Ok so I've done my searching and yet haven't quite found and answer to my particular questions..

My Problem:
It feels to me as if "something" is bottoming out a bit to soon (or maybe too late) in the front end under heavy articulation while disconnect.

We took the rig out for the first time yesterday after installing a new set of Rancho 9000xl's (29 front 30 rear) set at 4 front 5 rear
My lift is a simple Rough Country 2.5 Series ii budget boost on stock coils. Wheels are stock sr-a's. JKS dicso's.

The first time out after installing the lift under full flex I had zero issues.
Yesterday (first time out on new Rancho's) we felt a very odd "limitation" or "bump" feeling in the front end a couple times under heavy flex.

My first thought was we were sitting it on the bump stops.
My second after visually inspecting the bump stops and not noticing where any type of dirt or mud clumps had been pinched between the stop and axle, was that the shocks must have bottomed out.


I guess I'm kind of confused here as I was having no issues before installing the shocks

Do I need different bump stops even on stock wheels with these shocks?
Is it possible that the new shocks are bottoming out before reaching the bump stops?

My logic is that since the new shocks are softer and longer, they are allowing for more articulation at a faster rate than the stock shocks which is why I'm noticing this now.. Is that wrong?

I love these new shocks, just wondering if anyone else has noticed something similar and could add some input

 

Flex it out and see what's bottoming first. If the shocks are longer it's very well possible they're bottoming out which will damage them.

 

The 29 & 30's should be the correct length for my 2.5 though. If no one else has had a problem with them on 2.5 its hard for me to believe they would be the cause.

My bigger question is, should I be on the bumps at this point or not?

 

if youre on stock bumpstops, youre probably bottoming out your new, longer shocks.

 

Did you have shock extensions with the RC lift? If so did you remove them?

 

Yes shock extentions were needed for the stock shocks

No shock extentions should be needed on the Ranchos

 

on stock tires tho?

 

Tires don't change this, the shock will still over compress without the proper bump/shock length combo.

 

Did you compare the length of the stock shock with the extensions vs the new rancho shock? I looked at the components included with your lift and it seems that bump stop extensions aren't included. I'm guessing your new shocks have a bit more of length (extended) than the stock ones, and you're bottoming out the shocks since it flexes more and the opposite side is compressing more.

Btw would you recommend those shocks to other people with a BB lift? I have a teraflex bb and have been thinking of trying those same shocks. Was there a big difference in suspension feel?

 

Measure the amount of piston exposed on the shock and compare to the amount of distance between the bump stop cup (minus the foam jounce bumper) and axle pad.