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Re: GMC rear differential
There is no drain plug. You have to take cover off to drain. After it has drained, clean cover surface and housing surface, if gasget is ok not mared or broken you can reuse it with a thin layer of silacone, if its tore up to bad clean old gasget off real good and you can either get a new gasget or use silacone, and put it back on and refill it thru filler plug, and fill until it comes out filler hole, if you use silacone make sure you use enought, like a quarter to a half inch wide bead and let it set a while before you put the rearend grease back in maybe a half hour or so. That way it has enought time to set up.
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You will need to remove the rear diff cover. There is a small bolt that secures the pin that the spider gears ride on. remove this bolt, and then remove the pin(you might call it a shaft). Remove the caliper and rotor from the side you are replacing, and push the axle in. Inside the differential, you will see what we call a c-clip on the end of the axle shaft you just pushed in. Sometimes this clip if it is in the right position, will fall out on it's own. If not, slide it off, and go pull the axle out. Now you can pry out the seal and replace it. There will be a pipe plug with a square recess on the front side of the differential. You can put a 3/8 drive ratchet in the recess and unscrew it. This is the fill plug. You fill the rear end untill it runs back out of this hole. It will be located about half-way up from the bottom of the differential housing.
I assume you are talking about the rear differential. There is not a drain plug. Two ways you can change fluid - 1) Remove differential cover, let fluid drain, reseal with rtv, and tighten down. To refill there is a plug that you need to remove, fill until fluid comes out the hole. 2) Use a device to **** fluid from fill hole, then refill.
Yes is the short answer. Did you blow the gears in your front differential or you going to put a whole new pumpkin in? If you are replacing the entire pumpkin drain it first. Then make sure to support it with a transmission jack first. Remove the tires. Then remover the CV axles and lower the pumpkin. Your vehicle requires a 75w90 synthetic axle lube for a refill. Good luck.
The tranny fluid is added through the tranny dipstick (make sure it's not the oil dipstick). Fluid color should be red and the dipstick should have instructions on how to check level (car in park, engine at idle). Funnels are your friend here.
There is a drain plug on some vehicles at the bottom side of the differential that must be removed to drain the old oil out but on others you must remove the cover which has at least ten bolts that are in a circle pattern around the differential cover. After removing the cover and draining the old oil out dry out the excess oil left inside the casing with a clean rag, scrape off any old gasket material on both the differential casing and the cover. Purchase a gasket for the cover and reinstall the cover tightening the bolts in a criss cross or X pattern not too tight . Proceed to locate the filler plug on the upper right or left side of the differential, this plug is usually removed with the square end of a 3/8" socket wrench just using the square end of the socket wrench should do it or you may need a large hex head allen wrench but usually using a short extention with the socket wrench to get the clearance to turn the square end of the extention or socket wrench inside the plug will work, some times the plug is very tight and you may need to use a 1/2' drive socket wrench with a 1/2" to 3/8" reducer or adapter to acheive the neccessary torque required to crack the filler plug free, now get a coulple of 80/90 weight gear oil quarts and cut the filler tip back a bit with a razor or utility knife and using a 3/8" length of rubber hose slide it over the end of the tip tighten a small hose clamp on to the hose to prevent it from sliding off the filler tip, then feed the end of the hose into the filler hole on the differential and invert and sqeeze the container of oil to force the oil into the differential until it fills and over flows out the filler hole, screw in the filler plug and tighten. Use this general procedure for both the front and back differentials.
Apply sealant to thread of level / filler plug, and then tighten it to specified torque. A: Sealant 99000-31260SUZUKI Bond No.1217G Tightening torque Differential oil level / filler plug b: 23 Nm (2.3 kg-m, 17.0 ft. lbs.)
Drive the vehicle for about 1 minute to warm up the fluid a little.
Locate the 'pumpkin' on the rear axle. It is in the center of the axle.
Now locate the two caps. The upper cap is for filling, the lower for draining.
FIRST - loosen & remove the upper cap...just in case.
Second, place a oil pan below the drain plug...loosen and replace the drain plug. Allow to drain for 10 minutes.
Install drain plug, tighten to spec. (snug)
Add proper amount of fluid in top filler hole. You WILL need a hand pump or other device as this is impossible to do using the gallon jug of VTM4.