Pete, try a trick that I learned many years ago. Changer your rear end oil and add 1/2 cup of DOT 3 or 4 brake fluid. The brake fluid will swell the seal and not hurt anything. It the seal is cracked or broken it will not help. But most likely it is just hard and has shrunk.
Keep in mind that the rear gear oil also lubes the axle bearings so those seals are going to get destroyed by the brake fluid. That trick works for a quick sale but the seals actually turn mushy so they do not seal for long after that treatment.
And be sure to check that the differential breather is open and clear, if is clogged that will cause the leak. There are several things that can cause a pinion leak in addition to just a worn seal, bad rear u-joint or pinion bearings are to things to check.
Russell E Johnson
welcome Pete, it is nice to see another member joining the group.
Apr 28, 2016
Rick Faunce
I see you took my advice and came over. Welcome.
Apr 29, 2016
Jack Wasmuth
Pete, try a trick that I learned many years ago. Changer your rear end oil and add 1/2 cup of DOT 3 or 4 brake fluid. The brake fluid will swell the seal and not hurt anything. It the seal is cracked or broken it will not help. But most likely it is just hard and has shrunk.
May 6, 2016
Rick Faunce
Keep in mind that the rear gear oil also lubes the axle bearings so those seals are going to get destroyed by the brake fluid. That trick works for a quick sale but the seals actually turn mushy so they do not seal for long after that treatment.
May 7, 2016
Rick Faunce
And be sure to check that the differential breather is open and clear, if is clogged that will cause the leak. There are several things that can cause a pinion leak in addition to just a worn seal, bad rear u-joint or pinion bearings are to things to check.
May 7, 2016
Jimco_W001
Hi Rick, transmission case breathers can be affected too. Mud. Bugs. Or who knows what happened. Thanks for the good advice.
May 7, 2016