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Rear End Bang on Bumps

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Offline worrkshop

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Rear End Bang on Bumps
« on: November 20, 2011, 01:07:41 PM »
So I'm on the road and hit a good bump and it sounds like a loud band, almost like I bottom out, or i'm so stiff it doesn't sound good. Running everything stock except 31" tires at 30 psi. I know I'm not bottoming out. The body mounts look OK and I think the bushings at the springs look OK too. Any Ideas or is this normal??
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Offline Drone637

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Re: Rear End Bang on Bumps
« Reply #1 on: November 22, 2011, 11:34:53 PM »
How much lift are you running?  You might be hitting the bottom of your fenders.
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96 Geo Tracker, x-SJ-410,  x-White Rabbit, x-Project Trouble
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Offline BRD HNTR

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Re: Rear End Bang on Bumps
« Reply #2 on: November 25, 2011, 10:12:43 AM »
If you are running longer shocks, they can be bottoming out before you get to the bump stops.  I have that problem, and it seems harder at highway speeds and not much of a bump. 
Disconnect the bottom of a back shock, then jack up that side until you get the tire stuffed or hit bump stop, and see of you can replace the shock.
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93 Tracker,XL7 springs & 1" raised spring pads in front with YJ springs in back, home built bumpers rear & front (w/winch), 2" x 4" rock tubes,  ARB front & rear, converted Sami rear to IFS, 33x12.5x15  aluminum rims, roll cage, 2.7L w/5 speed auto.
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Offline ebattleon

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Re: Rear End Bang on Bumps
« Reply #3 on: December 16, 2011, 07:12:06 PM »
30 PSI in a Sammi with 10.5x31 tyres are way too much. I run 10 to 15 PSI with my 10.5 x 31's
The standard tyres 205/70 the PSI is like 23 psi in the front and 26 psi in the back laden.

Now with that said get a few friends and bump the Sammi to see if you can reproduce the sound
you try to locate the source.
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Common Sense Absent
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