loud clunk when going into 4wd
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From: GRAFTON WV
loud clunk when going into 4wd
well it snowed for the first time since i got my 03 explorer -- while doing some running around today i noticed that when it kicked into 4wd it made a loud clunk on what seemed like the drivers side -- any thoughts ??
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From: GRAFTON WV
yeah i don't know much about em either -- i'm more old school 4wd -- i'm gonna have it checked out -- it's pretty "violent" when it kicks in -- i figured somebody here may have experienced it before
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From: Nebraska
Are you putting into 4wd right off the bat when you start it up? if so the grease might not be warmed up enough for your hubs to engaged smoothly. In cold weather the grease is gonna be like thick mollases. If you drive it a few blocks first then engage the 4wd you shouldn't have a problem.
Post Fiend
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From: North of Salt Lake City
My 4wd engages without much of a sound. If your rear wheels are spinning when you turn the switch it will indeed make a loud clunk. But that's only if the rear wheels are spinning faster than the front wheels. If all wheels are turning the same speed (including stopped), the 4wd should engage without much noise.
Remember that the 4lo will always clunk when you engage that.
Remember that the 4lo will always clunk when you engage that.
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From: GRAFTON WV
i'm not doing anything it does it by itself -- it has a button for auto 4wd - hi 4wd - lo 4wd -- all i was doing was turning in driveway and bang the frontend kicked in and it was loud and violent -- i hadn't pushed any of the 4wd buttons
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I have auto 4 on a 2001 4.0.... Its rear wheel drive and when it feels the rear wheels slip then it kicks in the front wheels to make 4wd. I read somewhere that this is normal and my clunck is also a loud clunk. remeber its only auto 4 not full time 4.
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From: GRAFTON WV
Originally Posted by freesplorer
I have auto 4 on a 2001 4.0.... Its rear wheel drive and when it feels the rear wheels slip then it kicks in the front wheels to make 4wd. I read somewhere that this is normal and my clunck is also a loud clunk. remeber its only auto 4 not full time 4.
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From: Toronto
I think Freesplorer nailed it. The V8 versions are full-time All Wheel Drive. All others (4.0 L V6) are Rear-Wheel Drive only, until you select 4WD HI or LO - OR - the rear wheels start to slip/spin on snow or ice, then it automatically 'kicks' into 4WD. The 'kick' can be a thump, bump, bang, or whammo, depending how much you are on the gas when it engages. Mine (1998) does the same. I was suprised the first few times it happened also. Apparently there is a wire you can cut to stop this from happening automatically.. then install a switch so you decide if/when you want it to kick in.. I'm thinking about doing this..
Post Fiend
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From: North of Salt Lake City
I have a 4.0L v6 and didn't know the 4wd system between mine and a v8 would be different. Interesting because Ford engineers probably thought that the power of the v8 would be plenty to handle the overhead of an AWD system. My 99 Expedition has the same setup. The default setting is that approximately 90% of the power goes to the rear wheels and 10% all the time. When I switch to 4X4 HI it locks the front and back wheels to 50% each. The trouble with the AWD setting is that I'm always running power to the front wheels which I only rarely need. That just means extra wear and waste of power is going on. I've always wished I could have the option to switch off the AWD and just run pure 2wd in the rear. I'm sure I'd get much better gas mileage with that option.
So it's interesting to know that the v8 SportTracs have the AWD system as opposed to the v6 SportTrac's 2wd system. It sounds like there is also a difference between the SportTrac AWD and the Expedition. With the Expedition constantly turning the front axles, there is no clunk when it engages full 4wd.
So it's interesting to know that the v8 SportTracs have the AWD system as opposed to the v6 SportTrac's 2wd system. It sounds like there is also a difference between the SportTrac AWD and the Expedition. With the Expedition constantly turning the front axles, there is no clunk when it engages full 4wd.
Last edited by EpicCowlick; Jan 26, 2007 at 11:50 AM.