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Rustys shocks, rear thud
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=1&t=26347		 Page 1 of 1
Author:  Christopher [ Thu Nov 08, 2007 9:11 pm ]
Post subject:  Rustys shocks, rear thud
I have a thud in the rear when I hit a bump that seems to be from to stiff shocks. Have had it ever since I put on the rustys lift with rustys shocks. Any body else have this problem? I was thinking of replacing them with some rancho rsx's. Any thoughts?
Thanks

Chris
Author:  raceinfan [ Thu Nov 08, 2007 9:23 pm ]
Post subject: 
replace them with the Rancho's ( I did only cause I had them already ) you'll be glad you did

a few people have had issues with the Rusty's shocks here & have replaced them & never had issues again...hope this helps
Author:  Christopher [ Thu Nov 08, 2007 9:31 pm ]
Post subject: 
Thanks, thought I remember hearing that people didnt favor them.
Author:  RQuarte [ Thu Nov 08, 2007 10:04 pm ]
Post subject: 
I'll be replacing mine with OME nitros soon i hope.
Author:  slikjr [ Thu Nov 08, 2007 10:10 pm ]
Post subject: 
I would think this issue would be addressed since the new shocks were supplied with the kit... but you never know...

If you lift it, you are losing that much "upwards" travel on the shock. before I put on my ProComp's (which are 3" longer than stock) I would always top out my shocks when driving off curbs, offroading, or even just the right bump with enough rebound.

Again, hopefully they would send longer shocks with a lift but... there is my two cents.
Author:  jason thompson [ Thu Nov 08, 2007 11:05 pm ]
Post subject: 
slikjr wrote:
I would think this issue would be addressed since the new shocks were supplied with the kit... but you never know...

If you lift it, you are losing that much "upwards" travel on the shock. before I put on my ProComp's (which are 3" longer than stock) I would always top out my shocks when driving off curbs, offroading, or even just the right bump with enough rebound.

Again, hopefully they would send longer shocks with a lift but... there is my two cents.


to answer the posted question
Replace the shocks the bushings are wrong
if you get the noise to go away then the shock mount will probably be toast and then what do you have?

Now on to the quote
your OE shocks were bottoming out and the longer ones dont?
That sounds very very wrong
shocks should ONLY limit down travle up travle should be stoped by the bump stops
longer shocks = longer bump stops
Bad shocks can make noise going over bumps
useing shocks as bump stops can cause them to become bad
if your shocks are 3" longer than stock then you need at least 2.5" more bump stop or they will be bad soon
Author:  slikjr [ Sat Nov 10, 2007 12:06 am ]
Post subject: 
Hm, maybe I wrote that wrong.

If you lift your vehicle and don't change the shocks you are losing that much "upward" or extension out of them. If your shocks are say 30" fully extended, and installed on stock vehicle they sit at say 20" compressed, so with a 3" lift they will sit at 23". So, you lose the 3". Now if you drive off a curb or rock that is say 8" tall, you're axle will drop off it and the shock will "top out" because it now only has 7" of upward travel versus the 10" it had before the lift.

That said, my stock shocks would top out when driving off a curb or something because of the loss of upward travel. Your shock should be the thing that holds your axle from just hanging when drooped so that the coil spring won't just fall out!
Author:  USPLibby [ Sat Nov 10, 2007 9:23 am ]
Post subject: 
I added a 1" bump stop, hockey puck, when I lifted my Jeep. The longer shocks can bottom out with just the stock bump stop which is not good for the shocks.
Author:  jason thompson [ Sat Nov 10, 2007 10:47 am ]
Post subject: 
slikjr wrote:
Hm, maybe I wrote that wrong.

If you lift your vehicle and don't change the shocks you are losing that much "upward" or extension out of them. If your shocks are say 30" fully extended, and installed on stock vehicle they sit at say 20" compressed, so with a 3" lift they will sit at 23". So, you lose the 3". Now if you drive off a curb or rock that is say 8" tall, you're axle will drop off it and the shock will "top out" because it now only has 7" of upward travel versus the 10" it had before the lift.

That said, my stock shocks would top out when driving off a curb or something because of the loss of upward travel. Your shock should be the thing that holds your axle from just hanging when drooped so that the coil spring won't just fall out!



yes
but they still should not make noise
if you fully extend a shock that is not a problem ,make it as long as it can get
if you full compress a shock and the bumpstop does not do its job ,hold the weight of the jeep, you will destroy your shock ,I have seen them bent

the best way to know if you have enough bump stop for your shocks is to simply pull the shock and spring from 1 side of the jeep
Jack the axle untill it hits the bump stop and measure from mouning bolt to mounting bolt for the shock
subtrac about 1" from that
then compress your shock full and measure from bolt hole to bolt hole
if the compressed shock is longer than the axle/bump stop measurement you need that much bump stop
if the axle/bump stop is longer than the shock then you are OK
Author:  slikjr [ Sat Nov 10, 2007 9:44 pm ]
Post subject: 
Ah yes... I see what you are getting at now. Agreed! Longer shock will bottom out... sorry! My fault. Misunderstood what was being said. And yes, very good way to tell if you need longer bumpstops
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