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.Google+
Car Problem Reports
Nissan Titan Overheating/Lack of Ventilation May Cause Rear Axle Seals to Leak
Nissan Titan Problem
Drive Trains Affected: 2WD, 4WD
Average Mileage: 85,180 mi (32,000 mi - 154,000 mi)
Visitor, 2005 Nissan Titan, 4WD, 76,000 mi
Noticed abnormally dirty wheel, closer examination indicated fluid leaking from right rear axle seal.
Visitor, 2007 Nissan Titan, 4WD, 93,000 mi
When vehicle had 62000 on it I took it to the dealer in Traverse CITY and told him about the vent problem on the rear differential the service manager said he never heard of this. I told him I wanted the vent replaced and he said the mechanic replaced it and I was charged becouse it was not pluged. At 90000 8 months later the pinion bearing started making noise and I took it to a local mechanic he opened the pig and it was full of moisture and he said the vent was never replaced we tried to get parts from nissan and their fix was to replace the whole rear end for 2000 dollars my mechanic found a outlet in Tennessee that just started manufacturing complete seal and bearing kits for this Dana rear end. He mentioned this was a comon problem with Nissan Titans and thats why they started to manufacture these kits. My mechanic said another 100 miles and I would have wiped out all the gears in the rear end. I would think this was a safety issue but Nissan in Traverse City, They have another dealer in Grand Rapids same owner, didnt think so. The seal and bearing kit will save you 1800 bucks so dont let them tell you they have to replace the whole differential.
Visitor, 2006 Nissan Titan
Right axle seal was replaced at 37,000, again at 93,000 and is leaking again at 137,000. Totally unacceptable costs associated with keeping this vehicle road worthy.
Visitor, 2005 Nissan Titan, 4WD, 50,423 mi
This rear axle is mis-designed from the start it eats axle seals like candy. The axle shaft is supported by a single tapered roller bearing. Any moron knows it takes 2 tapered roller bearings to support a load. Basic engineering tells us that this single bearing set up is crap.why there has not been a recall is beyond common sense.they recall crap like wires and fans but let this ride. Where is justice... I am replacing mine this time for the last time. Then I will let them leak and saturate the brakes. Then ride the brakes hard down mountains until the piece of crap burns to the ground. Then buy a real truck like a gm product!"!!! There is a street justice recall. This makes the third set of seals and breathers evev though the breathers are kept clean.
Visitor, 2004 Nissan Titan, 4WD, 134,000 mi
Leaking rear differential.
Visitor, 2006 Nissan Titan, 4WD, 58,000 mi
Rear axle seal failed and required replacement at my cost of $350.00
Visitor, 2005 Nissan Titan, 2WD, 111,251 mi
Rear-Diff Fluid has to be refilled on regular intervuls. Serious issue!!
Visitor, 2005 Nissan Titan, 4WD
my air conditioner doesn't blows any hot or cold air at all ,nothing
Visitor, 2006 Nissan Titan, 4WD, 42,000 mi
Started seeing fluid behind rear wheels at about 40,000 miles. Keep filling differential fluid every few months since can't afford work done. Finally found mechanic that will replace rear seals/breather less so hope there's no extra damage when they pull it apart. Why doesn't Nissan warranty this problem??? Or at least offer compensation due to design flaw. Dealer wants $35 a piece for seals...
Visitor, 2004 Nissan Titan, 2WD, 135,000 mi
I heard a whining noise on the way back from a 200 mile trip. Took it to my mechanic and he said the rear end was leaking. He opened it up and there was water in there. He said the rear end was shot. cost me $2300.