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Transmission? Need help

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Old Oct 19, 2022 | 02:11 PM
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tbev
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Transmission? Need help

My transmission feels to be slipping,but my wife never did nothing to engine at all.. I replace spark plugs and coils,but also realize the transmission screen never been change or fluid I can’t pass 50 also takes a while to accelate to 50 mph..Should I change the fluid and screen maybe it will work better or is the tranny shot? 5.4 2004 XLT with 261,000 miles please help..Other car was totaled so I’m on my last leg 🙏🏽
 
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Old Oct 19, 2022 | 02:22 PM
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Have you checked for codes?
 
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Old Oct 20, 2022 | 05:18 AM
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Do the engine RPMs rev high without speed increasing? If yes, then that is transmission slip. If no, then that is lack of power.

If lack of power, then that could be many things. Is the check engine light on?
 
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Old Oct 27, 2022 | 11:26 AM
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She never flushed the tranny,should that help?! It’s not electrical

Should I change atf flush it out? I was told that might not be a good resolution,then told to do it 3 times?!
 
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Old Oct 27, 2022 | 11:29 AM
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It take forever to get to 50mph yes engine light been on for a few years

Originally Posted by broncoholic
Do the engine RPMs rev high without speed increasing? If yes, then that is transmission slip. If no, then that is lack of power.

If lack of power, then that could be many things. Is the check engine light on?
engine light on for years,yes it must be the slipping but flushing transmission should help right
 
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Old Oct 27, 2022 | 11:50 AM
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Originally Posted by tbev
engine light on for years,yes it must be the slipping but flushing transmission should help right
Go to an auto parts store and ask if they can read your check engine light. Your truck has been telling you something is wrong for years. It could be related, it could be unrelated.

I can't advise if a fluid flush will help this situation.
 
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