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Powerboost - Clunk When Putting in Reverse

Jerome10

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Jun 1, 2023
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North Idaho
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Powerboost
My truck has always done this sometimes but I kinda feel like it might be getting worse.

Maybe 50% of the time when I put the truck in reverse I get a loud clunk or thunk. Doesn’t seem to matter if I’m in drive to reverse or park to reverse.

I can’t really tell if it is the transmission or maybe the rear differential? Feels like a lot of slack gets taken up with a big jolt.

Is this somewhat common? A Powerboost “feature”?

I think I’m gonna grease the slip yoke splines one weekend to see if it might help.

Just wondering if this is normal or a problem. Like I said it isn’t all the time. Sorta like how my trans will shift smoothly but not all the time. Just seems random.
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