kcjaz
SILVER Star
I know the capacity of the rear differential is 4.39 to 4.49 U.S. quarts according to the FSM. When I changed the gear oil today. it only took about 4 QTs. I was filling it with the truck on my lift so the axil was at full droop which would rotate the diff a bit so I lowed it to the floor and it took a bit more but still not what the FSM says. This is the first time I’ve changed the diff oil since I had lockers installed. Would lockers reduce the oil capacity a small amount by taking up some space?