2001 f150 xlt s/crew transmission is slipping in first gear after 30 mph it works ok

 

Is it a slip or just a late upshift? See if you can pull a code out of it.

 

Late up shift

 

Hard up shift

 

Both?

Is o/d light flashing? Speedo working properly? Check engine light?

If either the OD light is flashing or the check engine light is on you'll have to get it scanned.

 

Possibly a broken spring in the 1-2 accumulator.

 

I had the code check. it was # 755

 

At least it's not major, just a bad solenoid. Good for ya!

 

Thank you now how do I change it? and where shall i look for information?

 

"P0755 Shift Solenoid B Malfunction"

If you drop your tranny pan, you will see the 2 shift solenoids attached to the valve body. It's actually a solenoid pack that has both solenoids attached to a metal bracket. Disconnect the electrical connector and remove the 2 bolts that hold the solenoid pack on to the valve body and remove and replace with the new one. Quite easy!!