My 99 Corolla has been having this problem since the new year. I have taken the car back 3 times. First, about 8 months before the new year, the same transmission shop replace the driver's axle. It was a re-manufacture one. Then 8 months later, I notice the gear lube leaking out of the seal area. Took the car in for repair and a transmission fluid service. This place is a good and honest place and this is the first time we are having the problem. They replaced the seal 3 times and finally the owner decided to replace the seal again but this time he also replace the axle with a brand new one instead of the re-manufacture one. The leak stopped until today. Each week I checked for leak and it didn't leak again until I saw it this morning. This time, the leak is smaller and the gear oil does not leak on the floor. The owner gave a few scenarios:
1) Bad engine mounts causing the vibration to damage the seal.
2) Bad transmission bearing where the inner axle is meeting the transmission.
3) Bad tire balancing which is not a problem as the car drives smooth at high speed. Also the tires are pretty new, under 10,000 miles on them.
Please give me some ideas what could be wrong with the car or what the mechanic might be doing wrong.
Worse come to worst, could I just check on the fluid every now and just drive it like that? How long before the fluid all leak out? I am worry that the differential will get damaged. How often would I have to check it if I just leave it?
Edited by Bad_dude, 12 April 2012 - 07:08 PM.