Changing the fluid in your Honda CRV's differential is an important maintenance task. Ensuring that the differential has clean fluid helps sustain the CRV's performance as well as prolong the life of its parts. Changing the fluid in the differential--the gear assembly used to turn the rear axle--only takes a few minutes. Before beginning the task, make sure that your CRV is in park with the parking brake on, and that the differential has been given several hours to cool.
Place the drain pan underneath the rear differential and then open the fill plug with the 3/8-inch socket. The fill plug will be on the side of the differential near the top.
Open the drain plug and allow all of the fluid to drain into the pan you put underneath the differential. The drain plug will also be on the side of the differential, but toward the bottom.
Clean the area around the fill hole and the drain hole with a scouring pad and a clean rag, making sure that no grime gets into the differential.
Replace the crush washers on the drain plug and the fill plug.
Screw the drain plug with the new crush washer back into the drain hole and tighten it to 35 foot-pounds of torque using the torque wrench.
Insert the fill hose securely into the fill hole and then place a funnel on the other end of the hose.
Pour 1 1/3 quarts of Honda Genuine Dual Pump Fluid II into the differential. If you cannot keep an accurate measurement of the amount of fluid that you pour, simply keep pouring until liquid begins to overflow from the differential.
Screw the fill plug with the new crush washer back into the fill hole and tighten it to 35 foot-pounds of torque.
Check your old fluid for any metal bits; this could indicate a problem inside your differential that should be fixed immediately.
Be careful not to let any foreign objects fall into your differential because they can damage the parts inside.