I cannot stress enough how important it is to measure the endplay in the trans once assembled. Also make sure all of your thrusts are in correctly as one of them is pictured wrong in the manuals as to how it goes in. To check thrust you have to tuen it bellhousing up, and go through the PTO cover hole with a screwdriver or prybar to lift up on the drum assembly. You can use a dial indicator, or a micrometer by measuring the protrusion with the drum down, and then again with the drum lifted up. I don't recall what it is off the top of my head, but I think it's roughly .030-.045 you want(not certain, so don't quote me on it, check a manual). Endplay is the quickest way to tell if you have a thrust out of place or dropped on assembly because if one is off, it will throw the thrust endplay measurement WAY OFF. Also, before you go to drop the front portion in, make sure the intermediate shaft is dropped in all the way. There is a tool for holding it up during assembly, but I normally use a wooden block through the PTO cover hole. It can be a PITA to get to drop in once the back end is together.