Ditchdiggerjcf Posted May 7, 2020 Share Posted May 7, 2020 Anybody seen these? Any idea on the axle ratings? I like my trucks like my women, both with big rears. Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/ Share on other sites More sharing options...
tjc transport Posted May 7, 2020 Share Posted May 7, 2020 no pictures Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450654 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 8, 2020 Author Share Posted May 8, 2020 My bad, been a long day. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450658 Share on other sites More sharing options...
j hancock Posted May 8, 2020 Share Posted May 8, 2020 The identification will be stamped on the rear of the rear housing right side. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450659 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 8, 2020 Author Share Posted May 8, 2020 On a flat machined spot? Both rears the same thing? They are both the big cast axle housings. Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450664 Share on other sites More sharing options...
BGarofalo Posted May 8, 2020 Share Posted May 8, 2020 Wrong trunion stand and axle caps for anything 58k or larger. A solid beam was an option for all camelback suspensions. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450669 Share on other sites More sharing options...
j hancock Posted May 8, 2020 Share Posted May 8, 2020 On 5/8/2020 at 3:19 AM, Ditchdiggerjcf said: On a flat machined spot? Both rears the same thing? They are both the big cast axle housings. Expand . Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450671 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 8, 2020 Author Share Posted May 8, 2020 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. Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450676 Share on other sites More sharing options...
j hancock Posted May 8, 2020 Share Posted May 8, 2020 Stamped. Depending on rust, dirt, grease, the info may be difficult to read. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450677 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 8, 2020 Author Share Posted May 8, 2020 Ok. I will hit that spot hard with a wire wheel. Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450679 Share on other sites More sharing options...
JoeH Posted May 8, 2020 Share Posted May 8, 2020 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. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450687 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 8, 2020 Author Share Posted May 8, 2020 Trunnion crossmember edge rails? Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450691 Share on other sites More sharing options...
mrgumby Posted May 8, 2020 Share Posted May 8, 2020 Is there a vin stamped in the front of the frame. You can have mack run them for ya Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450692 Share on other sites More sharing options...
JoeH Posted May 8, 2020 Share Posted May 8, 2020 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. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450693 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 8, 2020 Author Share Posted May 8, 2020 That big piece is not there, just the trunnion stand. Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450715 Share on other sites More sharing options...
JoeH Posted May 8, 2020 Share Posted May 8, 2020 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? Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450717 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 9, 2020 Author Share Posted May 9, 2020 It doesn't seem to have what you are calling "eagle rails". Only has the trunnion stand. Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450789 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 10, 2020 Author Share Posted May 10, 2020 The cone shaped axle caps in the second pic all seem to be leaking on the ends. How can they leak there? Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450825 Share on other sites More sharing options...
JoeH Posted May 10, 2020 Share Posted May 10, 2020 Been a while since I've looked at cone type axle caps, I think the end is either pressed or welded in. The ends don't do much work. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450858 Share on other sites More sharing options...
theakerstwo Posted May 10, 2020 Share Posted May 10, 2020 On 5/8/2020 at 1:43 AM, Ditchdiggerjcf said: My bad, been a long day. Expand i have a trunion like that and can i use 44 springs on that trunion shaft? Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450861 Share on other sites More sharing options...
Ditchdiggerjcf Posted May 10, 2020 Author Share Posted May 10, 2020 On 5/10/2020 at 2:49 PM, JoeH said: Been a while since I've looked at cone type axle caps, I think the end is either pressed or welded in. The ends don't do much work. Expand If they were pressed in that would explain the leaks. Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450865 Share on other sites More sharing options...
terry Posted May 10, 2020 Share Posted May 10, 2020 On 5/10/2020 at 3:27 PM, theakerstwo said: i have a trunion like that and can i use 44 springs on that trunion shaft? Expand I am not sure if the trunnion height is the same between the spring and the solid walking beam trunnions. terry Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450891 Share on other sites More sharing options...
theakerstwo Posted May 10, 2020 Share Posted May 10, 2020 Yes thay are same height Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450903 Share on other sites More sharing options...
terry Posted May 11, 2020 Share Posted May 11, 2020 On 5/10/2020 at 11:31 PM, theakerstwo said: Yes thay are same height Expand As long as the bushing dimensions are the same then I would think they would interchange. terry Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450905 Share on other sites More sharing options...
Montone Posted May 11, 2020 Share Posted May 11, 2020 Looks like 44s not 56 or 65s with out the outer trunion flange. Quote Link to comment https://www.bigmacktrucks.com/topic/62433-big-rears/#findComment-450912 Share on other sites More sharing options...
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