Overdrive and shifts problems

Tiny
CHRIS2100
  • MEMBER
  • 1997 FORD F-150
Transmission problem V8 Four Wheel Drive Automatic 142000 miles

Hi my 1997 f-150 5.4v8 has had a few wierd shifting problems that are starting to get worse. My check engine light is always on. I checked the codes and theres always the same two.

P0755 - Shift Solenoid B Error
P1728 - Tran Slip Error

They come back very quickly after I clear them. For a while now my truck doesnt want to shift from first to second very easily. It revs really high in first and I have to let off the gas and then it shifts into second. It does this about 50% of the time.

The second, and more serious thing, is that quite often (say maybe 3 or 4 times a week with regular driving) my overdrive "OFF" light starts flashing on my shifter. When its doing this the truck shifts very rough. It doesnt go away until I turn off the ignition and then start it again. Then its good. Sometimes for a week and sometimes for a half hour. Is this just a sensor or is something more serious like my tourque convertor? I've asked my mechanic but he doesnt give me a straight answer so I though I'd ask rather than have him spend a few hours doing exploratory work.

Thanks for any help
Chris
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Wednesday, January 27th, 2010 AT 3:18 PM

2 Replies

Tiny
KEN
  • ADMIN
I would start by taking care of the P0755 - Shift Solenoid B Error which sounds like you need to replace the shift solenoid B.

Here is a guide to help you see what you are in for when dropping the pan.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Here is a guide to help you test the solenoids

https://www.2carpros.com/articles/how-to-use-a-voltmeter

Here are the locations (below)

Please let us know what you find. We are interested to see what it is.

Cheers, Ken
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Saturday, February 17th, 2018 AT 12:46 PM
Tiny
DRIVE
  • MEMBER
I had this problem and the transmission needed to be rebuilt for the tune of $1500.00 wow. I wish it was less I need the money.
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Saturday, February 17th, 2018 AT 12:47 PM

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