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4R75W transmission missing fourth gear and overdrive?

Tiny
TAPLEY
  • MEMBER
  • 2007 FORD F-150
  • 5.4L
  • V8
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
4R75W automatic transmission in the truck listed above King Ranch hard shifted (really hard) while accelerating out of a curve. It sputtered a little. The overdrive light came on and the reading on the dash said that the overdrive had malfunctioned. Other than that, it drove fine until I made it the other two miles home. Checked and the fluid was low, so I added fluid. The next day the reverse had gone out. Neutral was pulling forward and my overdrive was still out. Now reverse and neutral are back to normal but it slips into neutral as soon as fourth gear starts to grab.
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Wednesday, August 2nd, 2023 AT 8:59 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,942 POSTS
I would check the codes. These guides can help us get started on fixing the problem. It sounds like you have a shift solenoid that needs to be replaced. A CAN scan is needed, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Here is one for about $99.00 if you need it:

https://amzn.to/3ZixY4v

Please go over these guides and get back to us.

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Thursday, August 3rd, 2023 AT 11:59 AM

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