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Rear leaf spring clunk gone with TSB 21-na-138 fix

Pryme
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Chuck FB Enthusiast

Chuck FB

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1 hour ago, Faffy said:

Had the shims put in yesterday.  Problem went away.  We will see how long it lasts.

 I am curious if they reused the leaf spring ubolts, if you live in a salty road climate it would be obvious but perhaps not otherwise. 

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Grumpy Bear
Grumpy Bear

Mine makes noise when it rains. Kind of like my back. Yea, I tune it out too. 

Pryme
Pryme

It’s perfectly silent now. All the places or situations that would cause creaking is now gone. Dead silent. Before, just stepping down onto the running boards would cause a creaking sound in the rear.

Pryme
Pryme

It’s back. Didn’t even last a month. Clunking and creaking by just shaking the back of the truck by hand or bouncing up and down on the hitch. Sounds like crap. So the bandaid tsb is a failure. I’ll n

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Pryme Senior Enthusiast

Pryme

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On 7/28/2026 at 2:34 PM, Faffy said:

Had the shims put in yesterday.  Problem went away.  We will see how long it lasts.

Lasted about a month for me. It’s a bandaid. The real fix is new leaf packs. Mines still quiet 

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