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8 hours ago, Ditchdiggerjcf said:

On a flat machined spot? Both rears the same thing? They are both the big cast axle housings.

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Unit Identification.jpg

Jim

It doesn't cost anything to pay attention.

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So the rating is on a metal tag or stamped into the housing? If it is a metal tag, they are long gone.

 

On a side note, I have several 10.00-20 tires and rims I am going to chunk unless somebody wants them.

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My best guess is 44k.  6 spoke hubs rule out 38k I do believe, unless 38s on 24.5's require 6 spokes, and the trunnion crossmember is lacking the eagle rails that make it a triple frame for 6 ft or so for 55k+ setups.

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This truck has 55k springs on 58k rears.

The "Eagle" is a third inner rail that functions as a gusset to stiffen the trunnion.  It's a double frame truck, with two 3/8" rails for a total of 3/4 steel, excluding the Eagle. Also note that the trunnion stands bolt to the outside of the rails.

KIMG0219.JPG

KIMG0220.JPG

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Edit: 3/4" steel per side, so 1.5" of frame thickness left and right.

Not sure which "big piece" you're talking about, the solid beam instead of springs?

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5 hours ago, theakerstwo said:

i have a trunion like that and can i use 44 springs on that trunion shaft?

 

 

 

I am not sure if the trunnion height is the same between the spring and the solid walking beam trunnions.    terry:MackLogo:

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1 hour ago, theakerstwo said:

Yes thay are same height 

As long as the bushing dimensions are the same then I would think they would interchange.   terry:MackLogo:

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