Rear Diff Fluid Volume?
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Joined: Mar 1999
Posts: 65
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From: Dayton, OH USA OH
Rear Diff Fluid Volume?
Hello All,
just replaced the rear differential fluid on my 1973 L 48. I'm not sure how much I removed from the differential as I was pumping the old stuff into an oil change container I have. It seemed that a lot more went in than came out though.
My question is how much fluid should be in the rear differential. I put 1 1/2 quarts in after first puting in 8 ounces of the GM Differential conditioner. After 56 ounces total of fluid (48 ounces of 80/90 weight and 8 ounces of conditioner) the rear differential started to overflow. Is this the right amount?
I removed as much of the old fluid as I could before the pump started sucking air.
Thanks for your insight
John in Dayton
just replaced the rear differential fluid on my 1973 L 48. I'm not sure how much I removed from the differential as I was pumping the old stuff into an oil change container I have. It seemed that a lot more went in than came out though.
My question is how much fluid should be in the rear differential. I put 1 1/2 quarts in after first puting in 8 ounces of the GM Differential conditioner. After 56 ounces total of fluid (48 ounces of 80/90 weight and 8 ounces of conditioner) the rear differential started to overflow. Is this the right amount?
I removed as much of the old fluid as I could before the pump started sucking air.
Thanks for your insight
John in Dayton
Melting Slicks
Joined: Feb 2006
Posts: 3,428
Likes: 5
From: Japan
ALRIGHT ALREADY!!! Now you did it- you made me get up and go fish my shop manual out of the garage. It gives the fill capacity for the differential as "3 3/4 pints". That's 60 ounces, so it sounds like you had about 4 oz. laying in the carrier. Well done Grasshopper!
Burning Brakes
Joined: Nov 2005
Posts: 832
Likes: 1
From: Breckenridge Colorado
Originally Posted by IMA66/74
what if the back of the car was on ramps? How far off would the fluid level be?
I need to build a garage soon and get a lift in there. It is getting tough to crawl under the car and I am not that fat yet.
