rebuilding my first 200 4r. set the end play per chris book. when i assembled everything in the case i could not get the snap ring in. clearance on the bench was .003. clearance before rebuild was .053. as i took everything back out (for the 20th time) i noticed when i pulled up on the output shaft it looked like if i could hold it there i could install the snap ring. as i looked at the yoke i have mounted it is not as long as the ones you can buy at the parts stores. the parking pawl looks to be in the right spot. i had to install an extra snap ring on the sun shell to get my clearance. other than support, what is the function of the yoke. this trans was in excellent condition when i tore it down, just did not know anything about it and needed to put some upgrades in it. thanks a lot.