I know the design work that goes into such items, and I know they are not "massively" over-engineered despite what common misconceptions there are flying around. Shifting the lever is nothing like shifting the gear lever and although the mechanism for locking/unlocking the viscous coupling may be perfectly happy to be moved, the transmission of all the torque through one end of the driveline was never invisaged OR designed for. And whats more the failure of several that I know of that were used for only a matter of weeks in the 2wd mode and thats in the UK alone leads me to believe this is the case.
You take the risk if you think you know more than the Toyota design team, who will have specified that it should not be used in those circumstances. But for the sake of my transmission I wont be so presumtuous despite (or, maybe, because) mech eng being my career
You take the risk if you think you know more than the Toyota design team, who will have specified that it should not be used in those circumstances. But for the sake of my transmission I wont be so presumtuous despite (or, maybe, because) mech eng being my career