bigaboss Posted October 10, 2011 Share Posted October 10, 2011 This is my rear differentionl for the old dog. Would it have been original? What is it? It has a bir bore 280 Cummins. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/20974-rear-diff-of-my-mack/ Share on other sites More sharing options...
bigaboss Posted October 16, 2011 Author Share Posted October 16, 2011 Come on smart guys- Is this a "U-200"???? Quote Link to comment https://www.bigmacktrucks.com/topic/20974-rear-diff-of-my-mack/#findComment-88632 Share on other sites More sharing options...
rhasler Posted October 16, 2011 Share Posted October 16, 2011 Need more/better pictures. The pinion housing in the first picture looks like it belongs to a Mack. Look for an 11KB number stamped on the differential. Quote "Mebbe I'm too ugly and stupid to give up!" Link to comment https://www.bigmacktrucks.com/topic/20974-rear-diff-of-my-mack/#findComment-88633 Share on other sites More sharing options...
theakerstwo Posted October 16, 2011 Share Posted October 16, 2011 That was used on B models as well as some R models. Also the R model used a single top loader. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/20974-rear-diff-of-my-mack/#findComment-88641 Share on other sites More sharing options...
Maddog13407 Posted October 16, 2011 Share Posted October 16, 2011 that rear end is most likely original. seen many r models and u models with that cheap housing. it is deffinately a Mack hogs head. never seen a cheap rear end housin like that on a b model just u and r models. mack seemed to use that housin a lot in the 70's and put their hogs head in it and their spoke wheels on it. the reason i say cheap is almost everyone i have came across was broke around the spring perches on the housing and letting water in.i believe it may be a Rockwell housin thanks, Matt Quote Link to comment https://www.bigmacktrucks.com/topic/20974-rear-diff-of-my-mack/#findComment-88644 Share on other sites More sharing options...
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