Originally Posted by denisl
Ok makes sense thanks for the clarification - didn't realize it went into 4wd mode without my input.
It won't lock front to rear without being in 4-Lo
Left to right is never locked in front.
It would probably be fine, but I think the advise is reasonable to keep all 4 matched (regardless of 4WD).
Same reason they advise 4 snows even on a FWD car.
You want the same traction/handling on all 4.