Nissan PF, SE, 4WD, V-6, 4.0L, Auto., Here's the deal. Leaking transfer case main seal (rear) replaced. Cause was due to stiff/rusted, main drive shaft U-Joints. I guess the strain of the U-joints not working properly was transferred to the seal causing the leak. Mechanic replaced the seal and both u-joints. Found to be leaking approx 1 month later, brought back, replaced again (FOC). Mechainc added gasket sealers and proper lubrication throughout. Also inspected for cracked TC, and was fine, no cracks or compromises. While adding Air Lift kit over weekend I noticed the seal is leaking again. I am going back to the mechanic later today to see if he will honor repair but before I do, what can this guy be missing on install? Did the rusty u-joints cause something to get wacked out of alignment? Is there a trick to the install that this guy is missing. BTW, at the same time as initial repair, I had the rear seal replaced also and that one is not leaking, only the main, front seal.....
Please advise,