Bump Feel When Stopping
Record Breaker
Joined: Apr 2010
Posts: 1,387
Likes: 1
From: MN
Its the gas tank. Got the bulletin from the dealer and tested it out. Full tank no bump, 3/4 tank to 1/2 tank, bump, under 1/2 tank it goes away again. Been through 6 tanks and I can almost time it on the gas gauge now. Its especially more noticable if you have the 32 gallon tank.
Rob
Rookie
Joined: Jan 2011
Posts: 74
Likes: 0
Gonna have to call BS on that detail from the dealer VRunner. No matter how full/empty my tank is I feel the bump and watch my RPM's drop. Should it be a fuel level issue I would then assume it's starving the pump thus dropping the RPM's. But to your point, under a half tank and it goes away would not support that. I'm still thinking it's a TC issue. Now how do I get my dealer to look into it.
Captain
Joined: May 2009
Posts: 731
Likes: 1
From: Louisiana
Gonna have to call BS on that detail from the dealer VRunner. No matter how full/empty my tank is I feel the bump and watch my RPM's drop. Should it be a fuel level issue I would then assume it's starving the pump thus dropping the RPM's. But to your point, under a half tank and it goes away would not support that. I'm still thinking it's a TC issue. Now how do I get my dealer to look into it.
Site Moderator
Joined: May 2008
Posts: 9,657
Likes: 24
From: Louisville, Ky
Gonna have to call BS on that detail from the dealer VRunner. No matter how full/empty my tank is I feel the bump and watch my RPM's drop. Should it be a fuel level issue I would then assume it's starving the pump thus dropping the RPM's. But to your point, under a half tank and it goes away would not support that. I'm still thinking it's a TC issue. Now how do I get my dealer to look into it.
Veteran
Joined: Dec 2010
Posts: 422
Likes: 0
From: North Aurora, Il - 40 miles west of Chicago
I just got back from a 1,000 ride, pulling a boat ---- and exactly what I found.
When stopping with above 3/4 to a half tank, bumps almost every time. Below a half tank, it goes away. When full, or only down a few (1-6) gallons, it doesn't do it either.
2011 Laramie CC, 34 gal tank.
p.s. Boat weighs about a ton, plus about 850# in the bed, and averaged 15.9 MPG, not exceeding the speed limit.
When stopping with above 3/4 to a half tank, bumps almost every time. Below a half tank, it goes away. When full, or only down a few (1-6) gallons, it doesn't do it either.
2011 Laramie CC, 34 gal tank.
p.s. Boat weighs about a ton, plus about 850# in the bed, and averaged 15.9 MPG, not exceeding the speed limit.
Record Breaker
Joined: Apr 2010
Posts: 1,387
Likes: 1
From: MN
I just got back from a 1,000 ride, pulling a boat ---- and exactly what I found.
When stopping with above 3/4 to a half tank, bumps almost every time. Below a half tank, it goes away. When full, or only down a few (1-6) gallons, it doesn't do it either.
2011 Laramie CC, 34 gal tank.
p.s. Boat weighs about a ton, plus about 850# in the bed, and averaged 15.9 MPG, not exceeding the speed limit.
When stopping with above 3/4 to a half tank, bumps almost every time. Below a half tank, it goes away. When full, or only down a few (1-6) gallons, it doesn't do it either.
2011 Laramie CC, 34 gal tank.
p.s. Boat weighs about a ton, plus about 850# in the bed, and averaged 15.9 MPG, not exceeding the speed limit.
There do seem to be several issues that people have going on. The fuel tank one is very obvious once you start looking for it. If someone has another mystery 'bump' and it doesn't correlate to fuel level, or it involves RPM changes, it is something else. I know on our Grand Cherokee with the same Hemi and transmission it had a very rare stop bump that felt like someone hit you from behind. It was way more intense than the fuel tank bump. Seems likely the RAM could be afflicted with the same transmission issue too.
Rob
I just got back from a 1,000 ride, pulling a boat ---- and exactly what I found.
When stopping with above 3/4 to a half tank, bumps almost every time. Below a half tank, it goes away. When full, or only down a few (1-6) gallons, it doesn't do it either.
2011 Laramie CC, 34 gal tank.
p.s. Boat weighs about a ton, plus about 850# in the bed, and averaged 15.9 MPG, not exceeding the speed limit.
When stopping with above 3/4 to a half tank, bumps almost every time. Below a half tank, it goes away. When full, or only down a few (1-6) gallons, it doesn't do it either.
2011 Laramie CC, 34 gal tank.
p.s. Boat weighs about a ton, plus about 850# in the bed, and averaged 15.9 MPG, not exceeding the speed limit.
