So I've had this reoccurring problem with my 4runner. It's 97 sr5 4wd 5spd. Well, one of the rear axle seals started leaking and I got it fixed, then the opposite side started leaking. The mechanic mentioned that both seals were leaking, not just the one side. So he replaced both for free trying to make sure that it was done right.

Within a few months one of them was leaking again, so I took it back to the mechanic, and he had an actual toyota dealership mechanic come and double check all his work. He also only charged me parts that time around. After I got it back I got the tip on the vent being plugged. So then I looked at the vent and it seemed gunked up, so I twisted it until it could spin freely again. Within 2 months a seal was leaking again, so I took it back to the mechanic and he said that now both seals were leaking again. Not only that, he checked the rear diff vent and said he was able to blow air through it just fine.

So I have the truck back and the mechanic didn't change anything for fear that it would just come back. He suggested I take it to a dealership and get a guarantee on the replacements.

Has anyone else ever come across this? This is getting rediculous. Does it sound like I need a new rear end?

The bearing should of been replaced. Toyota has an updated seal for the taco's and 4runners. Next time get seal # 90311-50006

The bearings were changed each time the seals were changed. New inner and outer seals, new wheel bearings, and new brakes since they were messed up by gear oil each time.

Also the last time the driver's side was replaced was two months ago and it is leaking now as well.

Maybe the sleeve on the axle itself is pushed too far and the seal dosen't sit on it??