E4od harsh 2nd to 3rd shift

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Apr 8, 2018 | 11:21 AM

justcruzin125

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From: Sonora,Ca

E4od harsh 2nd to 3rd shift

I have a 1990 f250 with a e4od 4x4. Ever since i bought the truck 4 years ago its always had a harsh/delayed 2nd to 3rd shift. I have replaced the fluid and filter, mlps sensor. The truck never pulls any codes. I have even checked in side the ecu, but everything looks fine. I did realize that if i leave the battery unhooked for a while then hook it back up and take it for a drive, it wont have a harsh shift. After a few miles, then it will come back. Any thoughts?

Apr 8, 2018 | 04:32 PM

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From: Rhode Island

When you say never pulls any codes, do you mean you get code 11, or no codes at all?

Apr 8, 2018 | 05:44 PM

justcruzin125

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From: Sonora,Ca

Sorry i ment to say no trouble codes. It does send a 11 system pass code

Apr 8, 2018 | 09:09 PM

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From: Rhode Island

If its smooth after a battery disconnect, it definitely makes me think you have an electronics/computer issue somewhere. Does your check engine light work?

Apr 8, 2018 | 09:33 PM

justcruzin125

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From: Sonora,Ca

I agree with electical issue. And yes check engine light works. I did notice i have a small amount of bare wire showing just above the selonoid connector on the trans. Could that make it shift harsh but not after disconnecting the battery?

Apr 8, 2018 | 09:37 PM

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From: Rhode Island

It's possible it may be upsetting the computer. Solenoid pack harness connector failure is pretty common on these trucks. Best fix is to get a new connector and splice it in.