Leaking axle seal

Also,

 

Anyone know if this is the same depth for the pass side of a 2nd gen for this seal

 

Timmy shows the process of tapping in the passenger side seal and measuring (although on a 3rd gen T4R). Have done this on 03 Tundra with aftermarket seal at right depth that leaked then replaced with Toyota seal (that appeared to have a very minor lip difference) at appropriate depth measured by caliper that didn't leak but also verified front differential and actuator breathers were clear.

 

I tapped into same depth as oem seal with NAPA and I’m still leaking. Small drops collecting on the diff housing vs leaking like a sieve. The old seal was destroyed so I’m still in a better place than I was. Will have to get a Toyota seal and redo but I can at least drive it right now.

Don’t burn me at the stake. My 2nd gen is 2UZ

 

Is it possible your diff breather isn’t working, so you’re building up excess pressure inside the axle housing?

 

Here's how I verified front differential and actuator breathers were clear.

 

Positive. The front diff breather has been moved just like the rear