Defiant
(Definitely? Defiantly? wat)
11/13/17 07:41 PM
Grinding noise from under the car

My Galant has this really loud grinding noise coming from under the car, almost sounds like a bad bearing.

I recorded a video, you can defiantly hear the noise I'm referring too.
click

The driveshaft was recently rebuilt.


thomcasey
(I ain't no puny human)
11/14/17 11:59 AM
Re: Grinding noise from under the car

Is it possible that part of the exhaust is contacting the driveshaft?

Defiant
(Definitely? Defiantly? wat)
11/14/17 12:40 PM
Re: Grinding noise from under the car

I checked that, and everything is clear.

The sound gets louder the faster I go, but doesn't change when hitting bumps or anything.

Going to check the Tcase this weekend.


Defiant
(Definitely? Defiantly? wat)
11/26/17 11:52 AM
Re: Grinding noise from under the car

The driveshaft makes a clunking sound.
click


Defiant
(Definitely? Defiantly? wat)
12/07/17 06:07 AM
Re: Grinding noise from under the car

Any feedback on the driveshaft noise??

thomcasey
(I ain't no puny human)
12/07/17 07:28 AM
Re: Grinding noise from under the car

How is your lobro joint?

Defiant
(Definitely? Defiantly? wat)
12/07/17 11:43 AM
Re: Grinding noise from under the car

How do you tell if its bad by visual inspection?

That may be the cause of this vibrating noise while using the engine to decelerate.


thomcasey
(I ain't no puny human)
12/07/17 12:28 PM
Re: Grinding noise from under the car

Look at the shaft where it goes into the joint. See if there is extra movement. Also look for tears in the boot. These things dry out and it gets expensive. It is there to allow the drivetrain to move, the lobro allows the DS to have some stretch,

Defiant
(Definitely? Defiantly? wat)
02/15/18 06:55 AM
Re: Grinding noise from under the car

Lobro doesn't have any extra movement.

Still trying to figure this out


Dan D
(220, 221... whatever it takes)
02/15/18 07:59 AM
Re: Grinding noise from under the car

I had similar. Thought it was a bad wheel bearing (which was getting a little bad). When that didn't fix it, the only other rotating part I've not reworked at some point was the driver side axle jackshaft bearing - the part bolted to the back of the block. Similar grinding noise. I'd pulled it before while diagnosis the noise and it didn't feel or sound bad spinning it by hand so I left it alone but apparently it was. Made my noise go away.

It's pretty easy to replace. Could probably press it with a rental c-clamp press no problem. Hydraulic press - easy.



Defiant
(Definitely? Defiantly? wat)
02/20/18 03:33 PM
Re: Grinding noise from under the car

I was able to record a better video showing the sound. I'm doing about 65mph and the noise is very apparent in the video.

https://youtu.be/CisT_3aRU_w


thomcasey
(I ain't no puny human)
02/20/18 06:18 PM
Re: Grinding noise from under the car

have you checked the half-shaft bearing for noise or play?

fuel
("Just to be pedantic!")
02/21/18 08:10 AM
Re: Grinding noise from under the car

I have the same noise, and it's been like that for the last ~10,000kms and hasn't got worse (or better). It just seemed to start one day out of the blue. The noise on mine seems to come from more towards the rear of the car. I also get a horrible shudder when going downhill and letting off the gas in higher gears.

I've been collecting parts like wheel bearings, driveshaft carrier bearings, UJ joints etc and will start replacing items one by one and see when the noise goes away. It could also be the rear diff (or AWS pump for that matter).


Defiant
(Definitely? Defiantly? wat)
02/21/18 08:05 PM
Re: Grinding noise from under the car

I dont get a shudder, but I do get this loud rattling sound when decelerating while in gear.


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