notabiker
Active member
Okay our 2012 jetta tdi 6m is nearing 100k miles and I put new tires on about 5k ago (some eco plus all season Continental Control Contact or such) and thought it was just a noisy tire.
Did my oil change the other day and tested the car while it was up on jack stands. Still noisy and you can feel roughness/vibrations through the floor starting around 35-40mph. Checked wheel bearings and those are tight. I did change the trans oil about 25k ago with OEM stuff so I cleaned a pan and dropped it and no chunks (thankfully!!) but the oil was darkish already and just some fine metal sludge on the magnet I put in the plug. I refilled with some nice Amsoil 75w90 GL4 oil I had on hand for another vehicle but never used.
I did end up disconnecting the drivers side axle from the trans stub thing and while the passenger side was locked tight via the brake, it made some howling again but I think that might have just been the differential action (spider gears going fast as the one side wasn't moving). That's what I'm hoping it was at least.
So, I also tried with the wheels cranked with the axles connected and it seems louder and seemed like more vibrations too sooooooo who here thinks it's the cv joints and not the transmission? And if it's the cv joints, should I replace both sides or do some more testing and see if I can narrow it down to one side or the other.
And I did a stethoscope check on the wheel bearings and trans output bearings and the wheels sounded quiet and the trans was noisy because of the engine but it almost sounded like I could hear something besides engine. And a tip, it's LOUD AS EEF when you drop the end and it hits the concrete floor while the stethoscope is still in your ears!!
If I do the cv axles then I see OEM is expensive and I was thinking of these
https://www.carid.com/2012-volkswagen-jetta-driveline-axles/dss-axle-shaft-assembly-937791487.html as they come with a 36,000 3 year warranty at least. Or O'reilly or autozone or advance auto parts all have limited lifetime warranty axles available.
Thoughts anyone?
Did my oil change the other day and tested the car while it was up on jack stands. Still noisy and you can feel roughness/vibrations through the floor starting around 35-40mph. Checked wheel bearings and those are tight. I did change the trans oil about 25k ago with OEM stuff so I cleaned a pan and dropped it and no chunks (thankfully!!) but the oil was darkish already and just some fine metal sludge on the magnet I put in the plug. I refilled with some nice Amsoil 75w90 GL4 oil I had on hand for another vehicle but never used.
I did end up disconnecting the drivers side axle from the trans stub thing and while the passenger side was locked tight via the brake, it made some howling again but I think that might have just been the differential action (spider gears going fast as the one side wasn't moving). That's what I'm hoping it was at least.
So, I also tried with the wheels cranked with the axles connected and it seems louder and seemed like more vibrations too sooooooo who here thinks it's the cv joints and not the transmission? And if it's the cv joints, should I replace both sides or do some more testing and see if I can narrow it down to one side or the other.
And I did a stethoscope check on the wheel bearings and trans output bearings and the wheels sounded quiet and the trans was noisy because of the engine but it almost sounded like I could hear something besides engine. And a tip, it's LOUD AS EEF when you drop the end and it hits the concrete floor while the stethoscope is still in your ears!!
If I do the cv axles then I see OEM is expensive and I was thinking of these
https://www.carid.com/2012-volkswagen-jetta-driveline-axles/dss-axle-shaft-assembly-937791487.html as they come with a 36,000 3 year warranty at least. Or O'reilly or autozone or advance auto parts all have limited lifetime warranty axles available.
Thoughts anyone?
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