Erratic / harsh shifting

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Simsy

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Ive had a problem with harsh down shifting (clunk from 2nd to 1st mostly) my 09 expedition since I bought it a year ago . I’m wondering if there is there a bad ground somewhere causing the harsh downshift ? If so where do I start looking ? I also occasionally get the wrench light and it gets stuck in 1st gear as well as delayed engaging into gear . Sometimes I gotta give it gas and it slams into gear .
 

Yupster Dog

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Thank you for the help and knowledge
Well it would have been better than (what seems like) sarcasm when you are trying to get help.
Get codes it is putting up for the wrench light. post them.
Can you post the clunking noise?
Any more history on truck?
Have you checked transmission fluid?
More info here may bring someone who knows about it.
 
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Simsy

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I have code p0741 after the wrench light popped up the other day . Unknown on trans fluid last change and have not checked it . The truck has 199k miles . Thank you all in advance for the assistance
 
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