Tuesday, Mar 29, 2005 at 22:23
Not quite true Bob. If you drive a "full time" 4WD like an 80s cruiser or prado, then yes, they drive around all day in 4WD because they have some kind of release mechanism, usually a viscous coupling or similar, to let the front diff turn endependantly from the rear diff. This can be "locked in" when serious 4WDriving.
Old forby's like 60s cruisers, or even the new GU patrol, that have "part time' 4WD do not have any release between front and rear diffs when locked in 4WD, and serious damage can occur in the transfer case if driven on bitumen. Even a short drive on bitumen can cause "wind up" in the transfer case.
I did a U turn on bitumen with the car in 4WD. The car came to a stop as if someone pulled on the hand brake, and it wouldn't disconnect out of 4WD or move forward or backwards. I had to jack up one wheel and fart around to disconnect the free wheel hubs before I could go anywhere.
It wasn't pleasant, firstly because I thought I had buggered the transfer case, but also it started raining and I was smack in the middle of one of
perth's more "unpleasant" suburbs.
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