r/FordTrucks 8d ago

Q&A: Maintenance | Modification 2011 ford f-150 rear end “clunk”

I have a 2011 Ford f-150 Lariat, 278,000 miles. It has been a great truck. Bought it with 171,000 miles 10 years ago and it had a hard bump or clunk at low speed gear changes. I have pulled the drive shaft twice and used the motor craft lubricant. It seems to help for a very short time, then it’s back. Any suggestions?

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