- Location
- Bountiful, land of rocks
I’ve noticed it even in my ‘98 Cummins long bed extended cab just as you come down the hill from the overpass over the train tracks southbound on i15. Don’t notice it on the CCSB
The I-15 bounce!
- Thread starter jeeper
- Start date
Cascadia
Undecided
- Location
- Orem, Utah
Never experienced it in any of my gmc 3500’s. A regular bed, long bed, and dually.
- Location
- Grantsville, Utah
After seeing Glockmans mod and the previous link with all of the animations, I can totally understand how the frame is flexing on the long bed trucks and causing the bounce. If I still had my long bed, I would be in the garage building a crossmember immediately.
Great work, gentlemen!
Great work, gentlemen!
I added some rancho adjustable shocks front and rear about a year ago, and thought I had solved my bounce for the most part. It was really neat to be able to make an adjustment and see the immediate change in the was the truck handled.
However, a few weeks ago one of the Hankooks on my truck separated a belt and bulged. I replaced them all with a set of Cooper ATP’s. Immediately after while diving home, I had the worst bounce ever, and it was just on the surface streets near my house.
I guess I could have thought it through, but I didn’t think tires would make such a big difference.
However, a few weeks ago one of the Hankooks on my truck separated a belt and bulged. I replaced them all with a set of Cooper ATP’s. Immediately after while diving home, I had the worst bounce ever, and it was just on the surface streets near my house.
I guess I could have thought it through, but I didn’t think tires would make such a big difference.
Tonkaman
Well-Known Member
- Location
- West Jordan
So you think it’s the ATP’s??
- Location
- Bountiful, land of rocks
Coopers..... I’d attribute any drivability problems to those. Never any luck with the 2or 3 sets I’ve bought when buying a car.
- Location
- Grantsville, Utah
Did you check the air pressure? Do both sets of tires have the same load rating? I've had great results with all of the Cooper tires I've had, but they were all truck tires.
This will be my 3rd or 4th set of the ATP's and I've been happy with all but the smaller light-duty set I put on the colorado a while back, and that's because they wore out quicker than I thought they should. traction, ride, and noise level have all seemed good with them.
I changed air pressure from 70 down to 60, and it didn't make a big difference, then went up to 80psi to get my sensor alarms to shut off.
I played with the adjustments on my shocks a little today, and going 2 clicks softer seemed to get rid of most of the hop.. but every time I was in the truck it had a different load in the trailer or bed.. so not really good comparisons. I will keep playing with it. I am not concerned.. I was just surprised at how BIG of a difference it made from the tire change
I changed air pressure from 70 down to 60, and it didn't make a big difference, then went up to 80psi to get my sensor alarms to shut off.
I played with the adjustments on my shocks a little today, and going 2 clicks softer seemed to get rid of most of the hop.. but every time I was in the truck it had a different load in the trailer or bed.. so not really good comparisons. I will keep playing with it. I am not concerned.. I was just surprised at how BIG of a difference it made from the tire change
kmboren
Recovering XJ owner anonymous
- Location
- Southern Utah
When I bought my slide in camper in West point I experienced the bounce for the first time going south bound with the camper loaded. My wife asked what It was. Thanks to thos thread I was able to answer her question.
- Location
- Bountiful, land of rocks
Just thought of this thread this morning. Had a southbound newer Tundra come past me just as you come down from the railroad overpass just before the Warm Springs Rd exit this morning. That looked pretty uncomfortable but the lady driving it just seemed to treat it as normal?
Spork
Tin Foil Hat Equipped
- Location
- Saratoga Springs, UT
Screams resonance
Spork
Tin Foil Hat Equipped
- Location
- Saratoga Springs, UT
Thinking those that have added a cross member have changed the vehicle enough to get out of the affected frequency. My VW has issues on California Ave in salt lake, the seams make it start bouncing around 30-40.
RockChucker
Well-Known Member
- Location
- Highland
I think EVERY vehicle has problems on California Ave. That road is the worst. I've been wanting to add a new cross member on my truck right at the front spring hanger for the rear springs. I think the outside spring mount creates a moment on the frame rail that is magnified by the fact that my truck's frame isn't fully boxed.
- Location
- Grantsville, Utah
California could be a decent offroad race course.
Your description of the frame issue is the most plausible to me. Fitting a crossmember in that area on the bottom of the frame looks like a difficult task. Between the exhaust and driveline, there is a bunch of crap in the way. A crossmember on top of the frame might be easier, even with pulling the bed off.
Yep. My 2012 does not look reasonable to add one here.
And looking at the inside of the frame/spring hanger, there is already a cross member there, so adding one on top of the frame wouldn't be worth it, probably?
glockman
I hate Jeep trucks
- Location
- Pleasant Grove
If you look back at the model I posted a few pages back, it's the bottom of the unboxed frame bowing out/away. I have a B&W gooseneck hitch also bolted to the top of the frame and it made no difference. The crossmember at the bottom, tying the bottom together made a noticeable difference.
I bet it would be easier to box the frame than build a cross member back in that area. There is a picture somewhere of a guy "boxing" the frame in a lattice pattern using 1" strap.
I bet it would be easier to box the frame than build a cross member back in that area. There is a picture somewhere of a guy "boxing" the frame in a lattice pattern using 1" strap.