there is 2 different ways to change the fluid this is a drain plug on the front of the rear diff or you can take the back of the pumpkin off on the rear diff.
how much will cost me to change the bushing of ba falcon
yes the tranny oil and diff oil are seperate, typically there is a drain plug and a fill plug located on the diff usually a 3/4" combo wrench will do the trick
change rear diff fluid - Honda kind
A = Oil Change1 = Tire Rotation6 = Rear Diff Fluid Change
Oil change + tire rotation + rear diff fluid replacement
Remove the diff cover.
There is a hole in the front diff guard, thats where you add it (remove the nut). On the left side of the diff there is another nut remove it to drain before adding.
You have to remove the diff cover, then replace with new gasket and refill thru plug.
Place a drain pan under the differential. Loosen the bolts, but don't take the diff cover completely off. Let the fluid drain into the drain pan. When it stops draining, take the diff cover off. Siphon out the remaining fluid from the bottom of the diff. Scrape off the remaining gasket. Place the new gasket on, with some RTV. Put the diff cover back on and tighten it. Remove the fill plug. Fill to the bottom of the fill plug. Replace the fill plug.
you need to pull your rear pumpkin(diff cover) and let the fluid drain out. When its done draining you need put your cover back on and either get a new seal or just use some silicone. unscrew the plug and fill it with diff fluid
remove the diff cover and let the fluid drain out into a pan. clean the mating surfaces on the both the diff and the cover. use gasket sealer (or proper gasket) on the cover and replace the cover, torque to spec. unbolt the filler cover located on the either the diff or the cover itself. stick the gear oil nozzle in the hole and fill until fluid starts to overflow from the filler hole. replace the filler bolt. you need to know if the rear end has a posi in it. GM posi units require a special additive.