Driveline issue...Jeep bouncing

[Ianf406]

Has anyone considered or replaced the Engine and Bed body mounts? I read that they are Hydraulic and some wear out prematurely.

I feel the same baby bounce on certain surfaces especially roads that have lots of expansion joints.
Also, for those that said the frame may need support brackets, what part of the frame needs additional support? Mid section, Rear Axle forward, Rear Axle back?

I just discovered this and after inspecting mine, the rear ones on the back do show signs of past leakage. I might go talk to the dealer. I am curious if they Mojave has a different set than the Rubicon.

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[vwrob]

has anyone discovered a fix for this yet? mine does it.
i have a bunch of weight in the back and just installed

 

[Basquelander]

No solution here, but I’ve also had this issue for a little under a year. Like a child bouncing on a knee. Worst case is 30-40mph. I sometimes feel it on the interstate but overall not bad there.
I started with a 3.5” Clayton Overland lift when this started occurring.
What I’ve tried over the year;
1. I went from 35” Falken’s to 37” Nitto Trail grapplers.
2. I swapped the 3.5” triple rate Clayton front springs and 3.5 HD triple rate rear springs for MetalCloak 3.5” dual rate up front and Metalcloak 4.5” dual rate in the back. The overall ride became smoother but “bounce” was still there.
3. Installed JKS front control arm drop brackets. Ride got even smoother but bounce still there.
4. Adjusted driveline to have 2 degrees difference between pinion and driveline; same angle difference at top of driveline connections; also added a carrier drop from Rockjok.
5. Swapped the Falcon sp2 3.3’s for MetalCloak Blacks. No benefits seen.
6. Swapped the MetalCloak blacks for Radflo custom weight shock setup. No benefit seen.
7. Added Airlift 1000 rear airbags. No benefit seen.
8. This week I had all tires roadforce balanced. No benefit seen. Although RR needed over 6ounces of weight to get to spec, so i might swap that out for spare.
9. Metalcloak re-enforcement brackets all across the rear of JT.
10. Installed rear control arm relocation brackets from MetalCloak. Removed because no benefit seen.
EDIT: I also upgraded all 4 axle shafts to Chromoly shafts. This was more for strength but I thought this needed to be said. No bent axle shafts.

I’m sure I’m forgetting something but you can see the amount of money thrown at this issue.
Only thing I haven’t swapped are the wheels.
I do believe it is a weight issue. I ran the Jeep to Utah without anything in the bed and didn’t notice the bounce.
My setup might look heavy but it isn’t. I had the same issue with an RTT and bed rack. Just a little weight in the bed starts the issue. Crazy.
I hope someone has found the holy grail of fixing this. Other than selling the jeep. Ha
Thanks
Ben

 

[vwrob]

i bought my gladiator when it was a year old back in 2022. it came with patriot 37”x13.5” tires on 17” method MR305NV wheels and a 4.5” skyjacker lift. i had to fly to it and drive 1488kms (930mile) back home. i didnt notice any bounce at all. i fitted an Alu-Cab canopy camper, goose gear cabinets and rear seat delete for a cooler and then kitted it out with everything from propane tanks to water heaters. The weight definitely seemed to be the issue. a month ago i added AEV 3.5” HD springs and falcon 3.3 adjustable shocks, the bounce was still there. i had beads in the tires so i had them removed 1/2 way through a 1300km weekend trip and still no change. the beads ranged from 6.5 oz to 9.5oz (seemed excessive). last week i bought 37”x12.5 nitto trail grapplers (124Q 8ply). drove for 500kms (320 miles) last night and i noticed a 12db noise reduction and a the bounce is almost gone. before at 50km/h and 90km/h it was unbearable but not its noticeable but at least 75% better.
same weight inside the bed as always. i’ll update as i travel a bit more

 

[Basquelander]

i bought my gladiator when it was a year old back in 2022. it came with patriot 37”x13.5” tires on 17” method MR305NV wheels and a 4.5” skyjacker lift. i had to fly to it and drive 1488kms (930mile) back home. i didnt notice any bounce at all. i fitted an Alu-Cab canopy camper, goose gear cabinets and rear seat delete for a cooler and then kitted it out with everything from propane tanks to water heaters. The weight definitely seemed to be the issue. a month ago i added AEV 3.5” HD springs and falcon 3.3 adjustable shocks, the bounce was still there. i had beads in the tires so i had them removed 1/2 way through a 1300km weekend trip and still no change. the beads ranged from 6.5 oz to 9.5oz (seemed excessive). last week i bought 37”x12.5 nitto trail grapplers (124Q 8ply). drove for 500kms (320 miles) last night and i noticed a 12db noise reduction and a the bounce is almost gone. before at 50km/h and 90km/h it was unbearable but not its noticeable but at least 75% better.
same weight inside the bed as always. i’ll update as i travel a bit more

Good luck! If I find a solution I’ll be sure to post it as well.
Hopefully somebody can reply with their resolution.

by the way, I’ve had 5 jeeps. This is my first Gladiator but I’ve had several wrangler models. I know how a jeep drives and this is not it.
My buddy has a Gladiator with 4” terraflex lift, 37s, fox performance elite 2.5 shocks, same weight as I do. He has no bounce.

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