The ARB is a great unit, and is plenty strong...but you may not need it depending on the type of off-roading you do...
For narly twisting trails where the likelyhood of you un-weighting one of the rear wheels is good, then a true locker may be for you...and that could be a selectable type locker(ARB, the factory E-Lock...) or a Detroit Locker or drop in locker("Lunchbox") such as the Sparton.
Any non-selectable locker does have it's drawbacks on the street...they are aggressive, noisy as they lock and unlock around corners, put excessive strain on the axles during street cornering, and do wear the rear tires much faster as they act like a spool when running down the hi-way...also the drop-in units tend not to be as strong as sometimes needed for a healthy V-8 and larger tires that see some hammering...
Good news?....Nothing to activate and there is ZERO slip between the axles when needed...and the Detroit Locker is very strong!
The ARB can give you the best of both worlds, locks only when you need it...BUT it is more expensive and complex then the TT...
The TT shines for the street, smooth, quiet and strong....no clutches to wear out....the only "Achilles Heal" is if one wheel leaves the ground, the torque(power) to the wheel with traction drops to about zero, leaving the wheel in the air to spin...NOW this can be overcome by a old technique where you supply a little brake to slow down the spinning wheel which the TT will then start applying torque to the wheel with traction..it won't be 100% of the torque like a locker but many times it can be enough to get you going...
Here's where the Titan electronics actually work with the TT...When one wheel starts to spin, ABS will apply brake pressure to just that one wheel, which is just what the TT needs to get going....you couldn't ask for two better systems to work together...
The TT is home with snow, sand, most mud and desert type off-roading....
Sorry for the long post...
