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post #1 of (permalink) Old 12-20-2004, 04:03 AM
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Help! Popping noise from front axle when turning

I just bought an '83 Suburban with a 4" lift and 35's. When I lock teh hubs(Warn) and put it into 4 Hi or Lo, the front axle makes a popping noise if I try to turn left or right while driving. I can unlock the hubs and it won't do this when in 4 Lo or Hi. Also, the pass side hub seems hard to turn when locking/unlocking. Any ideas what this could be and how much this'll cost me? TIA
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post #2 of (permalink) Old 12-20-2004, 11:07 AM
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Re: Help! Popping noise from front axle when turning

I'd say its a bad locking hub or a worn axle u joint.
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post #3 of (permalink) Old 12-20-2004, 11:51 AM
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Re: Help! Popping noise from front axle when turning

Well, if it's doing it, on a hard, dry surface... like asphalt, then nothings wrong except the driver. You're not supposed to enguage 4WD on a high traction surface. It can be done... but being in LOW and turning the wheels will cause the sounds you're hearing. You're getting so much traction etc, that it's causing it to bind and give... On a slippery surface, the tires would slip and the binding would never happen. Another aspect is, factory gears are sometimes slightly different ratios.. like 4.11 up front, and 4.10 in the rear, and in mud etc it's not an issue, but on asphalt it will make the binding & poping becuse there is a mild difference between the 2, and the dry high traction surface is not allowing any slipage at all.

Sometime when the hubs get a little dirty, or the grease inside is a little nasty, or even getting dry, the hubs get sort of hard to turn. Sometimes they can be hard to turn for no good reason at all. If you just bought the sub, it's probably a good idea to repack the wheel bearings soon anyway.. when you do, clean off the old gunk that's probably built up on the backside of the hub etc.. most likely the hub will turn easier when your done.

So, in a nutshell, I would say your frontend is most likely fine. Especially if the noise was caused will using the 4wd on a dry surface. Try locking it in and driving in some light mud or something a little slippery and see if it still does it. Gravel and dirt are a little slippery, but I have still had it do it a lot on those types of surfaces.. so mud would be better. Everything you're hearing is probably normal, but if you think it's not, have it checked out.
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post #4 of (permalink) Old 12-20-2004, 10:34 PM
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Re: Help! Popping noise from front axle when turning

Thanks for the replies! I'll try it in some mud and if that doesn't work, I'll look into teh hubs and ujoints.
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