linrick1 Posted September 25, 2005 Share Posted September 25, 2005 Hello to all. We have an '88 RW613 that has a 12K front axle and I was wondering how difficult it would be to swap in a 14-6 front axle. Am I going to have to change the shackles, hangers, steering linkage, etc. or is it a fairly straightforward swap? Thanks, Rick Quote Link to comment https://www.bigmacktrucks.com/topic/397-front-axle-upgrade-on-88-rw613/ Share on other sites More sharing options...
rick harper Posted September 26, 2005 Share Posted September 26, 2005 a mack faw5371, 12k front axle and a faw14.3, 14.3k front axle are the same except mack will shotpeen the axle to get the rating up to 14.3. kingpins, steering box, spindles, should swap over. brakes are still 15x4 or 16.5x5. basically the only difference is the spring rating of the front springs. from the factory 16.5x5 brakes are standard equipment. Quote Link to comment https://www.bigmacktrucks.com/topic/397-front-axle-upgrade-on-88-rw613/#findComment-1774 Share on other sites More sharing options...
linrick1 Posted September 26, 2005 Author Share Posted September 26, 2005 a mack faw5371, 12k front axle and a faw14.3, 14.3k front axle are the same except mack will shotpeen the axle to get the rating up to 14.3. kingpins, steering box, spindles, should swap over. brakes are still 15x4 or 16.5x5. basically the only difference is the spring rating of the front springs. from the factory 16.5x5 brakes are standard equipment.←Hi Rick, Thanks for helping me out with this, just to clarify can I use the same steering box, pittman arm, drag link, spring hangers, shock mounts and shocks? I guess what I'm asking is can I just get a 14-6 FA and springs and bolt it right up? Thanks again, Rick Quote Link to comment https://www.bigmacktrucks.com/topic/397-front-axle-upgrade-on-88-rw613/#findComment-1779 Share on other sites More sharing options...
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