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do I REALLY have a 2 series Carrier?

This is a discussion on do I REALLY have a 2 series Carrier? within the Drivetrain forums, part of the LSx Technical Help Section category; I pulled off the diff cover at work yesterday and was going to start my gear swap/overhaul, but before I ...

  1. #1
    Ricekiller z28punk's Avatar
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    do I REALLY have a 2 series Carrier?

    I pulled off the diff cover at work yesterday and was going to start my gear swap/overhaul, but before I took the carrier out I noticed the pinion gear that was installed was a lot larger than the 3.73's I was going to swap in. I know my car has 2.73 gears because I have seen the build sheet and the car cruises at 1500 RPM's between 60 and 70 mph.

    I also emailed ws6store.com (Very Helpful and quick responses BTW) and verified the part number. I have the correct gears for a 2 series carrier.

    so does this sound like I have the right gears?

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    The new ring gear should be a lot thicker than your stock one. The higher numerical ratio moves the ring gear teeth closer to the pinion as it is smaller in diameter. A 3-series carrier would have different backspacing to make up for this offset, so a thicker gear is not required. Sounds like they got it right for a 2-series carrier.

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    Ricekiller z28punk's Avatar
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    ok thanks. it just threw me off by the big size difference. I knew going from 2.73 gears to 3.73's would be a big difference, but not this big.

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    You can take a rough measurement to check it. Pinion centerline to face of carrier (back of ring gear) should be identical on both sets. Lay your new ring gear on a flat surface and have someone hold the pinion gear horizontal to it with the teeth engaged so you can take a measurement of the new set.

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    Ricekiller z28punk's Avatar
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    ok i'll be checking all this monday on my day off.

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    for reference




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    ^^ Good info. Thanks for posting it.

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    Veteran Hi-Po's Avatar
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    Its been in the sticky up top the whole time also

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    might as well throw this picture in here from the same sticky


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    Quote Originally Posted by Hi-Po View Post
    Its been in the sticky up top the whole time also

    My bad... didn't even think to look up there.

  11. #11
    Ricekiller z28punk's Avatar
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    sorry. I was in a hurry. I thought this cant be the first time someone asked this question

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    Ricekiller z28punk's Avatar
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    ok so I got the gears installed and I am extremely happy. I am still only at 2200 rpms at what I think is 65 mph (no tune to fix the speedo yet). I am thinking I should have went with 4.10's, but o well I am still happy. the ring gear was MUCH thicker to make up for the difference in pinion gear size like stated above.

    thanks for all the help.

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    2.73 upgrade to 3.73 is the general consensus recommended gear mod. ENJOY !

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    Ricekiller z28punk's Avatar
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    I love the added kick in the ass. I cant wait to see what its like after I get the built transmission tuned and get the speedo corrected. I can tell its having problems figuring out what to do since the speed is off.

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