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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKVI-A6 Golf family including Jetta SportWagen (~ 2010-2014)

VW MKVI-A6 Golf family including Jetta SportWagen (~ 2010-2014) Discussions area for A6/MkVI (2010-2014) Golf and Golf Wagons (Jetta Sportwagon in the USA).

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Old September 15th, 2019, 08:39   #1
alext91
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Default 26k mile transmission fluid change

Just changed my manual transmission fluid in my 2013 JSW 6 speed since I'm going on a road trip in a week. Well I'm glad I did because the fluid was very dark! Anyone else experience this?

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2013 Jetta Sportwagen TDI 6MT Pano, Candy White
2015 Golf TDI S 4DR 6MT (Wife's)
2015 Yamaha FJ-09
1999.5 Jetta TDI Tornado Red (Sold)
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Old September 17th, 2019, 13:34   #2
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Nobody else with dirty fluid? I wouldn't think this is normal. Regardless, the car shifts much better now. Much easier to find first. Here I was thinking I needed to adjust my dieselgeek shifter, but this was really what I needed!

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2013 Jetta Sportwagen TDI 6MT Pano, Candy White
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2015 Yamaha FJ-09
1999.5 Jetta TDI Tornado Red (Sold)
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Old September 17th, 2019, 15:00   #3
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What did the fresh fluid look like? I assume it was completely clear or only with a hint of amber coloration, right? If that is the case, then this really doesn't look normal by any stretch of imagination. Even if it was sitting somewhere for two years, waiting for the fix, it should not turn this dark. I really don't have any explanation other than the previous owner wanting to take a revenge on VW, filling the tranny with a dirty engine oil, and let them have it back.
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Old September 17th, 2019, 15:10   #4
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Looks fine to me. I wouldn't worry about it.
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Old September 17th, 2019, 22:30   #5
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I changed mine at 60k miles and it looked similar. I wasn't having any shifting problems and any improvement after was probably placebo even though it "felt" little smoother when cold. I also have the DG Sigma 6 and love it.
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Old September 18th, 2019, 03:36   #6
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Yeah, I'm not super worried about it. Improvement definitely wasn't placebo in my car though. I'm just happy it feels better!

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2013 Jetta Sportwagen TDI 6MT Pano, Candy White
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2015 Yamaha FJ-09
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Old September 18th, 2019, 07:25   #7
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Quote:
Originally Posted by alext91 View Post
Yeah, I'm not super worried about it. Improvement definitely wasn't placebo in my car though. I'm just happy it feels better!

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I changed all my fluids when I bought it @ 70k just for good measure. I like incorporating magnetic plugs.

I grew up on primitive 3 on the trees and other mechanical linkages. Long live the cable shift! Ha
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Old September 22nd, 2019, 15:25   #8
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When new, the color is like olive oil. They darken pretty quickly. It's good to change them out early and often, especially if you do lots of stop-n-go driving. The heat degrades the oil and the degraded oil causes problems for the mechatronics and the clutch.
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Old September 22nd, 2019, 16:32   #9
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Oh, it's a dsg. I was wondering why you'd be changing the fluid so early.
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Old September 22nd, 2019, 16:35   #10
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Mine is a manual, not DSG

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Old September 22nd, 2019, 16:38   #11
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My bad, the other Alex's post confused me.
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Old September 22nd, 2019, 18:32   #12
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Quote:
Originally Posted by alex_tdi View Post
When new, the color is like olive oil. They darken pretty quickly. It's good to change them out early and often, especially if you do lots of stop-n-go driving. The heat degrades the oil and the degraded oil causes problems for the mechatronics and the clutch.
In all the Jettas and Rabbits I owned over the years, the oil looked just like fresh gear oil - light tan even at 200,000. The W250 pickup was the only vehicle I owned in which I drained the gear oil (at 150,000), but when I saw the old oil was the same color as fresh, the old one went right back in, and I never bothered to check it again. This is the first time I see gear oil this dark, and moreover, with this few miles in it. I wonder how the tranny would feel if it were refilled with some good quality synthetic 75W90 gear oil. One thing is for sure - it would cost only a fraction of what the OEM oil would.
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Old September 22nd, 2019, 18:56   #13
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Judging an oil by transparency isn't really that helpful. I've seen brand new gear oil that's quite dark. Also some very expensive synthetic oils are quite dark.
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Old September 22nd, 2019, 21:11   #14
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Judging an oil by transparency isn't really that helpful.
I agree, but I was concerned more with the change in color, which I assumed was much lighter originally, when the oil was fresh. That's why I asked the OP what color the new oil was. I have never seen what the OEM oil for this tranny looks like, but if it's as dark as what is shown in the image, then it's a non-issue.
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Old September 23rd, 2019, 01:10   #15
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It's darker than mine was, but that doesn't mean much. We all know that diesel motor oil lubricates just fine after it darkens almost immediately. As long as the lube isn't full of glitter, I'd say it's a non-issue.
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