Rear Diff Seal ???
Lead Driver
Joined: Apr 2011
Posts: 6,399
Likes: 40
From: El Dorado, Arkansas
You have the same gear ratio as what came in my truck ("08"). That's a 28-spline open differential with a 3.50:1 ratio.
The other two most common ratios were "17" and "09". 17 would be a 3.25:1 ratio. "09" would be a 3.70:1 ratio.
Two number digits under the Axle heading on the door tag indicates an open (single track) differential. An alpha-numeric, such as "B9" would indicate a 28 spline Traction-Lok differential with 3.50 gears.
If there's still a tag affixed to one of the (10) studs on the rear end housing, the first string on the 2nd line of the tag should read "3.50". If you had had a Traction-Lok differential, the 2nd string would have read "3L50".
The other two most common ratios were "17" and "09". 17 would be a 3.25:1 ratio. "09" would be a 3.70:1 ratio.
Two number digits under the Axle heading on the door tag indicates an open (single track) differential. An alpha-numeric, such as "B9" would indicate a 28 spline Traction-Lok differential with 3.50 gears.
If there's still a tag affixed to one of the (10) studs on the rear end housing, the first string on the 2nd line of the tag should read "3.50". If you had had a Traction-Lok differential, the 2nd string would have read "3L50".
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Senior User
Joined: Feb 2016
Posts: 141
Likes: 0
You have the same gear ratio as what came in my truck ("08"). That's a 28-spline open differential with a 3.50:1 ratio.
The other two most common ratios were "17" and "09". 17 would be a 3.25:1 ratio. "09" would be a 3.70:1 ratio.
Two number digits under the Axle heading on the door tag indicates an open (single track) differential. An alpha-numeric, such as "B9" would indicate a 28 spline Traction-Lok differential with 3.50 gears.
If there's still a tag affixed to one of the (10) studs on the rear end housing, the first string on the 2nd line of the tag should read "3.50". If you had had a Traction-Lok differential, the 2nd string would have read "3L50".
The other two most common ratios were "17" and "09". 17 would be a 3.25:1 ratio. "09" would be a 3.70:1 ratio.
Two number digits under the Axle heading on the door tag indicates an open (single track) differential. An alpha-numeric, such as "B9" would indicate a 28 spline Traction-Lok differential with 3.50 gears.
If there's still a tag affixed to one of the (10) studs on the rear end housing, the first string on the 2nd line of the tag should read "3.50". If you had had a Traction-Lok differential, the 2nd string would have read "3L50".
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
That's a nasty pumpkin. Eww. Do yourself a favor and clean it up. Do it... Working on a filthy, smelly, and muck-laden vehicle is no fun.... it's more "work" than leisure.
Based on where it mucky, I'd put my money on a bad pinion seal. If you're not inclined to do it yourself, find a reputable driveline shop and have the pumpkin rebuilt and set up. You may want to consider changing the gear ratios and/or adding a limited slip or a streetable locker at this time.
While the pumpkin is being rebuilt, replace the bearings and axle seals... maybe rebuild the brakes too. Then install the pumpkin, re-insert the axles, and reassemble the peripherals.
Observe break-in procedures if with new gears and/or traction aid device.
.
Based on where it mucky, I'd put my money on a bad pinion seal. If you're not inclined to do it yourself, find a reputable driveline shop and have the pumpkin rebuilt and set up. You may want to consider changing the gear ratios and/or adding a limited slip or a streetable locker at this time.
While the pumpkin is being rebuilt, replace the bearings and axle seals... maybe rebuild the brakes too. Then install the pumpkin, re-insert the axles, and reassemble the peripherals.
Observe break-in procedures if with new gears and/or traction aid device.
.
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