2004 Ford F-150 slips

Tiny
RAY30
  • MEMBER
  • 2004 FORD F-150
  • V8
  • 4WD
  • AUTOMATIC
  • 99,000 MILES
We have this F150 and when it shifts to OD the transmission just neutrals out. When we were rebuilding it the direct drum and clutches were burnt so bad that we replaced all of that section. We also used a standard rebuild kit and a new torque converter. The problem is the same even after the rebuild. We have went through the valve body and checked for stuck valves and made sure that all the screens are clean. Do you have any thoughts on this?
Thursday, March 13th, 2008 AT 11:45 AM

3 Replies

Tiny
FLEXY5
  • MECHANIC
  • 512 POSTS
My first thought is to recheck the direct drum assembly for missing or damaged seals. You can use reduced air pressure and a nozzle to test all of the clutch assemblies. Then check all the case portals for debri. Is this the 4R70W or the 4R100?
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Wednesday, March 24th, 2021 AT 10:05 AM
Tiny
RAY30
  • MEMBER
  • 3 POSTS
The transmission is a 4R75E. When we took the transmission back out yesterday we did air check the case and the drum everything seems alright. I thought that we had changed the direct drum but all we did was the steels, clutches, and seals. I got a whole new assembled drum last night. We are installing it right now. I will let you know how it turns out.
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Wednesday, March 24th, 2021 AT 10:05 AM
Tiny
RAY30
  • MEMBER
  • 3 POSTS
Well we replaced the direct drum with a new complete unit and the transmisison works fantastic hurray! Just thought I would let you know. Thanks for the help
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Wednesday, March 24th, 2021 AT 10:05 AM

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