JKuhl Posted June 29, 2015 Share Posted June 29, 2015 Hi guys first time poster,I just picked up a complete 88 RD parts truck, 4valve E6 350, 8ll, 44k 4.17 Mack cast rears on a Hendrickson spring ride. Both rear diffs are semi recent RE-Mack exchanges.I've got an 01 glider that was built from an 81 RD with a 285, 8ll (originally a 2 stick 5 spd), 44k 4.17 cast rears on a camelback.My question is this: My rears have the 2 piece axle assemble(axle shaft with the hub mounted cover) and the donor truck has the one piece axles. I've read about course and fine spline axles, I'm assuming that is the difference between the two. Can I swap the rears and axle shafts or are the hubs different between the two?The reason I'm interested in the swap is both parts truck rears are recent remains whereas mine are whom knows how old. Also the parts truck has an air inter axle lock which also would be nice. Thanks,Jim Quote Link to comment https://www.bigmacktrucks.com/topic/40691-rear-diff-swap/ Share on other sites More sharing options...
theakerstwo Posted June 29, 2015 Share Posted June 29, 2015 Does the top torque arm bolt on the carrier same way on both? Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/40691-rear-diff-swap/#findComment-294977 Share on other sites More sharing options...
JKuhl Posted June 29, 2015 Author Share Posted June 29, 2015 Yes, they both are single stud type. Quote Link to comment https://www.bigmacktrucks.com/topic/40691-rear-diff-swap/#findComment-294987 Share on other sites More sharing options...
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