Bringing up a bit of an older post ,but we bought my wife a 2008 zr6 in april with 105,000klms on it and by 110,000 the whine came into it and gradually got louder.car was bought private so no warranty but being a mechanic myself spoke to terry shields toyota and were given the revised parts part numbers and in august last year order the parts direct from toyota japan at 1/3 of the cost i could get them through any aust toyota dealer and parts were meant to be 3 months getting here but turned up last week(6 months later),but still been driving car whole time and monitoring the noise,so this weekend 12 hrs later all need parts are in and car is as quiet as when we bought it,i do have pics of all the bits that are replaced and of gearbox in pieces and will post up later,so all up to do myself was $2500 and that includes all bits like seals and tranny oil aswell,so i couldnt complain as i know people through toyota have had 5500-8500 bills for the job,after looking at old bits the wear on the old gears is pretty bad,but if any info is wanted on the job just let me know as it is an easy and straight forward job just a bit time consuming