where do i put the rear axle fluid in?

[PowerstrokeAaron]

i have an 04 f250 and the only hole on top that i can see is where the electrical sensor bolts the the differential, is this where I put the fluid in? thanks

[scotty2280]

there is a nut on top, kind of sucks, but not to bad, just make sure you put in the right amount and the fluid for the limited slip(if you have it).

[PowerstrokeAaron]

hmm i might be blind but the only 2 that are on the top is the bolt that holds down the electrical connection(im guessing its a speed sensor or something) and a small 7/16(i think) bolt head that is a bracket for the brake line. My only guess would be to unscrew the electrical one and when the electrical thing pulls out thats where the fluid goes in? btw the truck is an 04 harley davidson with 373 LSD

[lightninmike]

Its on the drivers side of the pinion housing. It is a plug that you take out with just an wratchet.... 3/8 iirc. It is not in the top of the housing!

[scotty2280]

thats it, it been awhile since i did it.

[Stoker0560]

be sure you put in correct fluid..fill it on level surface untill it starts coming back out the fill hole.. the plug itself is also a magnet, doesnt hurt to clean it so you can monitor wear everytime you check it..