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Drivetrain Tech General discussion of drivetrain for the Ford Ranger.

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Old 12-29-2008
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Drivetrain Problem

So about a week ago when driving in about 6 inches of snow in 4wd i would hear this very noticeable "bang/pop" sound accompanied by a large jolt. it would happen every minute or so driving in a straight line at a constant speed. it felt like the truck was loosing power momentarily. After some thought and discussion i suspected that the problem was in the T-case, possibly the chain slipping because it had stretched out. I found nothing wrong with the T-case but i have very limited knowledge of it so i took it to a specialty shop. they said everything looks fine and suspects that the problem has to be in the differentials (probably the front since it happens in 4wd). my question is, what could possibly be causing this in the differentials, or anywhere else for that matter. my best guess is that something is binding up and when it lets loose it makes the noise and jolt sensation. any help would be appreciated.
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Old 12-29-2008
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I had this same problem and it turned out that my case had some water in it. I changed it out and everything was good. But if you say a shop checked it out then maybe it is your diff. Maybe somehow you broke a tooth off.
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Old 12-29-2008
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Quote:
Originally Posted by fddriver02 View Post
I had this same problem and it turned out that my case had some water in it. I changed it out and everything was good. But if you say a shop checked it out then maybe it is your diff. Maybe somehow you broke a tooth off.
That could be it. Also don't forget to check your rear differential or did you hear the noise from up front?
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Old 12-29-2008
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if a tooth had broken off then wouldnt i hear/feel it every revolution?

the noise sounded more like it was coming from the front, plus this doesn't happen in 2wd.
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Old 12-29-2008
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My friend broke a tooth off of the ring gear on his T100 and at makes no noise or vibration. Even when in 4wd he doesn't get the "skipping" feeling.
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Old 12-29-2008
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ok, ill check my front diff first.
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Old 12-29-2008
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Problem with that one. You have to drop it to check it.
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Old 12-29-2008
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because its reverse cut?
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Old 12-29-2008
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No because of the POS design. There is not enough room to remove the cover with the diff still in the truck.
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Old 12-29-2008
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well i have a 4" superlift so i think i can block the frame and remove the front cross member to get the cover off. not sure though.
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Old 12-29-2008
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I remember someone saying they couldn't unless they loosened the mounts. I'm not sure though.
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Old 12-29-2008
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I just called the guy who installed my 4.88 gears and he said he would take a look at the diffs for free tomorrow morning so i'll just have to wait till then.
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