I decided to replace my low miles traction lock with a true trac diff and 3:73 gears about 600 miles ago. I had an experienced person change and set up the diff and with all new bearings. I had instructed him to set it up with the least amount of lash possible. When I reinstalled my diff every thing seemed good (except for my notchy 3650 trans) but there are two problems---one is im not happy with the 3:73s as this ratio seems to be either too high or too low depending on what gear and what speed so I wish I stayed with the stock 3:27 gears or bumped up to just the 3:55s---for me 4:11s would have been too low. My other problem which is not good is that in the last 200 miles the diff now has way too much lash and Im getting too much clunk in the drivetrain to the point where I dont want to drive the car. I talked to the guy that set it up and said he will make it right if I bring the diff. back in-----holy crap as most of you know that is a lot of work with the I.R.S. So anyways what could he have done wrong setting up my diff? Also Im thinking when he re-does my diff that I should go back to my stock gears and maybe even putting the traction lock back in??? who has experienced something like this with the diff and gear ratio and any other thoughts would be appreciated.