Truck lunges while stopped

nobrakes00

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Truck has a touch over 40k on her now and running great. Keep her well-maintained; regular oil/filter changes (full synthetic), tire rotations, air filter replacements. The one thing I haven't done is any chassis lubrication. I don't have a grease gun and judging by the manual, it states that some fittings are "maintenance free." I did have the splines lubed around 15k as I was getting an intermittent clunking sound, especially on initial acceleration.

Current issue: If I'm stopped at a light for 30 seconds to a minute or so, while idling the truck is quiet and smooth as silk, but every once in awhile, she'll clunk briefly or rather make a feel like she wants to jump forward; not dangerously hard, but enough to notice. I'm certainly not an expert, just curious what this may be caused from and what I need done? TIA!!!
 

Bigredmariner

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So even after being stopped for 30 seconds to a minute the slip yoke bind still has enough stored energy to do what he's describing?:dunno:
 

CJ Hungus

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Yep, for some stupid reason thats always when they occur. Mine would never happen when I was just coming to a stop or just after, it was always 30sec to 1 min or even longer. :dunno:
 

Sodbuster

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So even after being stopped for 30 seconds to a minute the slip yoke bind still has enough stored energy to do what he's describing?:dunno:

Yes, my truck had that problem altho I can't recall being at a stoplight for a minute... :D
 

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