Differential models

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Leftlanemilktrain, Aug 4, 2020.

  1. spsauerland

    spsauerland Road Train Member

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    Me too.
     
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  3. midcon

    midcon Light Load Member

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    Apr 11, 2020
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    Bringing this one back…. I have ds404 in my truck and want to swap out the front diff for a dsp40 with a locker. Same gear ratio

    Will that be a direct bolt in? Would I need new axle shafts if so? Thanks!


     
  4. bjytech

    bjytech Light Load Member

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    Ohio
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    DS404 and DSP40 are interchangeable. Some housings had 4 long bolts, 2 on the top, and 2 on the bottom, other housings had all short bolts. so depending on which housings you have and swap to you may need a couple bolts but that is all.
     
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  5. midcon

    midcon Light Load Member

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    Apr 11, 2020
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    Many thanks. I’ve talked to 2 shops and couldn’t get a clear answer from either.


     
  6. lester

    lester Midwest's #1 Feed Hauler

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    I know when I swapped my rear rear for a locker I had to get one different axle shaft. Has a longer splined section for the locking mechanism
     
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  7. dirthaller

    dirthaller Heavy Load Member

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    Coloratah
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    I had to “notch” the housing to accept the solenoid that runs the locker. Be careful not to color outside the lines if you don’t want it to leak. It’s been a dozen years since I’ve done it and yes you will need the solenoid side axle shaft that has longer splines.
     
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  8. lester

    lester Midwest's #1 Feed Hauler

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    Why the locker in the front rather than the rear? Or do you just happen to have a front with locker laying around?
     
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