cgp4312

I have a 2006 f150 5.4 and when I put it in 4wd It knocks really loud when it first kicks in it doesn't matter weather im moving or stopped once I start moving again it always knocks is this normal or is there something I should check before winter hits it works fine otherwise thanks

lariatboy

Normal. Check your front diff mounts - they tend to loosen up.

techrep

iTrader: (1)

what do you mean by knocks...is it grinding while you drive...a clunk when engaging is normal...but a continued noise while driving is not normal...I would look at your IWE solenoid and air lines to you hubs...

cgp4312

It just makes one loud clunk when engaginging

jb3nny

what happened i am curious as i am in a similar situation.