Bump during acceleration

Express SN95 · Mar 25, 2017

Hey guys figured id post this here. I recently just picked up a 2016 Outdoorsman with the 32 gal. fuel tank. I've never personally had the 32 gal. tank before and i've read how people have had issues feeling a bump when coming to a stop. I've noticed that upon accelerating I get a feeling almost like something is sliding in the bed and then bumps the tailgate. Obviously there is nothing in the bed to create this feeling and it only happens sometimes during acceleration. The fuel level has been between 3/4 and almost full when it has done it. Has anyone else had this issue and was it the 32 gal. tank?

kltk1 · Mar 25, 2017

I get a distinct bump when coming to a stop, never on acceleration. I just assumed it was the transmission shifting down. I have a Pentastar V6 with the 8 speed transmission and 26 gallon tank.

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TRCM · Mar 25, 2017

It is the fuel tank.

No baffles in the 32 gal tank, and fuel when between 5/8 & full can easily move around when stopping or starting, which is felt when it hits the forward or aft wall of the tank as a bump or jolt.

If it moves when stopping, it will also move when taking off, but the only times I've felt it taking off was when I took off hard..... maybe you should slow down some ???

LOL

Express SN95 · Mar 25, 2017

Haha I really don't accelerate fast and I haven't felt the bump coming to a stop. I would say it happens upon moderate acceleration. It really doesn't do it if I ease in to the throttle.

AtomicDog · Mar 26, 2017

Ahhh I am reminded of my '12 with 32 gal tank. I don't miss the "bump." It is the exact reason I avoided a 32 gal when I got my 17. The bigger tank is nice for sure, but that bump made me crazy.

Markcuda · Mar 26, 2017

Just carry less gas when driving :hidesbehindsofa:

ColdCase · Mar 26, 2017

Probably the tank, but a few 8 speeds have a tendency to bump when accelerating lightly or coming to a stop, most noticeable before there is 500-1000 miles on it. Mine bumps on rare occasions when cold, and I have a standard tank.

Jetsfan122 · Mar 27, 2017

I have the 32 gal tank and have never noticed a bump . I'll have to pay attention for it.

Express SN95 · Apr 10, 2017

Well I think I figured it out. Once I got below 3/4 of a tank I didnt feel the bump anymore. Refilled today and I noticed it, so it looks like its the fuel sloshing.

TRCM · Apr 10, 2017

On mine, the 5/8 - 7/8 seems to be the tank level it's most noticeable at

Bump during acceleration

Express SN95

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kltk1

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TRCM

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Express SN95

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AtomicDog

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Markcuda

Senior Member

ColdCase

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Jetsfan122

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Express SN95

Senior Member

TRCM

USN, Retired

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