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Fuels & Lubricants Discussion all about Fuels & Lubricants. synthetic oil, conventional oil, brands, change intervals, diesel grades, gelling and such debated items like that. Non TDI related postings will be moved or removed. This forum is NOT for the discussion of biodiesel and other alternative fuels.

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Old December 7th, 2016, 01:57   #766
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Join Date: Dec 2014
Location: PNW

Originally Posted by oprn View Post
Same here! I just found this site and thread, lots of good info but wondering if it's possible to get a little carried away looking for the "right" lube.

My experience started in '83 when I bought a Ford Escort a when draining the tranny discovered the factory fill was ATF. Did some inquiring, yup that's normal.

At the time I had a VW Rabbit that was extensively modified and putting out around double the stock power. Good test I thought and in went the ATF. What a difference in cold weather! And zero shifting problems in hot weather. No reliability or wear issues found. I actually still have that car.

So Dextron II has been my fill of choice ever since with the only problem encountered is the tendency of it to find weak seals and gaskets and seep a bit.
It's not about getting carried away, it's about getting something that works for you.

For me I decided to research with the notion of getting something that would work w/o having to spend the time and money to be doing a bunch of fluid changes trying to get the best fluid. And it's pretty clear what the top candidates are for 02Js (as well as what NOT to use- I have yet to read anyone that's happy with VAG's G070).
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Old February 6th, 2017, 04:16   #767
Join Date: Mar 2008
Location: Tulsa

WoW, what a thread.
2002 Jetta TDI -5speedswap (daily driver), ventectomy, scangauge II, VAGCOM various other vehicles.
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Old May 10th, 2017, 22:56   #768
Join Date: May 2017
Location: Bucharest, RO

Hi guys,

I actually read most of this thread. I either missed it, or the info was not clearly stated. I have a 2006 Polo TDI BNV JCZ transmission. In 2007-2008, the car had a service action (as they call it), and they replaced the gear oil. Part number used: G052512S0. As I found out, this is an internal part number. We can buy it as G052512A2. At around 100k km, I bought gear oil from the dealer - part number G070726A2. At around 200k km - same part number. I didn't pay any attention to the part number. I thought they will sell me what the car uses...
What do you think I should buy now: G052512A2 or G070726A2. Does anyone know for sure the difference between the two?
I'm thinking about this because I have 2 different noises from the gearbox:
1. something like "hhhhh" when under 0C, at first start in the morning. it stops when the clutch is completely disengaged (everything in the gearbox stops). if it's only half, sound is still there. after 5-10 min of driving, the sound goes away. If over 10C, sound is not present.
2. after wellwarmed up gear box, when over 20C in the air, just before the car comes to a complete stop, so 1-2 km/h, it makes a knocking sound but not continuously - it's like the sound can be heard every 45 degrees of the wheel. car can stop and the noise may or may be not present ( depends on where the wheel or driveshaft stops). if the noise is present, it goes away if trying to engage 3rd or 4th gear without pressing the clutch, or if turning the steering wheel !! it also goes away gradually if pressing the clutch. if the car stops and the noise is not present, I can be heard if turning the steering wheel.
if there was a gearbox issue, why is it affected by the turning of the steering wheel?
the car has no abnormal noises when driven: hard accelerating, hard decelerating, turning hard uphill, breaking hard downhill and turning.
someone gave me the idea of checking the tapered coned bronze ring from the flanged output shaft that comes out of the diff, and when doing so, I will put fresh gearoil in. now, what should I use G052512A2 (the service action oil) or the G070726A2 (the oil that the dealer would sell me now according the VIN) ?

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Old May 18th, 2017, 23:03   #769
Join Date: May 2017
Location: Bucharest, RO

just put in G052512A2. Obvious smoother shifting (25 Celsius outside) cold and warm. I expect the lever to move like through honey in the winter for the first 10-15 min but I won't mind.
When I took out the filling plug (car leveled), about 100-150 ml of oil bursted out, so that confirmed my "suspicion" that I did overfill the gearbox, which is good .
When refilling, I tilted the car for about 10-15 degrees, and it took about 1.8 - 1.9L of oil before starting to overflow. Then I put the filling plug back in quickly so I guess I overfilled it also this time.

difference between G052512A2 and G070726A2: G052 seems to have a bit darker colour. At room temp, to the naked eye they seem to have the same viscosity.
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Old May 19th, 2017, 06:35   #770
Chris B
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Join Date: Oct 2001
Location: N. central Illinois
Fuel Economy: 54/48/40

Originally Posted by UhOh View Post
I have yet to read anyone that's happy with VAG's G070).
I've been running the G070 in my '02 for the last 60K at least. I just rolled 300K miles, and she still shifts great. It shifts much better when it is cold (0F or less especially) and all-around I like it better. The only "issue" I notice is when fully warmed up, I will will get a little bit of grind when shifting into reverse if I do it to quickly after depressing the clutch. If I wait an extra second to let the input shaft spin down, it won't.

2002 Jetta GLS Wagon 5spd, Indigo Blue, Grey Velour, Cold WX pack, E-codes, E-switch, B11 in the tank.
"Good drivers have dead flies on the side windows." (Walter Röhrl)
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