i am doing some maintence on my wife's Grandfathers truck. it's a 95 F350 crew cab dually 2wd diesel. i changed the engine oil and filter (which was super duper black, is that normal for diesels?), tranny oil and filter, going to grease the drive line, and change the rear diff oil.. i was just about to crack the cover off when i noticed that there isn't a fill plug... or is there one and i am just blind... can you guys help me out?? thanks. also i was going to put in 80-90w oil... is that the correct weight? or should i use that heave 80-140w?

Thanks for any help!!!!

Steve:D :usa:

Have you looked on the driver's side of the housing forward of the axle tube? There should be a plug there.

Diesel oil is always jet black...even after only a few miles.

There is a fill plug on the driverside of the rear diff about halfway up. It has a 3/8" square whole in the plug, just stick a 3/8" ratchet in the hole and unscrew it.