Overheating and/or lack of proper venting can cause the rear axle seals to leak. Excessive fluid loss can result in major damage to the rear differential assembly and/or axle bearings.
Nissan Titan Problem Reports
Most Reported Nissan Titan Problem Reports
A weak or failing fuel pump can cause power loss due to lower fuel pressure and lean mixture conditions. This rarely causes a Check Engine Light to illuminate and should be repaired to avoid catalytic converter damage.
after about 200 miles of constant driving vehicle would jerk very badly as if transmission were slipping. Just found a TSB for pump failure under full acceleration. replaced no problems since- pending