What would cause my 2006 Ford F150 jerks while driving occasionally? on 2006 Ford F-150

It has be been driven for 121,000 miles, I keep the oil change and I have had (1) tuneup and (1) transmission service since I bought it in 2006'. The check engine signal does not come on, but it jerks while driving along occasionally. It doesn't matter how fast I'm driving. I am concern, what could be causing the problem

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1 answer
Sounds like the front differential/transfer case. Not a fun job and difficult unless you are experienced at this.