Compression Ignition Addict
Join Date: Oct 2011
Location: Chico, California
Thanked 250 Times in 241 Posts
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the system is called ESOF or electronic switch on the fly.
their is vacuum lines that run to the hubs that engage them.
check these lines they often get dry rotted and wont hold pressure to engage the hubs.
and yes you can lock them at the hubs.
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99.5 f250 7.3 4x4 261k FF 160/30, PHP Hydra, S&B CAI, 4" TBE, Van Turbo with Turbo Blanket, RR Billet Wheel, Autometer Gauges, Transgo Tugger, Non-Ebpv Pedestal, 08 Tow Mirrors, Trucool.
Dad-2000 F250 7.3 4x4 111k Autometer Gauges, Superchips 1705 (Tow Safe), 6637, 4" TBE, BD Billet Wheel, Trucool.