Terrible Grinding Noise Coming from the Rear
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Terrible Grinding Noise Coming from the Rear
Just yesterday, cruising at 90km/h, my car all of a sudden started to make this metal-on-metal grinding noise. I immediately pulled over on the shoulder of the highway. But during the time when I pulled over, I'm pretty sure I smelled some oil. But after 10 seconds, the oil smell disappeared.
I got out of my car, checked under the rear of my car where the rear differential is, but there were no signs of leaks. I decided to move my car forward a bit on the shoulder of the highway. It continues to make a grinding noise coming from the rear right of the car. At this point, i decided to limp my car back home doing 30km/h.
Every time the car is in motion, starting from 1st gear idle speed, the grinding noise is audible, and it gets louder as the speed increases.
When I got home, I checked the handbrake and it engages and disengages perfectly. Then, I loosened the nut from under the lever. I also took off the rotors and loosened the star nut in the brake drum. So basically the whole handbrake cable is loose and test drove it. Still the same grinding noise!
I checked the foot brake, and it engages and disengages fine too, and none of the brake pistons seem to be seized. I think i ruled out that the brakes are okay.
I think the wheel bearings are fine, because the grinding noise is audible driving straight and around corners.
But from what I remembered smelling (like oil), could it be the rear differential that is causing this grinding? Is there a way to test my rear differential?
Please help shed some light on this problem. I bought my 08 evo less than 2 months ago.. and I've already encountered a few minor problems plus this!
Thanks in advance!
I got out of my car, checked under the rear of my car where the rear differential is, but there were no signs of leaks. I decided to move my car forward a bit on the shoulder of the highway. It continues to make a grinding noise coming from the rear right of the car. At this point, i decided to limp my car back home doing 30km/h.
Every time the car is in motion, starting from 1st gear idle speed, the grinding noise is audible, and it gets louder as the speed increases.
When I got home, I checked the handbrake and it engages and disengages perfectly. Then, I loosened the nut from under the lever. I also took off the rotors and loosened the star nut in the brake drum. So basically the whole handbrake cable is loose and test drove it. Still the same grinding noise!
I checked the foot brake, and it engages and disengages fine too, and none of the brake pistons seem to be seized. I think i ruled out that the brakes are okay.
I think the wheel bearings are fine, because the grinding noise is audible driving straight and around corners.
But from what I remembered smelling (like oil), could it be the rear differential that is causing this grinding? Is there a way to test my rear differential?
Please help shed some light on this problem. I bought my 08 evo less than 2 months ago.. and I've already encountered a few minor problems plus this!
Thanks in advance!
#2
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Another possibility is that you snapped a CV joint in the rear and the oil smell is coming from your ACD (which is now being asked to re-route all torque to the front end of the car).
When you lift one rear wheel (at a time), with the car in gear but the parking brake off, can you spin the raised wheel by hand?
When you lift one rear wheel (at a time), with the car in gear but the parking brake off, can you spin the raised wheel by hand?
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Another possibility is that you snapped a CV joint in the rear and the oil smell is coming from your ACD (which is now being asked to re-route all torque to the front end of the car).
When you lift one rear wheel (at a time), with the car in gear but the parking brake off, can you spin the raised wheel by hand?
When you lift one rear wheel (at a time), with the car in gear but the parking brake off, can you spin the raised wheel by hand?
Last night, I tried spinning the tires freely while the rear 2 wheels were up in the air. The wheels turn about 10 degrees and locks, the same thing clockwise or counterclockwise. But this was in neutral with the handbrake disengaged.
I will need to give this a try when I get home from work.
But I haven't tried spinning the jacked up rear wheel in gear yet. Wouldn't this just lock the rear wheel from spinning freely?
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I would still like to try free-spinning my wheels with all wheels up in the air.
But like I said, with just the rear 2 wheels in the air, it locks up after turning 10-15 degrees either clockwise or counterclockwise.
I'm quite positive that the noise is coming from the rear, because at this moment I have the back seat removed. So the grinding noise is very audible.
I was searching, and I found someone said that broken hub bearings sound like a 6"x6" steel bar being dragged across the garage floor. And that description pretty much describes the sound.
Could it be my hub bearings? But I have not hit any curb or anything like that.
But like I said, with just the rear 2 wheels in the air, it locks up after turning 10-15 degrees either clockwise or counterclockwise.
I'm quite positive that the noise is coming from the rear, because at this moment I have the back seat removed. So the grinding noise is very audible.
I was searching, and I found someone said that broken hub bearings sound like a 6"x6" steel bar being dragged across the garage floor. And that description pretty much describes the sound.
Could it be my hub bearings? But I have not hit any curb or anything like that.
#6
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You can test whether it's a wheel bearing while repeating the test of the CV joints: while it's off the ground, yank on the wheel at 3 and then 9 o'clock or 6 and then 12 o'clock. If it tangibly wiggles or, worse, clunks, yeah, your bearing is shot. Do this only if you trust your jack.
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I just checked my differential fluids.. and... they smell burnt!!!!
I don't understand how can it be..
Can someone tell me the correct oil used for the rear differential? And the transfer case?
I don't understand how can it be..
Can someone tell me the correct oil used for the rear differential? And the transfer case?
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Some people said the oil I posted above was fine.. I'm confused now..
I bought my oil from here: http://www.streettunedmotorsports.co...s/diaqueen.htm
On the website, it says the part # 3775610 was replaced by this new bottle of oil. Is this right??
I'm really confused right now....
I bought my oil from here: http://www.streettunedmotorsports.co...s/diaqueen.htm
On the website, it says the part # 3775610 was replaced by this new bottle of oil. Is this right??
I'm really confused right now....
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Haha, thats alright.. I just called 5 Mitsubishi dealerships just to confirm too.
It looks like they discontinued the diaqueen and replaced it with these 1 quart bottles.
I guess my rear differential all of a sudden gave up on me then..
It looks like they discontinued the diaqueen and replaced it with these 1 quart bottles.
I guess my rear differential all of a sudden gave up on me then..
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