New to this forum, the other one I'm on has not been helpful at all. I have a 4D55T with 180 psi in cylinders 1 and 2, and 300 psi in cylinders 3 and 4. So, looks like I'm in need of a rebuild. I'm sure this question has been asked before, so if there is an existing thread that describes what I need, then please direct. From what I can tell, the Chinese re-build kits are not good, and there may be a shortage of parts necessary. If someone could please get me a parts list and sources, I would be eternally grateful. Thanks