After rebuilding the rear end (stock, not Ruckstell), I understand the finger tip test for the level of new 600 Wt.
I need to know how much to order from Lang's.
One quart, or two?
1 quart of 600W is plenty to have on hand for complete lube.
The later housings have the oil fill below center, as the Ford only needs to be filled to the bottom third of the pumpkin.
Best to pour (or push if you have a suction gun) some in at a time and check, the level should just be below the oil fill on the later rear axles.
Little pinkie first knuckle depth away from the brim of the oil fill opening.
Lang's carries a product called Lubriplate APG-90; this is in the catalogue in the rear axle section.
Is this product correct for the standard (non-Ruckstell) axle?
Don't think so for me, just plain ole 600W at $9 a quart.
Your local auto parts store will have some 85-140 combo for $9, but I like the heavier 600W, but that's me.
Thanks again, Dan.
NAPA doesn't carry 600W in Memphis.
Dan, where do you get your 600W? If the bottle has a SKU number, please let me know it.
I agree Dan, the 600W was designed for these anyway, and not that expensive. I always have an extra bottle on hand.
Didn't mean to infer local shops carry 600W, sorry. Get the 600W from Model T or Model A parts vendors.
Local shops carry substitutes like 85w-140w, but I would trust 600W better for Ford rear axle, that is what is called for.
I use the 85w-140w in my Ruckstell as the special bearings in them need this lube, 600W being too thick.