recognize the gear. Thanks for the help, Chris
    I used this and its very helpful. I have never done gears either and I had no problems with these instructions. Just make sure you have the tools and a press is helpful on the bearings.

    http://www.keliente.com/gears1.htm

    Here is another Website that is helpful for other mods.
    http://www.bowlingss.com/LS1_How_To.htm

  8. #8
    Senior Member clg82's Avatar
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    Quote Originally Posted by 2000taws6 View Post
    I used this and its very helpful. I have never done gears either and I had no problems with these instructions. Just make sure you have the tools and a press is helpful on the bearings.

    http://www.keliente.com/gears1.htm

    Here is another Website that is helpful for other mods.
    http://www.bowlingss.com/LS1_How_To.htm
    Looks a little to complicated to me! How much you think it would cost to have a reputable mechanic put it in? Do you think this would hinder gas mileage?

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    JMAC Racing WS6ICK's Avatar
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    Not sure the cost, depends on the mechanic. Of course gas mileage will decline with lower gears. You wanna play, you gotta pay. But the launch with a stall converter is awesome.

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    Junior Member spokey07's Avatar
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    hey whitels1ta do you drive an a4 or m6? if ur an a4 then ya get the 3.73 otherwise get the 4.10's sounds like you drive an m6

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    Senior Member slims00ls1z28's Avatar
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    350-500 for GM gear installs usually. If you are not mechanically inclined and dont have the proper tools DONT install gears.

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    Senior Member clg82's Avatar
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    Quote Originally Posted by slims00ls1z28 View Post
    350-500 for GM gear installs usually. If you are not mechanically inclined and dont have the proper tools DONT install gears.
    350-500 bucks for the install ouch!!!! You think it's worth it?

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    Senior Member slims00ls1z28's Avatar
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    To have a trouble free/whine free many miles of fun out of them you bet. I had people offer to do it for like 250 but those are some of those redneck deals. I wouldn't trust a redneck deal on 2 things auto transmissions and GM rear ends , which is why I got a pro built trans and ford rear end .

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    Member whiteLS1TA's Avatar
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    Quote Originally Posted by spokey07 View Post
    hey whitels1ta do you drive an a4 or m6? if ur an a4 then ya get the 3.73 otherwise get the 4.10's sounds like you drive an m6
    i have an m6 i was thinking of getting the 4.10s but right not im using my car as daily driver so ima have to wait onthe 4.10s until iget a little commuter. i heard the 3.73's well do the job tho aleast for now!

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    Senior Member slims00ls1z28's Avatar
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    You won't see much if any difference with a M6 and 4.10's over the 3.73's in terms of gas mileage. Hell I got 4.10's in an Auto and it's nowhere near as bad as I expected going from a 2.73.Even with the stall I still am getting low 20's if I keep my foot out of it. But then again 90% of my drive is highway and When it goes into lockup 70 mph cruise is about 2700 rpms.

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    Member whiteLS1TA's Avatar
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    Quote Originally Posted by slims00ls1z28 View Post
    You won't see much if any difference with a M6 and 4.10's over the 3.73's in terms of gas mileage. Hell I got 4.10's in an Auto and it's nowhere near as bad as I expected going from a 2.73.Even with the stall I still am getting low 20's if I keep my foot out of it. But then again 90% of my drive is highway and When it goes into lockup 70 mph cruise is about 2700 rpms.
    hey do i need to get a hypertech computer chip or something to resest my settings on my car for the new gears i put in?

  17. #17
    Senior Member slims00ls1z28's Avatar
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    yep you will need it reprogrammed to get the speedo back right. It will still run right it just will read off.

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    Senior Member clg82's Avatar
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    Quote Originally Posted by slims00ls1z28 View Post
    You won't see much if any difference with a M6 and 4.10's over the 3.73's in terms of gas mileage. Hell I got 4.10's in an Auto and it's nowhere near as bad as I expected going from a 2.73.Even with the stall I still am getting low 20's if I keep my foot out of it. But then again 90% of my drive is highway and When it goes into lockup 70 mph cruise is about 2700 rpms.
    Do you suggest 3.73 for an A4 and will I notice a difference?

  19. #19
    Senior Member mrr23's Avatar
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    Quote Originally Posted by clg82 View Post
    Do you know where to find a step by step instructions on how to do this install, I also have a 2000 automatic and was looking at putting a gear in. I am not to mechanically inclined but I think I could do it with some simple instructions. And the best gear to go with is a 3.73 right? It is my daily driver. I also want to get the install done before I have it dynoed so they can tune the car to recognize the gear. Thanks for the help, Chris
    you will need a press and dial indicators to get you pinion depth and backlash set correctly. do you know what gears you have now? it will determine if you have a 2 series carrier (2.73-3.08) or 3 series carrier (3.23-3.73). here's a webpage i made on how to swap gears.

    http://www.stealthram.com/gearswap.htm

  20. #20
    Senior Member slims00ls1z28's Avatar
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    Quote Originally Posted by clg82 View Post
    Do you suggest 3.73 for an A4 and will I notice a difference?
    Yes and Yes. A4+3.73= match made in heaven.

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