Well they are technically all freewheeling hubs, when you are not in 4wd they are "freewheeling" as they are not being driven. The d22 ones are just called manual freewheeling hubs because they are only engaged "manually."Manual front hubs? Them there's "freewheeling front hubs!"
Lots of boy racers with other 4x4's that don't have them, are busy installing them, at great cost, on their new, high tech 4x4's!
And yes, the manual says to lock the hubs now & again to lubricate the bits - no mention of driving in 4WD to do so.
I do it when I wash the car!
It will achieve the same outcome. The only thing to remember is to only move the lever to 4hi when stopped, as the front end is not turning over, it will be the same as trying to go between 4hi and 4lo while moving.There's an idea for D22 drivers. If you only need to turn the front diff over (and that is what the issue of locking the front hubs is about) then just engage 4WD without locking the front hubs. Stay in out of the rain and cold and still get the job done.
The good thing with "manual freewheeling hubs" is being able to engage 4lo without locking the hubs for slow maneuvering (especially with trailers) on any surface without creating transmission windup.
Oh the number of times I could have used this. I have thought about popping the front drive shaft off so I could have that too. Reversing my 2.5T caravan into my driveway for a start. I suspect people on boat ramps would have similar wishes.
It is mentioned in the D-22 manual that you NEVER select 4 x 4 drive without having the front hubs locked in position. you can drive with the front hubs locked in and no 4 x 4 selected but not that other way.
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