4x4 noises
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Senior User
Joined: Jun 2012
Posts: 239
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From: allen park, mi
4x4 noises
2009 f350 cc lb. v10. manual hubs and manual 4x4. when I put it into 4x4 high everything seems fine. but when I let off the gas and it decelerates it makes like a weird hum. I has just checkin it out and getting ready for winter. was on a long straight road so I put it in 4hi for a minute to check things out. kinda did it last year too but seems worse this year
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Senior User
Joined: Jun 2012
Posts: 239
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From: allen park, mi
fluid was dirty. bought the motorcraft transfer case fluid, and put it in. still makes the noise. when I let off the gas, it almost sounds like when you slow down a car by putting it in a lower gear. my mechanics buddy is going to open up front dif, change fluid and do an inspection
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Joined: Aug 2008
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From: Frederick, MD
keep at it. You will find if something needs rebuilt.
Normally you service the front diff around 100K miles as well. Unless it has been contaminated
Normally you service the front diff around 100K miles as well. Unless it has been contaminated
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Thread Starter
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Senior User
Joined: Jun 2012
Posts: 239
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From: allen park, mi
Ok. mechanics buddy checked it out. Said its common to be a little loud on dry pavement. Opened front dif. Said looks like work was previously done. Everything looked good. Just swapped fluid. Hope hes right
Senior User
Joined: Nov 2012
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From: Foresthill, CA
Yes,your mechanics buddy is correct. These 4WD units are not meant to be driven on hard dry surfaces. They will make more noise than normal and if turned tightly will bind up the transfer case. They need some tire slippage to operate properly.
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Joined: Mar 2014
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From: north east Ohio
My last 4 trucks were manual hubs. All bought new. They all wined a little at speeds higher than 30 or so. I have buddies that have said they have gone 70 mph in 4 wheel (all esof)and I could never imagine going that fast in 4 wheel drive. My new truck has esof, it will be interesting to see how it sounds at speed. I believe yours is normal. If we ever get any fricken snow, Almost 10,000 miles and no snow to speak of. Must be because of the new plow.