Used the booted seal. It's the original yoke and shaft. At least I think so not sure. Doesn't seem loose. The seal vibrated its way off thats why I am getting the shaft balanced. Drove it on the highway and it vibrates in a certain rpm range. So I replaced the seal used sealant and it still leaks. Comes from where the yoke meets the seal.The trans is not original; bought a street/strip trans.