Note that axle seal leaks/failures are otfen cause by other things so is Not a simple as a "bad" seal. Big ones are:
Iffy Axle bearing(s) can allow the axle to move sideways more then the seal can handle.
Replacing a seal w/o sealer "glue" lets oil/fluid leaking between seal outer and case. Paint the seal w/ High Tach or Super 300 "Paint" gasket sealer to seal small gaps and damage in the hole.
Axle can wear where meets the seal. Or rust where old seal doesn't cover. New seals have same PN but can be made w/ small difference and doesn't match the old one exactly. Can try cleaning or repair sleeve sim to crank balance sleeves but doesn't always work because might have either/both previous problems.
Auto trans axle bearing are very often simple sleeve type and wear out. You need right tools to replace them w/o tearing the trans apart.
Stick cars often have dif bearing problems and does same thing to axles.
| quote | Originally posted by fieroguru: The 4 speed, 5 speed (Getrag, Isuzu, F23) and 6 speed (F40) axles seals are all the same. As well as the passenger side seal on the 125C, 4T60 and 4T65. |
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Both are same for TH125c. Drivers side is a big pain to remove. I have to replace several over the years.