My truck currently has Eaton ds38 rear ends with 3.70 gears but I’m in the process of working out the details to swap my air ride for a walking beam setup that has Eaton 401 rears installed. They have 4.33 gears which won’t work for me, but I’m curious what are the chances I can swap my 3rd members into the walking beam housings?
Eaton rear end gear swap
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Dirt101, Nov 24, 2021.
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Oxbow Thanks this.
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Oxbow Thanks this.
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I did attempt to dig this information up, and I believe the axle shaft splines are different but I was okay with transferring my 3rd member and shafts together. I believe I’ve got an extra gasket laying around so I will try to check the axle end bolt pattern tomorrow. Thanks!
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Me and my buddy just swapped my 38s over to 40s was a direct swap, axles worked. So doing the opposite may work also.
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