Differential oil
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Cargo Master
Joined: Jul 2006
Posts: 3,014
Likes: 91
From: Concord, CA
Differential oil
Reading through the manual it talks about removing the drain plug on the 9" rear in order to drain the oil. Interesting since they don't have a drain plug at the bottom and why isn't there one? So just how does one drain the oil in order to replace? I'm thinking of hooking up my vacuum pump and pulling it out that way.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
Mike, Some of the rears have big nuts on the back or a smaller one on the front. Should your rear not have a drain, it could have been because someone has swapped in a front draining chunk with one from a rear draining rear.
Or something like that.
Changing the oil in the rear is not critical so doing it every ten years or so should be ok. IMHO
John
Or something like that.
Changing the oil in the rear is not critical so doing it every ten years or so should be ok. IMHO
John
Elder User
Joined: Jul 2006
Posts: 930
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From: East Helena MT
My 9 Inch rear end does not have a drain plug either, just a fill plug. When I filled it up with synthetic oil I just used a suction devise that looks like a grease gun only it is used to suck fluid up and removed the old oil that way. Then I just filled it up with new oil. I picked up that oil suction tool for only 9.99 at a local parts story and works well.
Jeff
Jeff
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
I guess, I didn't do a good job with my post, a fill hole might be a better observation.
To drain one it might be better to open it up. That way you can wipe it out, and visually inspect it. A drain plug wouldn't allow that to happen.
You should be able to complete the job in an hour or less.
John
To drain one it might be better to open it up. That way you can wipe it out, and visually inspect it. A drain plug wouldn't allow that to happen.
You should be able to complete the job in an hour or less.
John
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Cargo Master
Joined: Jul 2006
Posts: 3,014
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From: Concord, CA
An hour or less? Seems to me that means separating the drive shaft from the yoke before removing all the bolts that hold the front plate on. Then that would mean getting new copper washers to place under the bolts before closing it all back up and God knows what else...
Posting Guru
Joined: Dec 2000
Posts: 1,793
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From: San Diego CA
Don't forget removing the rear wheels and pulling the axles. Over the years 9"s have had a few different fill hole locations. You have to pay attention when swapping things around. I ended up with a combo that had no fill hole anywhere once and didn't notice till it was time to fill it. Took it all back apart and drilled and tapped both fill and drain holes in the housing.
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Cargo Master
Joined: Jul 2006
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From: Concord, CA
Well there is definitely a fill hole on the backside. As for removing wheels and axles I was just there last week and have no desire to visit them again so soon...
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From: San Diego CA
A turkey baster with a piece of 3/8 fuel hose will do the job. Just use an old one and never let the wife see it. Oh yah and don't try to use it this Thanksgiving to baste Mr Turkey. It will remain a shop tool forever.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
Mike, I may have made a mistake, by not putting new copper washers on, but have always reused the existing ones.
When I said an hour or less, I did presume you knew what was required and had everything needed to do the job. It isn't a job that one would do often, but I think the job can be pulled off in an hour.
John
When I said an hour or less, I did presume you knew what was required and had everything needed to do the job. It isn't a job that one would do often, but I think the job can be pulled off in an hour.
John
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