Another approach is to remove the bolts that hold the differential cover in place, remove the cover, and let the lube drain. I'd encourage you to get a new gasket before doing this. Also, I'd recommend a synthetic fluid. Good luck.
2008 XLT, 2.3 DOHC, 5R44e Automatic, 7.5" axle, 4.10 gears, 50 K miles
Motorcraft Blend in Engine, PS, PB, A/C, 225/70 x 15 Continental ContiTrac RWL tires,
extended cab, 6' bed, Access tonneau cover.
Previous vehicle: 1991 XLT, 2.3 SOHC (Lima), M5OD, 7.5 axle 3.45 gears. Donated to a charity.
I have a 98 Ranger and have changed the differential oil twice. I remove the pan and let it drain. My truck calls for 80-90 in the differential and ATF in the manual transmission. I use silicone type sealer rather than a gasket. (I'm not sure if they even have a gasket anymore)
I don't know if I have limited slip differencle. I'll try to get a gasket and look. Is there another way to tell if it's a LSD?
Jack up the rear end with both wheels off the ground, the tranny in neutral, & the E-brake released. Rotate one rear wheel (by hand) and watch the other wheel. If the other wheel turns in the same direction as the one you're turning, the diff is a LSD. If the other wheel turns in the opposite direction, you have an "open" diff. (non-LSD).
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.