Quote Originally Posted by BPTactical View Post
Pull the tranny, pull the flywheel, pull the seal retainer, replace seal.
Assembly is the reverse of the aforementioned.

Anything else is a waste of time and money.
I will pull the engine before I do that just because I had my own business rebuilding the 700R4 200R4 4L60E and 4L80E transmissions. I used to do alot of those trucks and I hate laying on the ground and pulling the trans, and I am not in the physical condition to do it or I probably would go that rout one more time. I have it down to a science it only takes me a couple of hours to take it out and a couple hours to put it back in.