I've been trying to get axle oil seals for the 28-spline IRS pumpkin for the left and right side. Every part store, including Ford, order in seals which are way too big. (31-spline?)

Anyone have the part numbers from any source ?

I have a 8.8 pumpkin with casting code that looks like RF.E95H-DA rev E

tag codes is 3L27 (327 ratio traction-lock) 8.8

model S511B

build date: 0C17 - 1990 March 17 (St Patricks day which may explain it all ;-) )