I rebuilt mine a few years ago, wasn't too tough but you do need a good bearing puller and a press. I got my rebuild kit from www.drivetrain.com - costs about $130 and comes with all new bearings. If you need to replace the syncros, those cost extra. You need to take your T18 apart to measure a couple parts before you can get the rebuild kit, there are several thicknesses of front bearings, and different sized syncros depending on the T18 you have.