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What gears does mine take?

This is a discussion on What gears does mine take? within the Drivetrain forums, part of the LSx Technical Help Section category; I want to get a 3.73 gear for my 2000 auto trans am. What size gear will I need 7.5 ...

  1. #1
    Senior Member clg82's Avatar
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    2000 Trans Am

    What gears does mine take?

    I want to get a 3.73 gear for my 2000 auto trans am. What size gear will I need 7.5 or 8.5....it already has the 3.23 performance axle if that helps any. I am about to purchase new gears and don't want to get the wrong size. And what size should I go with? And what brands are good and strong, and where can I buy them. 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.

  2. #2
    Senior Member clg82's Avatar
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    2000 Trans Am

    Need some help here

  3. #3
    Member stephen02ws6's Avatar
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    red with black stripes
    2002 Trans Am WS6

    They are the 7.5" 10 bolt. As far as the brand I have Richmand. I havent beat on them too much yet so dont know about quality. They are a little noisy but the guy that installed them said that all the Richmand gears he has installed made noise. Dont know if it is true or not but the size is right.

  4. #4
    Member ls1speedster's Avatar
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    black
    2002 trans am

    so it the 7.5 for auto as well
    have the 2.73 would like to advance to 3.90

    thanks

  5. #5
    Member stephen02ws6's Avatar
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    red with black stripes
    2002 Trans Am WS6

    It is 7.5 for auto and manual I believe. I have auto and it was 7.5.

  6. #6
    Senior Member Tyler_LS1's Avatar
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    Pewter
    1999 Camaro SS-M6 #1775

    its a 7.5 for both
    1999 Camaro SS/ Pewter/ #1775 - LS1 6-speed - Predator 3 Custom Tune - Pro 5.0 - LS7 Clutch - 3.90's - Koni's - Strano Springs and Sway Bars - SFC's - Full UMI Chassis and Suspension - LS6 Intake PnP TB - ARH LT's and Kitty Ran Away - Magnaflow.

    12.6 at 112

    http://www.fquick.com/Tyler_LS1

  7. #7
    Member ls1speedster's Avatar
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    black
    2002 trans am

    thank you

  8. #8
    Jiuce it 'till it pings!! 97LTWON's Avatar
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    Midight blue
    1999 Z28

    Hello there. 7.5 is correct. The old corporate 10 bolt is the 8.5 in ring gear. Not all auto's have 2:73's. If your car was ordered with the performance axle and auto,the axle ratio is 3:23,all other auto's are 2:73 standard. ALL 6 SPEED F-bodies received the 3:42. And in 1999, ALL V8's received the better torsen-zexel limited slip rear end. IF your car has the 2:73 ring and pinion and you want to go to a numerically higher ratio than 3:23 you WILL need to get a different carrier. The 2:73 carrier WILL NOT accept a ring gear bigger (numerically higher) than a 3:23. I know this from experience. I had a 97 LT1 with the standard 2:73 gears and couldnt use the carrier for the 3:73's.
    Good luck. The top speed is cool with the 2:73's
    BTW, the richmond gear set is not the best, they do whine even if installed correctly. The motive gear set is the best IMO, and use the GM dif additive. Best combo hands down. Best of all, most GM dealerships sell everything you need. The gearset, install kit, and the additive. And you can tell them you work for Joe Blo's shop and most of the time they will give you 25% without even asking you for a tax ID #!
    Hope this helps you out before you dig in.

  9. #9
    Senior Member splitfinger09's Avatar
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    Bright Rally Red
    2000 Camaro SS #5075 M6

    Where can you buy US Gear?

  10. #10
    1 01ls1ws6's Avatar
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    pewter
    01 ws6

    I have richmond 3.73 in my nova, not a bad gear I have pounded on that car alot. But yes they are noisy

  11. #11
    2 SS's are better than 1 Jays00ss's Avatar
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    00 SS / 71 SS Elcamino

    I had motive performance in my 10 bolt, I now have them in my 9" as well. I would recomend them.

    I would save your money on the gear swap and just get a new rear end the 10 bolt is a piece of crap. For the $500-600 you will spend swapping gears you'll be on your way to a new 9". Luckily I recouped my money out of my 10 bolt, you might not be so lucky.
    Last edited by Jays00ss; 11-10-2007 at 10:22 AM.
    2000 SS Camaro Heads, Large cam, Fast 90, 9"w/430's and locker, yada yada yada... you get the picture

    1971 SS ElCamino 402 Big Block 550HP

    2006 Silverado 2500HD 496 cubic inches of pure muscle

  12. #12
    11 Second Club 11.34 bigboykilroy's Avatar
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    Red
    1998 Firebird Trans AM

    I have Motive 3.90's in my 98 Auto, LOVE THEM they got me into 12.98

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