Many thanks for the info! I downloaded the Service Manual for my transmission which contains most of the info I needed. Incidently the two compartments of the trans shares the same grease so I only have to check the front plug for the correct grease level after the initial application of grease to the overdrive unit. I too have a flip switch on the dash to activate the overdrive unit. Dropped my RPMS from 3500 to 2500 for 65mph with a 390 ratio rearend. I love the unit!
