Axle Shaft problems of the 2007 Nissan Titan

The rear axle seals on my 2007 Nissan Titan continue to leak gear oil. I have replaced the seals three times including purchasing and replacing the entire axle shaft, seal and spacer assembly on the third time. These were 2 axle shaft assemblies which cost me over $1000. I have also installed a breather tube on the rear axle and insured it is allowing air to get in and vent the rear axle. It's been a few months after installation and the seals are leaking again. My rear brakes and parking brake are soaked with oil and the parking brake no longer holds the truck in place when parked on a incline/decline.

My 2007 Nissan Titan le 4x4 has experienced (3) rear axle shaft seal failures in addition to (3) front axle shaft seal failures all within about 20,000 miles of each other. The rear axle seal failures are a safety concern to me. The differential fluid leaks directly onto the rear brake rotors which causes a reduction in braking ability. It is clear after some research that this is a very common issue with multiple model year Nissan Titan trucks. Nissan should address this issue and offer a permanent solution so we would not be faced with this safety issue in the future. My first rear axle shaft seal failure occurred at 56,672 miles on 6/9/14. I had another fail at 62,930 on 11/4/14. The third on 8/23/15 at 75,000 miles. The front axle shaft seal failures occurred at 53,139 on 3/20/14, again in October 2014 (mileage not available), and then at 65,105 miles on 1/21/15. Btw, I have tried submitting this twice before and gotten errors so I apologize if this has actually worked all 3 times.

Noticed black grease/oil on right rear rim. Dealer diagnosed as right rear axel seal leaking. Dealer replaced right rear axle shaft, bearing and seal, covered under power train warranty. 2007 Titan se 4x4 with off road package. 29,500 miles.

Nissan Titan '07 power train:axle assembly:axle shaft:seal.