Offroad-Express

I dont thing my hubs are disengageing, the lighs on the dash show front wheels still engaged (flashing), must have reversed a mile.

Any ideas

Flashing front light means your front diff is not disengaging. you hubs are solid drive.

on you air box there are two black solanoudes with a coulor dot on them unplus the the yellow doted one then replug back in,

if this fixes the prob then you cotract are dirty, ( you have been crossingg deep muddy water ).

i have replaced these many times over now. also get under you front diff, there is a actotrator which engages the diff you will find over time this fill up with crapp too.

i run my truck with these unpluged now.
but the truck does not run on the road offen

Jono

As Jono said you don't have auto hubs so reversing won't do any good.

The other option is to swap air lines over instead of replacing the solinoid. there are 2 electric over air solinoids by the air box, one to lock it and the other to unlock. Swap the lines over (the ones heading down to the diff, not the ones coming from the brake booster)

NJ