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I have a 03 6 liter and the ESOF does not work. The previous owner said he always manually locked the hubs. I diagnosed the problem to the drivers front hub. It will not hold vaccum, the other side does hold vaccum. I replaced the front O ring and the drivers side still will not hold vaccum. I assume there is a rear O ring, but I have no idea of how to access this seal.
Can anyone point me in the right direction to fix my ESOF Please. I found nothing on youtube for the rear seal....unless I need a new hub or there is something I"m not informed about regarding the hubs and/or ESOF.