Rb25 output shaft seal keeps leaking

[ANVIL]

Rb25 trans keeps leaking at the output shaft seal. Ive replaced the seal twice in a year, less than 1k miles. Parked my car again today to notice its leaking again. First time i used a napa seal, this last time i used an OEM seal and its been less than 500 miles. What can cause repeated failure of this seal? Any tips or tricks? I uninstall with a prybar and tap new seal in flush.

[feito]

have you checked your tranny breather?

[ANVIL]

have you checked your tranny breather?

Have not yet. Just saw the leak and got irritated. Ill take a look under it later today. Check that its not clogged right

[jedi03]

also make sure its not overfilled and last check for play in the tailshaft (wiggle the driveshaft and look for abnormal movement

[brndck]

+1 for play in the driveshaft or play in the output shaft of the transmission