I just did it two weeks ago. Its not fun... but you can do it. I think it will take you a day to pull the trans, break it down and inspect the internals for what you need to buy. I know you think your going to just buy a rebuild kit and some common failure items and you will just have them ready so you can rebuild immediately... but I will say that is a fools plan. Whats really going to happen is your going to open it and find something unexpected... what that is, i dont know, maybe you break something (wire harness, thrust washer, etc.). Maybe you find something you didnt see coming(4th clutch shaft teeth getting ready to strip out). Whatever, the thing is if this happens, then you must order parts and wait for them to be delivered. OR if you have a local tranny shop, you can get them immediately, but thats going to cost double what you can get things for online. So, then it might be extra money and extra days before you can reassemble.
The question you must ask yourself is this.... Are you willing to accept that this could take alot longer than you think it will? Are you willing to accept this might cost more money than you planned it would? Are you willing to accept that there is great potential for error that would cuase you to have to re-do? If you are willing to accept these risks and conditions, and you have the tools and space to do it, then you have a green light. Do it. its just nuts and bolts if you think about it.
If these things seem like you cannot accept them, a week without this car, extra hundreds of dollars, redoing it if something was done wrong, then you should consider alternatives. Good luck. you should download a copy of the repair manual for this trans from
ATSG 4T65E to see what its going to take. also check out this link...
Illustrated 4T65E Rebuild : General Chat
The choice is yours... this is just what its going to look like.
