Splitter splits rough

When I asked the guy at Peterbilt of Fargo he said my tranny (RTLO18918B) already has the updated splitter valve cover with the updated orifice holes. I replaced it today and it did NOT have the updated valve cover. On top of that it was missing 2 of the three O-rings that should have been there. The small one on the orifice hole on the side that mounts flush with the back of the tranny was gone. The other one was the big one that is placed around the nut inside the valve cover cap. I also noticed when I took the small air line off of the old one tranny fluid started dripping out of the air line. I am at a loss of how that got in there.

I also replaced the regulator today and by looking inside it I couldn't see anything obviously wrong.

I was not able to try it out because I am in the process of moving my air dryer from behind the fuel tank to in front of the drivers step where they usually go.

I will let you all know later on next week if it worked or not once I get her back up and running.

 

That would be the splitter valve cover that I replaced on mine yesterday. The new one I had did have the smaller orifice holes on it. Ill know if it worked later on next week....hopefully.

 

Makes sense to me. Thanks alot Bender I never would have thought of that. I will be dang sure to check that vent line. I just cleaned the ones on the rear ends yesterday. The old motor in this truck had a massive oil leak at one time and everything under there is covered in gunk. I would not be the least bit surprised if that tranny vent has at least a partial obstruction

 

Well for anyone who is interested I finally took the truck for a ride this morning. The splitter now splits as it should very smooth up and down shifting. Id like to say Thank you to Bender, Pablo-Ua, Pulling Trucker, Nevs, One Shot, Prarie Boy, HI Speed428, ENR, KW Forage, and Special K for responding and helping me figure this issue out.