Hi, new here. I’ve read a lot of posts on here and noticed a lot of knowledgeable people but I wasn’t able to find an answer to my question. I have. 2000 f250 4x4 7.3l. I was driving down the highway the other day and went to go around someone and got on it a little and also hit a big bump at the same time, as soon as I hit the bump I lost all gears, no forward no reverse. It does go into park and there is a a change in idle when shifting through the gears. I ran the pressure checks today and not sure what to make of it, I posted the pressures below. According to the manual the manual 1 and 2 are high at idle and should not drop on the stall test. All other pressures seem to be within spec. I also checked for codes using auto enginuity and none for trans but I’m not sure it’s actually reading them. I did check live data for the shift solenoids and it’s saying shift solenoid 1 is always on through every gear and solenoid 2 comes on in manual 2. Oh and trans fluid is full. Sorry for the long post, just seeing if I can get some insight on this before I pull the pan.At idle
Reverse 80psi

Park/neutral 60psi

Drive 60 psi

Manual 2 150psi

Manual 1 160 psi



Stall test

Reverse 240psi jumping around

Drive 150psi

Manual 2 65psi drops

Manual 1 105psi drops

 

When you say it goes into park does that mean it holds when in park? If it holds, pull the trans out and rebuild or replace it. If it rolls in park, pull the transfer case out and rebuild or replace it.

Don't bother dropping the pan. I know it's fun to do, but you won't find anything in there that can fix this.

 

Yes it holds in park. Thanks for the response, you’re just the one I was hoping to get a response from! What do you think happened? As far as what internal issue am I looking at?

 

You're looking for a stripped spline, a detached drum, or a broken shaft. I can't tell which one of those is the cause.

 

Awesome, thank you sir!

 

Just to update the thread for anyone researching. I pulled the trans apart to rebuild and found the inside splines stripped out in the forward clutch drum