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4-wheel clicking.. hard

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bwoodhouse
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Vehicle: 1998 GMC Sonoma
Joined: Jan 2009
Member # 4795
From: Seattle WA

Posted - January 8 : 12:57a

I have concern about my Electronic 4-wheel drive. When engaged and working it (accelerating or going up hill), a hard pounding sensation occurs in the transfer case region. I would normally just live with it, but with the freak snow storms in Seattle have pushed me to look further into it.

I have a thought as to when it occurred in case it makes any difference.. Last winter I got my truck submerged in snow to where the chasis was level with the snow level. As I recall, I was still in 4-wheel drive when I had a friend's family tow it out backwards with a snow cat. A family member thinks that towing it backwards while in 4-wheel may have stripped something in the transfer case, I thought I'd ask for advice from the forum before spending money on a diagnosis. Thank you!

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DrSpeed
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Posted - January 8 : 2:17a

It's not the T-case - the are pretty stout.

I bet you have some slop in your driveshaft.

I'd start by pulling off your front driveline, and dropping it off at a shop for a check up or a rebuild. Could be a bad u joint, double cardan ball, or a bent shaft.

From there, I'd check the front axle u joints as well.

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