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all needed to change to 3.73 gears

This is a discussion on all needed to change to 3.73 gears within the Drivetrain forums, part of the LSx Technical Help Section category; I have an automatic transmission with a 2.73 gearing. what all is needed to change to a 3.73. I bought ...

  1. #1
    let the F-Bodies roll jimmybling31's Avatar
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    all needed to change to 3.73 gears

    I have an automatic transmission with a 2.73 gearing. what all is needed to change to a 3.73. I bought this off of texas speed

    http://www.texas-speed.com/shop/item...mid=54&catid=6

    I got it with 3.73 gears. is there anything else that I would need to get to change it over to 3.73. if so I will go ahead and order it tonight when I make an order on summit for something else.

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    Just a slow Camaro KING Z28 HAWK's Avatar
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    I was wondering the same thing. Come on guys we need info.

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    just make sure your carrier is the right series, i believe it is 2 or 3 series

    those gears should be for a 3 series i believe
    texas speed should be able to help you out with a positive answer

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    You need a thick gear set for a series 2 carrier. You might better call Jon at TSP and make sure thats what you are getting because if not you will have to buy a series 3 carrier to make it work. Jegs sells a thick gear that is made to work with your series 2 carrier. It will also last longer because the gears are stronger.
    TSP 347 SB, TSP Stage 2.5 PRC LS6, TSP MS4, Performabuilt Stage 2 4L60E, Yank PT4000, 4.11s, Fast 90/90, FTRA Cold air intake+all the free mods, Dynatech Supermaxx Exaust System, DMH Cutouts, Hooker Catback/FTRA Tips. Tuned by RPM/Garner NC. 11.28@119

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    let the F-Bodies roll jimmybling31's Avatar
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    I ordered a modified eaton lsd (3 series) to use. I read up on it before I bought it. it was 610 dollars and build to handle 475hp. from what I read it would be strong enough to stand up to the beating I will put on it.

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    Member jcws6's Avatar
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    That kit looks like pretty much everything you'll need.

    Do you plan on doing it yourself? If so, I'd recommend some loctite & RTV.

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    let the F-Bodies roll jimmybling31's Avatar
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    Quote Originally Posted by jcws6 View Post
    That kit looks like pretty much everything you'll need.

    Do you plan on doing it yourself? If so, I'd recommend some loctite & RTV.
    I was going to if all I was doing was the gears, but I needed the differential so I am taking it somewhere.

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    Member jcws6's Avatar
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    I think you're making the right decision by taking it to a shop, but it would be the same amount of work whether you're just swapping gears or replacing a differential too. The ring bolts to the differential, so you'd have to take it out anyway. However, the job is a huge pain in the ass if you've never done it before, and a couple specialized tools are needed. Just make sure the place you take it to specializes in drivetrains/rear ends. It's pretty precise work, so there's something to be said about getting a quality job done.

    Out of curiosity, I looked up the Ratech install kit they include. Here's a part list: pinion shims, carrier shims, crush sleeve, pinion seal, pinion nut, ring gear bolts, cover gasket, and pinion, carrier bearings.

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    let the F-Bodies roll jimmybling31's Avatar
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    Quote Originally Posted by jcws6 View Post
    I think you're making the right decision by taking it to a shop, but it would be the same amount of work whether you're just swapping gears or replacing a differential too. The ring bolts to the differential, so you'd have to take it out anyway. However, the job is a huge pain in the ass if you've never done it before, and a couple specialized tools are needed. Just make sure the place you take it to specializes in drivetrains/rear ends. It's pretty precise work, so there's something to be said about getting a quality job done.

    Out of curiosity, I looked up the Ratech install kit they include. Here's a part list: pinion shims, carrier shims, crush sleeve, pinion seal, pinion nut, ring gear bolts, cover gasket, and pinion, carrier bearings.
    wow that's alot of stuff it comes with. I was wondering too but have been too busy to check. I have never done it before, but if it weren't all new stuff going in it I wouldn't feel weird trying it.

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