I've been having a issue with either the trans or transfer case. I've only gotten two codes which where 4th gear incorrect ratio and 5th gear incorrect ratio. That's only happen three times. Is what it's doing is after warmed up anything over half throttle the truck feels like it throws itself into neutral when the turbo starts to light, 3000rpm and up. When the truck is still cold it shifts perfect. I pulled speed sensor out of transfer case and tone wheel isn't loose, sensor didn't have any metal on it and fluid looked fine. Checked the other two speed sensors on trans and they seemed fine but couldn't see inside. Any ideas before I pull it all apart? Will have to pull trans anyways for a re stall on converter. Will open transfer case first.