Is there anything that can be done to reduce fish-tail action? - Page 2 - Jeep Garage - Jeep Forum

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  #13  
Old 03-20-2015, 09:46 AM
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I am probably way off base here and I know nothing much about swaybars or suspension, but could it be something in your steering? Mine feels like she jumps a bit on certain bumps but I feel it in the front end. This is mostly at highway speed. I attribute mine to the super tight steering on the rig so when I hit a bump she dances sideways a bit. That could make the rear end sway a bit too.

Sounds like your issue is at slower speeds?

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  #14  
Old 03-20-2015, 11:52 AM
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Re: Is there anything that can be done to reduce fish-tail action?

I'd say from 35mph on up.
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  #15  
Old 03-20-2015, 11:59 AM
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Re: Is there anything that can be done to reduce fish-tail action?

Quote:
Originally Posted by Nonstop View Post
So let me get this straight, the problem so far is a Jeep that primarily from one side and under specific conditions jumps out or wiggles a bit.. So far the advice is to use either one or both heavier sway bars to increase roll stiffness all over or in an unbalanced way on this Jeep without understanding the effect, yeah that's a quick way to really fishtail.. Or to increase tire pressures? Yeah you guys got this. It's not like both of those would amplify an underlying problem...


I'd check things that actually contribute to or cause the problem before you make it more pronounced or mask it with something that could actually just make it harder to see until it shows in a more dangerous way. .. What might create that squirmy unsettling feeling in such a specific way? Alignment. damaged bushings, over or under torqued bolts, shocks, whatever, but these things control the movement that you are saying is not behaving correctly. But hey I like the bars, but my jeep was arrow straight to start. I set my tires at 34 and they run 36-38 when hot.. Subscribed
My problem is that I have twice now, brought the truck into the dealership complaining of this issue and twice been sent away with the same BS. "Everything checks out fine. We drove it and it's normal. Blah blah blah."

So what do I do. Call them liars?

Either they park it and feed me a line, or they've actually checked it out and the innate performance of the current suspension features pulling when going over non-symetrical bumps.
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Old 03-20-2015, 04:07 PM
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Re: Is there anything that can be done to reduce fish-tail action?

I would drive another one off the lot at the dealer just for a back to back.
The other thing to try is just rotate the tires and see if it changes.
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Old 03-20-2015, 06:51 PM
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Re: Is there anything that can be done to reduce fish-tail action?

Redddog: Does your GC have the factory tow package? Dave
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Old 03-20-2015, 07:19 PM
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Re: Is there anything that can be done to reduce fish-tail action?

No sir.
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Old 03-20-2015, 07:21 PM
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Re: Is there anything that can be done to reduce fish-tail action?

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Originally Posted by JoeD View Post
I would drive another one off the lot at the dealer just for a back to back.
The other thing to try is just rotate the tires and see if it changes.
It did it from the time I drove off the lot. So a tire rotation doesn't make sense, no?

I actually did drive one that didn't do it. My brother-in-law bought the same truck 2 weeks after I did. No issue with his.
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Old 03-20-2015, 07:43 PM
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Re: Is there anything that can be done to reduce fish-tail action?

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Originally Posted by redddog View Post
It did it from the time I drove off the lot. So a tire rotation doesn't make sense, no?

I actually did drive one that didn't do it. My brother-in-law bought the same truck 2 weeks after I did. No issue with his.
If the tires were never rotated from when you drove off the lot, it's possible a bad tire could cause it. It's just an easy thing to check. I would also jack up up and just check everything, just jack it by the lower control arm and check it like you would a ball joint.
How many miles?
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Old 03-20-2015, 08:52 PM
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Re: Is there anything that can be done to reduce fish-tail action?

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Originally Posted by JoeD View Post
I would drive another one off the lot at the dealer just for a back to back.
The other thing to try is just rotate the tires and see if it changes.
That's exactly what I would suggest.

Even if the sway bars help, a stiffer one might just cover up an underlying problem. You should confirm it's the sway bars on another truck before you start upgrading.

My 2014 and 2015 one with Standard Suspension and Tow and the 2nd with Air suspension and Tow, both ride fantastic.

Could be something with those tires you put on disagrees with the suspension too. Hitting some perfect harmonic between the tires swaying and the suspension. You could try a significantly different Air pressure (just as an experiment). Like 4 lbs lower or higher and just see what it does.
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  #22  
Old 03-20-2015, 08:53 PM
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Re: Is there anything that can be done to reduce fish-tail action?

Mine does it on the stock 20"s as well as my LT 18"s. It couldn't be alignment causing it to hop like that... the setting would have to be miles out.

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Old 03-20-2015, 09:13 PM
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Re: Is there anything that can be done to reduce fish-tail action?

Redddog: Not as common maybe on SUV tires etc. but twice now I have had belts break "inside" 15 or 16 inch trailer tires and you should see/feel that effect! The last one I saw nothing really until I got it off the trailer and slowly rolled it along upright, it had a mild "hump" in the center of the tread about 5 or 6 inches long, no loss of air at all. The trailer was dancing up and down! FWIW my GC has trailer tow and it stays "planted" very nicely. Also do a search on here for rear shock tower problems that I seem to remember from awhile ago that were either loose or broken or "wrong" from the factory maybe? Good luck, I believe something is not right as you suspect. Dave
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Old 03-22-2015, 06:49 PM
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Quote:
Originally Posted by redddog View Post
I'd say from 35mph on up.
Mine is only at hwy speed. Sounds like if you test drove another one, yours is not right. Maybe find a spot where it always does it and make the mechanic test drive your jeep and a new one while you ride along to make them feel the difference. You drive your jeep everyday and know what is not right. Unfortunately you will have to prove it to them since they are not listening. Good luck.
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