Truck slipping into 4th

blackbeauty7.3 · Wednesday at 10:07 AM

I have a 2011 f350 bone stock. Having issues with tranny it skips/hesitates going from 3rd to 4th gear. Does it hot and cold. Put two new batteries in it which seemed to have helped a bit but I’m still noticing it. Aside from the basics of checking the fluid level and condition any other ideas what to test? I do have access to autoengenuity, autel and forscan but didn’t see any trans related codes? I’m thinking maybe valve body? Any help is appreciated

Powerstroke Cowboy · Wednesday at 10:54 AM

Sounds like the valve body. Most times though they have a hard shift at town speeds.

If you have access to forscan do a trans relearn and see if that takes care of the problem. If it doesn't I'd be willing to believe it's the valve body/solenoid.

blackbeauty7.3 · Wednesday at 1:04 PM

Awesome thank you for the assistance. I’ll keep you posted.

blackbeauty7.3 · Wednesday at 2:28 PM

Well I did the reset and if anything it seems to have made it worse. Driving through town it shifted hard into second then slipped and rpms revved up before shifting into 4th. Any way to confirm it’s the valve body. Would hate to spend the $900 for it to be something else.

Powerstroke Cowboy · Wednesday at 8:34 PM

Did you follow the specific process outlined for the rest? If it's bad solenoids in the valve body a reset will not help it.

blackbeauty7.3 · Wednesday at 9:04 PM

Powerstroke Cowboy said:
Did you follow the specific process outlined for the rest? If it's bad solenoids in the valve body a reset will not help it.

I believe I performed it correctly. I’m leaning towards valve body being bad.

Powerstroke Cowboy · Wednesday at 9:23 PM

blackbeauty7.3 said:
I believe I performed it correctly. I’m leaning towards valve body being bad.

If you can, find a valve body that has all the fixes done to it. If your handy, you can rebuild the valve body yourself and add all new OEM solenoids.

ju015dd · Wednesday at 10:39 PM

First, how does the fluid look and smell? I just went through a v/b issue. I had to pull mine and repair the 2/3 valve. It was hung open. No codes associated .