Techs? Wondering if antilock is tied in with the 4x4low or high, or the Allison. The brakes seem strong enough, but I can't lock them up in 4x4low while in gear. Thought it might be a safety thing to prevent the wheels locking up in grade breaking mode. Just wondering, use to it now. thanx geo.

I found the same thing to be true,my guess is the abs system wont aloow it-

Tried the brakes in 4x4 low, on a good traction flat surface they lock- up no problem. On an ice uphill they wouldn't. Wierd. Any clues? thanx geo.