Dodge 9 1/4" axle question
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  1. #1
    Official RnS Addict chucks41's Avatar
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    Dodge 9 1/4" axle question

    I know nothing about axles, those & transmissions are black magic, works of the devil to me & I just cant get my head around them for some reason & the more I look on the web the more confused I get.
    My son's Dodge Lil Red Express has a 9 1/4" rear end (12 bolt) 56" back plate to back plate.


    It's supposed to be a sure grip (LSD) diff, but only spins up one wheel up. I thought if it was a friction plate type diff it could be knackered, so on Dave Billadeau's advice jacked it up & spun a wheel.
    Result wheels spun opposite, so it's had an open diff fitted at some time
    Can anyone point us in the right direction as to what diff would be best to replace the open unit fitted or where to source one.
    We don't really want to go a different type route (I've got a spare full width Ford 9" with LSD & Strange shafts). He wants to keep it stockish.
    As I said I don't know the difference between Sure grip, Power lock, should we just get the diff welded (locker?) etc. & I don't really want to pester Dave again (I'm always picking his brains).
    Cheers guys
    Ian
    Last edited by chucks41; 08-06-2011 at 21:17.
    Too much time on my hands. Too little money in my pocket

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    Official RnS Addict harris66's Avatar
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    you could try cannonball watts, he in chesire i think but he,s a transmission specialist and tends to have a variety of mopar axles and diffs in stock
    i want cubic inches! lots of em!!

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    i want cubic inches! lots of em!!

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    Is this on 5 or 8 stud wheels (or does anyone know whether the hubs can be interchanged) as I've got an 8 stud rear axle with an LSD from a W200 if that's the same. IIRC it's a Dana 60 axle. I'll compare the backplate with your pic tomorrow.

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    Official RnS Addict chucks41's Avatar
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    Quote Originally Posted by dodgeman View Post
    Is this on 5 or 8 stud wheels (or does anyone know whether the hubs can be interchanged) as I've got an 8 stud rear axle with an LSD from a W200 if that's the same. IIRC it's a Dana 60 axle. I'll compare the backplate with your pic tomorrow.
    Thanks dodgeman, The Dana 60 has a 10 bolt cover, whereas the 9.25" has the 12 bolt as per pic. I'll have to do some digging, the Dana 60 is a slightly stronger axle 9 3/4" diff, slightly larger halfshafts.
    Matt's truck has 5 stud hubs & runs ARE 5 spokes, I've also given him an old set of ARE slotmags with slicks that I had in the garage to use at the Mopars.
    Not sure what is required to swap hubs if possible.
    The truck is a Lil Red Express


    It is supposed to have 3.55:1 rear end (I think the W200 ran a 4.1ish rear).

    Not sure it's a straightforward swap but I would appreciate it if you could measure the overall width between the hub backplates.
    Thanks again
    Ian
    Too much time on my hands. Too little money in my pocket

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    After you said that you didn't think they were the same I thought I was going to avoid clambering under there.....Never mind I'll try and get a width measurement over the weekend, and just to be sure I'll count the bolts. The W200 had various ratios but I think you're on the money with 4.1:1 as I'm sure that's what it is.

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