T7.5 lunchbox lockers do not retain the axle at the same distance as the spider gears this allows the shaft to float outboard about a .250 which can cause seal leaks and failures. I recommend buying a new axle seal and upon install not installing it flush but leaving it out a bit. Would also install one of our clamshell bushings to help properly support the CV shaft. CV's get pretty sloppy in a spider gear set-up and even worse with a lunchbox. Most carriers are machine bored to a .003-.006 tolerance where the side gears ride Toyota clamshell carriers are not. The support is then transfered to the spider pinion gears. The needle bearing provision Toyota designed into the case is insufficient. For further explanations of this issue see our product page. Tech video and install instructions with pictures. http://eastcoastgearsupply.com/i-14472912-toyota-7-5-clamshell-bushing.html .
Here is also a quick reference for all lunchbox locker installs since no one can read the instruction books sent...This is the cliff notes http://eastcoastgearsupply.com/files/PDF Files/lunchbox-locker-install-instructions.pdf
