Question about 1997 Ford Explorer AWD

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Loud clunking noise when accelerating from a stop

When i start from a stop and accelerate moderately to hard is when the clunking happenes. its a 1997 explorer limited AWD. both half shafts have been replaced within the last couple years. i can drive the car very easy and not have it pop but if it is in first or second and i mat it it will start to pop and wont stop until i let off the gas some. my dad said it could be the chain in the transfer case, is this right? if so how difficult is it to fix? i havent actually remove the u-joints and checked them but i have had that problem before and this noise is too loud to be that.

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  • Casey Chapman Jan 10, 2009

    no just the clunking

  • Casey Chapman Jan 10, 2009

    Did that with the front end while I had it jacked up last night replacing the driver side front axle because I thought that was the problem. There was some play but definitely no clunking. I don't think it's the differentials, both have been serviced recently and the rear axle is only 2 years old.

  • Casey Chapman Jan 12, 2009

    are you talking about the front differential? like i said earlier the rear differential has been replaced and serviced by ford recently. i bought the car from my father and he did a really good job of taking care of the maintainence.

  • Roberta Smith
    Roberta Smith May 11, 2010

    Jack it up so you can move each wheel back and forth... listen for a clunking sound and or watch for extra play in the components

  • Roberta Smith
    Roberta Smith May 11, 2010

    any vibration ?

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I assume that when you get the noise, the acceleration is compromised, yes?

I would tend to agree with your father. The transfer case chain may be slipping. This is a common characteristic of a "stretched" chain. I would not piddle about with the rear end/differential. If you have a bad diff, the problem would be observed all of the time, regardless of how hard or easy you accelerate. To change the chain, you need to remove the transfer case from the vehicle, remove the outputs from both sides, unbolt and seperate the case halves. The chain is then visible. Just make sure that you do not lose any small bearings, there is a lot of the flat "torrington" type bearings in it.

Posted on Jan 12, 2009

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I hate to tell you this but it soundes like it's in the differential. Take your bolts off your pumpkin and have some one rock the truck. I bet you have a lot of play and what you are hearing is the ring gear in there . It probabley has to much play in the two gears

Posted on Jan 10, 2009

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