is my transmission on the way out?
1999 F150, 5.4, 4sp tows fine I was driving without the trailer and noticed at around 45 mpt, it felt like I was under power for short moments, then off power for short moments, then under power...
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X 2 on the converter lock up. Very common around 45 MPH on many vehicles. But it's normal IMHO. Keep the regular maintenance going and don't worry about it.
