changing diff fluid on a slight decline?

[apollo18]

hello, i will be changing my diff fluid soon however the only place i can do it has a slight decline. my truck is high enough so i can easily remove the fill and drain plugs by just sliding over and i dont have a jack rn to level out the truck.

is this something to worry about or is it fine?

with my calculation in my head, it seems like if the diff is on a slight decline it will take slightly more fluid compared to a diff that is level.

 

thanks!

[davester]

A slight incline/decline is fine.

[Beamie]

I just did mine. There was about a 2" to 3"  decline over the length of the truck, low in the front. I filled the rear differential to bottom of the fill hole, let it drip until it stopped and temporarily put the plug in. Then I ran the front wheels partly up on ramps ( a wood 2"x would also so) until the truck was as level as I could tell (with a level on several places) and pulled the drain plug to recheck the fluid. It was definitely low and needed more than I expected  before it started to run out again.

 

I don't know if that is the optimum fill level for your truck or not, but if it was out of level when you filled it, it may be too high or too low when it's level, depending on whether the front or rear was low when you did it.

 

It's easy enough to pull the plug when you find a level spot to use.