have just fitted a disco axle to the front of my 89er,.......uprated it from 10 to 24 spline diff...... only thing you might have to be careful of is if you get a td5 axle make sure you get the radius arms with it......slightly wider than older ones and you could have problems with the axle "ears" that they fit in......worth changing the radius arm bushes whilst you are axle changing too......just make sure you get the correct ones for the arms.