Axle hop - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 6 Old 02-16-2008, 07:24 AM Thread Starter
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Axle hop

Had the new JK out in the sand the other day and was getting some serious axle hop from the front axle while climbing a soft sand hill. I was very surprised, thinking I wouldn't get that with the linked front end. Has anyone experienced this? If so, what might be the cause and possible solution to remedy this. I think we all know by now that axle hop is not good.
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post #2 of 6 Old 02-16-2008, 08:09 PM
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If you are getting axle hop, you have way too much air in your tires. How much were you running??
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post #3 of 6 Old 02-17-2008, 06:14 AM Thread Starter
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I was at 12 PSI.

DD
11 JK Unlimited
4.88s, Detroit Locker/Tru Trac
37x12.50-17 Toyo Open Country RT
OME HD, RK ControlArms

Hard core wheeler
85 CJ-7
Built AMC 360,T-18/Dana 300,
4.88's, rear spool
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post #4 of 6 Old 02-17-2008, 02:51 PM
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You can still get axle hop with low psi in sand if you let the wheels spin fast. Some firmer shocks may help, but first I'd try different techniques, ie: Hi vs Lo, Locked vs Unlocked, the various ESP options, etc.

Also depending on the tires, 12 psi may not be low enough. My old Irok sidewalls barely flexed at 12.
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post #5 of 6 Old 02-18-2008, 07:06 AM Thread Starter
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Thanks for the suggestions. As this is my first Jeep without leaf springs, I didn't think I was going to have to deal with this problem. I'm used to axle wrap with leaf springs but figured with the coils and all I wouldn't get the hpping. I'm thinking it might be the soft spring rates of the stock springs.

I hear u on the sidewall flex of Iroks. The ones on my CJ I regularly run at 8 PSI and there is hardly andy sidewall flex on the bias ply.

That 12 psi was on the stocker 225/75r16's and there was plenty of squat. Was afraid to take them down any more.

DD
11 JK Unlimited
4.88s, Detroit Locker/Tru Trac
37x12.50-17 Toyo Open Country RT
OME HD, RK ControlArms

Hard core wheeler
85 CJ-7
Built AMC 360,T-18/Dana 300,
4.88's, rear spool
Rebuild time
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post #6 of 6 Old 02-19-2008, 03:16 PM
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Couple weeks ago I was on a snow run and in the harder fluff I was getting axel wrap in the rear (can you do that with coils?) I found if I gradually got off the clutch it was smooth but if I dropped it quickly it would begin flopping and would not stop until I stopped, changed gears or just left the clutch in... I figured it was my ineptness in the white.

2008 Rescue Green UJK Rubicon 6 spd with a bunch of super cheap mods!
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