Noise from suspension(?) help

[jc99]

Not much attention. I’m going to try the day star isolator

Did the isolator stop the bowing and spring hitting the shock?

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[Cbriggs9742]

Did the isolator stop the bowing and spring hitting the shock?

My spring was hitting my bump stop. I tried the isolator, rotating springs, and a few others things with no luck. I got sick of dealing with it and went with the Clayton 2.5’’ springs and haven’t had anymore issues.

 

[Blackjeepjk]

Did the isolator stop the bowing and spring hitting the shock?

yes it worked on mine. Mine was bowed and hitting shock only on right side. Now straight. Haven’t wheeled hard since though.

 

[jc99]

yes it worked on mine. Mine was bowed and hitting shock only on right side. Now straight. Haven’t wheeled hard since though.

Thanks for letting me know. What brand and height of lift are you using? I have an EVO 4.5 on a 2021 JT Rubicon Diesel so I'll have to give the isolators a try. Here is a pic of how bad my bowing is.

 

[Blackjeepjk]

Thanks for letting me know. What brand and height of lift are you using? I have an EVO 4.5 on a 2021 JT Rubicon Diesel so I'll have to give the isolators a try. Here is a pic of how bad my bowing is.

I think I have the exact same lift/shocks set up as you. Evo 4.5 and kings.
your picture of spring bow was exactly how mine was back against the shock.

 

[jc99]

I think I have the exact same lift/shocks set up as you. Evo 4.5 and kings.
your picture of spring bow was exactly how mine was back against the shock.

Cool... hopefully the isolators will help me as well. I added the Rancho drop brackets since my lift didn't have the EVO overland ones and the Ranchos were readily available. The Rancho brackets seem to push the frame side control arm mounting holes (upper and lower) a bit more forward then the EVO overland ones (at least what I can tell from other pictures online). I had to set my EVO upper control arms to their shortest possible setting. Currently I am at 7.5 degree caster and it drives excellent however then I noticed going over speed bumps a clunk which looks to be the result of the bowed coils, likely contacting the shocks. I'll shorten the lower control arms a turn or 2 and get the caster back to 6-6.5 and try the isolators and see how things are after those changes.

You have drop brackets? Any idea what your caster is at?

 

[OHJeeper]

Thanks for letting me know. What brand and height of lift are you using? I have an EVO 4.5 on a 2021 JT Rubicon Diesel so I'll have to give the isolators a try. Here is a pic of how bad my bowing is.

Have you looked at adjustable UCA's? Looks to me that your lift is pushing the pinion angle pretty far down... UCA's could help.

EDIT: you posted your comment right before I hit "Save" on mine... I think pulling the LCA's back or pushing the UCA's forward (or both) to correct caster would be your best bet. That bowing looks like a lot more than 7.5°, but it's only one pic so I could be wrong.

 

[jc99]

I'll need to play with it, like I said it drives like a dream compared to before, no wander at all and bumps in the road aren't jarring anymore to people in the vehicle. The fact the coils are so bowed is causing the front to drop in height a bit as well so possibly skewing the caster measurements. The bowing as well might be making it ride softer since all the force isn't going up the coil, not sure on this.

I'm using a digital gauge perpendicular to the rim to measure the caster using the wheel turning method (20 degrees left then right) on a pretty well level garage floor. I'll have to check the caster against the front flat surfaces on the pinion as well, forgot to do that when I was checking it yesterday.

I haven't pulled the tire yet either to see how centered the axle is under the upper spring perch, however I did adjust the lower control arm position pre and post installing the drop brackets (measuring from a point on the frame to point on the axle). Once I do that I be able to tell if I should shorten the lower or extend the uppers to reduce the caster.

 

[jc99]

Got the wheels off and can see I do have the axle pushed forward a bit which is adding to the bowing of the springs. I was able to quickly reduce the caster using the additional upper holes in the Rancho frame side drop backets (moved to the highest hole). Doing this extended the upper control arms so pushed the top of the axle forward,. It had a dramatic effect on the spring bowing, looks much better now. Went from 7.5+ degrees of caster back to 6ish but still drives well.

This weekend I'll shorten the lowers and put the uppers back to the old location which will let me keep the 6's degrees of caster I am at now and pull the axle back at the same time which should resolve the rest of the bowing.

I did notice some outward bowing and after looking at the factory lower spring isolator, I can see they are deforming so I'll need to get the upgraded Rancho/Daystart/Metal cloak ones to help with that.

 

[AjMac]

I am running EVO’s 2.5 Overland Enforcer Lift with 3/4 daystar spacers and falcon shocks. I hear a “clunking” or grinding type sound occasionally when there is some type of angular momentum put on the front suspension. (If that makes any sense) It sounds like it is coming from the front passenger side of the Jeep. I hear it if I am pulling into a steep driveway, or when offroad, if there is a small dip and I am traveling a couple of mph, it will grind (or clunk). I don’t hear it with suspension travel that is straight up or down. I can have a large person jump up on the bumper and cant reproduce the sound.

The shop confirmed that everything is torqued to spec, and they couldn’t see anything that was rubbing or making contact. Other than the sound, it drives perfect.

I attached a pic of my front right spring, is this amount of bowing normal?

Any ideas? I appreciate any help!

I just installed my lift, and experienced this too...except for a much dumber reason.

I didnt realize my EVO rear springs were for a JL, so they didnt seat correctly. This cause the springs to compress outward instead of straight down, bonking on the frame and whatever else was around it.

Same symptoms as you, and could also be reproduced. One thing I saw when installing my fronts, though, was to remove the bottom isolator...which I cant tell if you did or not in that picture.

I would try to make sure the spring was seated correctly, and remove the bottom isolator if it's there, and see if that is throwing it out of whack.

EDIT: I am using stock top isolators and no bottom.

 

[jc99]

Got the wheels off and can see I do have the axle pushed forward a bit which is adding to the bowing of the springs. I was able to quickly reduce the caster using the additional upper holes in the Rancho frame side drop backets (moved to the highest hole). Doing this extended the upper control arms so pushed the top of the axle forward,. It had a dramatic effect on the spring bowing, looks much better now. Went from 7.5+ degrees of caster back to 6ish but still drives well.

This weekend I'll shorten the lowers and put the uppers back to the old location which will let me keep the 6's degrees of caster I am at now and pull the axle back at the same time which should resolve the rest of the bowing.

I did notice some outward bowing and after looking at the factory lower spring isolator, I can see they are deforming so I'll need to get the upgraded Rancho/Daystart/Metal cloak ones to help with that.

Got the Rancho front lower spring isolators and put them in today, huge difference, removed the bowing to the sides and back towards the shocks.

 

[jc99]

Got the Rancho front lower spring isolators and put them in today, huge difference, removed the bowing to the sides and back towards the shocks.

Originally my issue was front springs bowing backwards with the passenger side being the worst and hitting the King 2.5 shock bodies.

After installing the Rancho lower isolators, the shocks aren't getting hit anymore however the springs are now tapping the frame (mostly driver side) and also the inside of the spring is tapping the outboard side of the bump stop bucket inside the spring. Springs are bowing in now with the drivers side being the worst.

I have metal cloak lower isolators on order to see if they are any different then the Ranchos.

If not might have to try with the original factory ones again now that I have the Metal cloak lower shock relocation brackets installed. EVO said to get a second drivers side lower isolator and put two of them in.

 

[jc99]

Still having issues with my front coil bowing and springs clanking on the bump stop mount and frame when the front end is twisted up and hits bumps.

Started another thread to see if any one has tried Fabtec's lower isolator kit with a guide to redrill the holes for the upper isolator so you can spin the upper isolator.

https://www.jeepgladiatorforum.com/...ntial-fix-fabtech-template-to-spin-the.63109/

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