New guy here. I've noticed some good references to Schaeffer's #267 gear oil. Will that oil work good in a 1978 NP435/205 trans/transfer case combo as well as in the 60 series differenctials at each end of the pick-up? Also have a 1972 Courier (re-badged Mazda) with a 1983 Mazda 5-spd, will that...