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    Author Topic: How do I know what rear end I have?  (Read 900 times)

    Offline dfark

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    How do I know what rear end I have?
    « on: January 27, 2013 - 12:58:45 PM »
    My car is a 318 auto.    How can I tell what rear axle I have and what the ratio is.   I decoded the fender tag but there is nothing about it on there.   All I know is the third member has 10 bolts and the housing measured 3" in diameter.    The tire turns about 1.5 times to every 1 turn of the driveshaft.  What am I doing wrong here?    :dunno:
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    Offline HP_Cuda

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    Re: How do I know what rear end I have?
    « Reply #1 on: January 27, 2013 - 12:59:51 PM »

    It sounds like you have an 8 3/4 most likely with 2.76 gears as most 318s had.

    Pictures would help though.
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    Offline Jamiez

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    Re: How do I know what rear end I have?
    « Reply #2 on: January 27, 2013 - 01:04:07 PM »
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    Offline Super Blue 72

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    Re: How do I know what rear end I have?
    « Reply #3 on: January 27, 2013 - 01:11:42 PM »
    Nice link, Jamie!  :thumbsup:
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    Offline dfark

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    Re: How do I know what rear end I have?
    « Reply #4 on: January 27, 2013 - 02:02:20 PM »
    Great link.  Thank you.  Mine is 8 3/4. .  Cost effective to build this or put the money towards a dana 60? :feedback:
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    Offline Jamiez

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    Re: How do I know what rear end I have?
    « Reply #5 on: January 27, 2013 - 02:15:41 PM »
     I believe brads70 looked at the two options and a new Dana versus a built 8 3/4 came out about the same.
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    Offline BIGSHCLUNK

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    Re: How do I know what rear end I have?
    « Reply #6 on: January 27, 2013 - 02:27:46 PM »
     :iagree:  But I guess how far do you want to take it? Being 318 an all...  :dunno:
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    Offline dfark

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    Re: How do I know what rear end I have?
    « Reply #7 on: January 27, 2013 - 02:45:38 PM »
    The 318 is gone. It will be a big block 4 spd car.  Sorry i didnt mention that :dupe:
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    Offline MEK-Dangerfield

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    Re: How do I know what rear end I have?
    « Reply #8 on: January 27, 2013 - 03:15:54 PM »
    Well, unless you are going with a 500+ HP engine, the 8 3/4 will serve you well.

    Then again, if you are going to the drag strip often....
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    Mike

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    Offline Skunkworks Challenger

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    Re: How do I know what rear end I have?
    « Reply #9 on: January 27, 2013 - 03:39:34 PM »
    Is your 8 3/4 open or closed?  With that big block you wouldn't  have much traction if it is open.
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    The Brewmaster

    Offline Chryco Psycho

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    Re: How do I know what rear end I have?
    « Reply #10 on: January 27, 2013 - 03:52:11 PM »
    if only 1 tire is turning & you turn the driveshaft 1.5 turns for a full tir rotation then the ratio doubles so you mayhave a 2.90 gear ratio & you do not have a sure grip .
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