Zele Performance(Yokohama, Japan) have completed development of the rear differential oil cooler and have set the release date.
Starting October 20th 2008 this will be available for international ordering as a kit from Zele Performance distributors.

This kit was initially being developed inline with a transmission cooler kit but problems maintaining hydraulic oil pressure in the transmission caused that project to be put on hold for now.

This Rear Diff. Oil Cooler Kit is designed to be used with Zele Titanium Exhaust System Type I (under development).