Mechanics

QUICK CLUNK SOUND COMING FROM THE FRONT HALF OF MY TRUCK...

2000 Ford F-150 • 163,200 miles

Ok. So 2000 f150, 5.4L V8 4x4. I have a clunking sound coming from the front half. I can give a quick and moderate thrust on the gas, then clunk but more of a pop sound. That's when im in reverse. Also going over pot holes, depending on the size, its not to bad. But there's a stop sign I stop at everday, and there's chewed up pavement as you take a right. And good lord, when Im slowly gassing it through, it sounds like somethings about to snap. That brings me to my theory that it could be my transfer case or front diff. Now I spun the front driveshaft on a '98 & I think an '02. Both spun freely, like 5 complete turns worth. Mine does like 1/8 or something like that, then stops. That's in both directions. I didnt install any hub-lockers on my truck and neither did my 2 friends on their trucks. What's the deal? Is it the trans case, front/rear diff, transmission. I think I know its not anything suspension because when happens, I feel a very slight tap on the manual t-case shift lever. I looked it up and have a borg-warner 44-06 (t-case), took it off I think a navigator from a scrap yard, and stripped all the parts out that tcase. Only problem is, its an electric shift model. Mine's a manual. Just need to know what you think about my whole predicament. Any questions/answers email: thomas. Savard@aol. Com


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MmMcrockeyMmM
February 24, 2012.



Sounds like a motor mount, tranny mount or transfer case bushing or mounts is failed. You can check this by putting the parking brake on with the hood open and give it some gas to see if the engine moves, it should only move a few inches, and if it makes the clunking noise. If it does not make the noise while sitting wtill it is probably suspension related such as a bushing or a ball joint.
Either way both will do some damage if not attended to quickly.