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What to look for when buying used 10 bolt?

This is a discussion on What to look for when buying used 10 bolt? within the Drivetrain forums, part of the LSx Technical Help Section category; I'm looking to pick up a 3.42 ten bolt for my 2.73 A4. Can anyone give me some pointers on ...

  1. #1
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    What to look for when buying used 10 bolt?

    I'm looking to pick up a 3.42 ten bolt for my 2.73 A4.

    Can anyone give me some pointers on what to look for when looking at a used axle?

    Also, is there a quick way to verify that it's actually a 3.42 rear?

    Thanks!

  2. #2
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    For starters,compatability with your existing 3 abs or 4 channel abs/tc system.

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    Sold: LS1 '85 El Camino ls1camino's Avatar
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    ^^^ What he said, but then again, I got rid of my ABS and TCS.

    On a related note...I just took my 10-bolt out of my car in favor of a 9".

    Pros:
    - Has a brand new set of 3.42 gears
    - No whine at any speed.

    Cons:
    - The axles are out because I took the backing plates off to put on my 9"
    - It doesn't have backing plates (you can take the ones off of yours and put them on this one),

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    These are the folks I just bought mine from;

    http://motors.shop.ebay.com/merchant/pick_a_part?_rdc=1

  5. #5
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    Thanks LS1 Camino, but I've actually already found one locally. It's a 4 channel, so it'll work with my ABS/TCS. Supposedly has less than 50k on it, and is already out of the car.

    I was just wondering if there's anything else I can check.

    Is there a tag on the cover with the ratio stamped in?

  6. #6
    Something Diabolical... chuckie669's Avatar
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    Do you know if it was from an auto or M6 car? They should know.

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    Senior Member bigrondownhiller's Avatar
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    Rotate the pinion and see how much play is in the gears. You can also rotate the pinion and count how many times the axles rotate compared to the pinion. If the pinion goes around about 3 and a half times to the axles 1 time then it is a 3.42.

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    Quote Originally Posted by bigrondownhiller View Post
    Rotate the pinion and see how much play is in the gears. You can also rotate the pinion and count how many times the axles rotate compared to the pinion. If the pinion goes around about 3 and a half times to the axles 1 time then it is a 3.42.
    How much play is acceptable here, if any at all?

    Thanks.

  9. #9
    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by StuntmanMike View Post
    What to look for when buying used 10 bolt?
    A 9"

  10. #10
    2 SS's are better than 1 Jays00ss's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    A 9"
    lol!!! I 2nd that
    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

  11. #11
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    Well, if someone wants to give me a couple of grand for a 9", sure, I'll buy one.

    Otherwise 150 for a ten bolt to get rid of my 2.73's suits me just fine.

    A stock ten bolt is perfectly acceptable for my application, a stock A4 that will see maybe 4 or 5 track days this year if I'm lucky.

  12. #12
    Veteran Hi-Po's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    A 9"
    That is EXACTLY what I was gonna say!

    Dont look into buying a 10 bolt is your best bet.

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