The L/S is in, valvoline part synthetic 80/90 gear oil, no friction modifier. I
spoke directly with the valvoline tech who stated in a typical gear oil change in my application there are 4 oz of friction modifier already added to their oil so none is needed. So far, absolutely no chatter though everything feels tight like a slight loss of power. I'm guessing that will lessen with use. Only 22 miles so far but I can feel a difference pulling out in my stone driveway and in gravel situations. BTW, the valvoline was only $ 4.50 a quart ( liter ? ) while the Coastal brand, a generic I think, was a buck more. No idea why. Ford full synthetic was $ 16.00 a quart. I paid a guy $ 95 for the installation which sounded really reasonable especially since he put new carrier bearings in.
Anyway, thought some of the guys might be interested in this info.
spoke directly with the valvoline tech who stated in a typical gear oil change in my application there are 4 oz of friction modifier already added to their oil so none is needed. So far, absolutely no chatter though everything feels tight like a slight loss of power. I'm guessing that will lessen with use. Only 22 miles so far but I can feel a difference pulling out in my stone driveway and in gravel situations. BTW, the valvoline was only $ 4.50 a quart ( liter ? ) while the Coastal brand, a generic I think, was a buck more. No idea why. Ford full synthetic was $ 16.00 a quart. I paid a guy $ 95 for the installation which sounded really reasonable especially since he put new carrier bearings in.
Anyway, thought some of the guys might be interested in this info.
