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This came up so thought I would pass it on.
The Rear End Differential Assembly S/N for the old one that has come apart on a lot of us and the new S/N
Old Rear Diff Assy S/N 705501391
New Rear Diff Assy S/N 705501411
The problem with the Old Rear End is the case comes apart and things inside just come apart, gears and all. You will not be able to do much once is breaks and you will most likely have gear oil leaking at a slow rate for a day or two. However I was able to drive a very short distance in four wheel drive (front wheels will still pull) but the rear end made a lot of noise of gears grinding in the 100 feet or so I drove after mine went out so no idea how far you could drive if necessary.
You can check by just lifting the bed and you can see the sticker on the right side of the differential.
Here is a picture of mine with the new version installed after blowing out the old one.
The Rear End Differential Assembly S/N for the old one that has come apart on a lot of us and the new S/N
Old Rear Diff Assy S/N 705501391
New Rear Diff Assy S/N 705501411
The problem with the Old Rear End is the case comes apart and things inside just come apart, gears and all. You will not be able to do much once is breaks and you will most likely have gear oil leaking at a slow rate for a day or two. However I was able to drive a very short distance in four wheel drive (front wheels will still pull) but the rear end made a lot of noise of gears grinding in the 100 feet or so I drove after mine went out so no idea how far you could drive if necessary.
You can check by just lifting the bed and you can see the sticker on the right side of the differential.
Here is a picture of mine with the new version installed after blowing out the old one.
