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Discussion Starter · #1 ·
Hey guys, I need some help. I am short on time and patience while I prepare for what kind of job could potentially be ahead of me. I apologize if this subject has been covered elsewhere on here. The problem is that people are giving too vague of descriptions with ambiguous information and in return they are getting a myriad of responses. I can not be certain that any of the responses from other threads could be of any use to me. I will describe to the best of my ability and hopefully I can get some good, constructive, solid input from yall. I got issues with my rear.
Rumbling sound from the rear end to be exact. To give you an idea of what it sounds like, think of a kid riding a "Big Wheel" plastic trike. Think of the sound the plastic wheels make on the pavement. Now take that sound and muffle it as if the sound was underwater. That's the sound that is coming from my rear end. It gets louder when I take left hand turns and bends, calms down when traveling straight, and virtually disappears when turning right or taking right hand turns. Just recently I have noticed that my drivers side rear brake makes a metallic "whooshing" or chaffing sound when making left hand turns or bends. It goes away when driving straight or turning right. It's almost as if my left axle is "floating" outward when I make left hand turns, causing it to rub and make that metallic whoosh sound. Do you guys think this could be a wheel bearing? Here is another troubleshooting challenge: I also have a whining noise coming from the rear as well. I can't pin-point what exact location in the rear this is coming from or if it is related to the first issue. I do know that when I accelerate and increase speed, this whining increases in intensity and pitch. It is reminiscent of an air-raid siren, but not as dramatic. If I could replicate the sound, I would probably ask my kid to chock a crushed soda can between the tire and fork of her bicycle like I used to do as a kid to replicate a revving, winding noise. Now, with the cold weather here, it has recently started to make a "pop" sound when accelerating at low speeds (10-20mph), or from a dead stop. My perspective on this $500 car is, "If it isn't broke, don't fix it". The rest of the car is safe, but I don't want this to become potentially dangerous to myself or other drivers. With your input, I can make expectations of what a mechanic might want to fix this, or bring up arguments in case he wants to put me through the wringer. Thanks for all of your help guys.:worship
 

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My guess is yes, wheel bearing(s) are worn, the brake swoosh noise may be related if the axle is drifting.

The whining sound is a worn rear end, possibly even low on oil ?

The popping noise may be a worn u-joint.

Is it safe to drive? Probably, just annoying, and probably can fail at any time. $500 car? You decide if it's worth around 1 grand to fix, at least.
 

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Discussion Starter · #3 ·
Can i possibly wiggle the drive shaft to check for play? If there is play in the drive shaft that would definitely mean bad U-joint, right? I just got in from work. The drive home was nerve racking as it was now popping consistently and more prominently, out of the blue. The car is staying parked until I can get it to the shop. Your probably right on both counts. The whining I can live with. I'll have the shop check and fill the diff. I wonder if i can wiggle the drive shaft without having to put the car on stands. The popping is just damn right frightening. It simply sounds unsafe. Better to leave it parked and be safe than sorry. I can find another whip to use in the mean time. Thanks for your input, man.
 

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The axle bearings in a c clip rear end don't carry any side loads. All they do is hold the weight of the car and make the axle turn true. The side load in a c clip rear end is handled by the differential bearings. If you get the noise in a left hand turn the the left differential bearing is probably worn out. The left differential bearing also carries most of the load when under power because that is the side that the ring gear is on. Most of the pressure from the pinion gear is pushing against the left differential bearing. If this bearing is worn bad enough then your backlash is probably way off and would be causing the whining noise from the gears.
 

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Discussion Starter · #6 ·
You guys are awesome, thanks for the great replies. In the grand scheme of things, all this is making sense. Although I do not have much history on this car, i know that things have been changed around. The car could have been potentially raced. It has the 3.8L motor in it now, but who knows if it was ever swapped along with the tranny for a little bit. If anything, the 3.8L could have been boosted at one point. When I bought the car, I found that the air intake was not secure while changing the filter element. The car also has holes in the A-Pillar from being gauged out, as well as gauge mount holes on the dash. Tokico shocks on it, along with Yukon axles were discovered when changing the brakes. I have a funny feeling that 3.93 gears at best were installed in this thing. I never owned a V-6 that takes off while spinning wheel like this one does. It really gets up and goes. Other than what is going on with the rear right now, this car has been uber-reliable and fun. The motor and trans are pretty solid too. I'll keep everyone updated on what the problem actually turns out to be, after I get it back from the shop.
 
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