I've run an ARB air locker in the front pig of my 1997 F350 Ford Diesel sine 1998 with no issues what so ever but I run a Detroit Tru-Trak in the back pig. I engage the ARB using the air supplied by my on board compressor that supplies my air ride bags.
Like I said, never had an issue. I don't want an air locker in the back, tire wear becomes an issue and the Detroit senses wheel slip and locks and unlocks by itself as conditions warrant.
My only caution is, the pinion pre load must be set correctly by a competent shop and the ring must be checked for tooth engagement.
It's a good unit (ARB and TT).