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linrick1

Front Axle Upgrade On 88 Rw613?

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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

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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.

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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

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