Fuchs SINTOPOID SAE 75W-90 in B6 manual gearbox (6sp) and rear diff.... Good to go?

[Luxus Panzer]

I am going to do my manual transmission and rear diff fluids soon as I suspect they are stock (2004)

My local VW Mech has Fuchs SINTOPOID SAE 75W-90 in bulk and I am going to buy a few liters off him...is this stuff good for both gearboxes?

also, will 4L be enough?

thanks all

[old guy]

Yes and yes.

[Luxus Panzer]

Yes and yes.

Schweet.

Thanks.

[old guy]

Schweet.

Thanks.

Oops! I think I answered too soon. Spike alerted me to my error. The Fuchs Sintopoid is listed as acceptable for the 5-speed gearbox but it isn't listed for the 6-speed gearbox. Not sure why. Clicky click®

[Luxus Panzer]

I wonder why??

[tHatOne guY]

Somebody needs to tell ECS Tuning then...

https://www.ecstuning.com/Audi-B6_A4...uid/ES2992951/

[old guy]

I did a little searching and found this. The Sintopoid 75W-90 meets the VW spec TL 521 45-Y (G 052 145 A2) and is GL-4 / GL-5 rated.Clicky click®

Here's a list of VW oil specs: Clicky click®

[Luxus Panzer]

I did a little searching and found this. The Sintopoid 75W-90 meets the VW spec TL 521 45-Y (G 052 145 A2) and is GL-5 rated.Clicky click®

Here's a list of VW oil specs: Clicky click®

So because it is VW spec TL 521 45-Y (G 052 145 A2) and is GL-5 rated, then it is safe to use it in my 6 speed MT gearbox?

[old guy]

So because it is VW spec TL 521 45-Y (G 052 145 A2) and is GL-5 rated, then it is safe to use it in my 6 speed MT gearbox?

I would think so, yes. Ask your mechanic who has the gear oil in bulk if he has been using it in any 6-speeds.

[B6A4Dave]

...I have Motul Gear 300 in all my trans components.. it works :P

[old guy]

...I have Motul Gear 300 in all my trans components.. it works :P

As do I.

[seanf86]

So because it is VW spec TL 521 45-Y (G 052 145 A2) and is GL-5 rated, then it is safe to use it in my 6 speed MT gearbox?

the G045145a2 fluid is just regular gear oil for the rear diff, the Titan sintofluid 75w80 is the nice shifting when cold fluid that advance auto motion sells, It it also GL5 rated. http://www.fuchslubricants.com/titan...uid-sae-75w-80

[cschuster]

Fuchs titan sintofluid 75W-80 is what i used after a trans rebuild. RMeuropean also sells it. OEM spec for the 6 speed is actually GL-4 though if I recall correctly.

The sintopoid stuff can be put in the rear diff.

[G-Ride]

So because it is VW spec TL 521 45-Y (G 052 145 A2) and is GL-5 rated, then it is safe to use it in my 6 speed MT gearbox?

I've always used GL4 spec oil in my gearbox. GL5 has higher concentrations of sulphur/phosphorus additives which are said to be more corrosive to yellow metals/synchros. Perhaps someone could confirm this. I've been running Redline MT90-GL4

http://www.redlineoil.com/product.aspx?pid=46&pcid=7

[old guy]

Good catch G-Ride! I left out one important part. The Sintopoid is more than just a differential gear oil. It doesn't have the sulfur compounds, is fully synthetic and rated for both GL4 and GL5 applications. Clicky click So yes it is safe to use in a manual transmission.

[Luxus Panzer]

Good catch G-Ride! I left out one important part. The Sintopoid is more than just a differential gear oil. It doesn't have the sulfur compounds, is fully synthetic and rated for both GL4 and GL5 applications. Clicky click So yes it is safe to use in a manual transmission.

Sweet, this juice is going in both mt MT and rear diff.

Thanks all.

[Luxus Panzer]

Just to follow and add info for people searching in the future.....

This is a related thread...

http://www.audizine.com/forum/showth...4#post11723904


After comparing this thread and the thread linked above, I am drawing the conclusion that this Fuchs SINTOPOID SAE 75W-90 can ONLY be used in the MT of a 5 or 6 speed B6 and NOT in the read Diff.

Please chime in if I have put all this together incorrectly.

[Charles.waite]

I was under the impression that the Sintofluid SAE 75W80 was good for the 6-speeds as they use "G 052 911" spec fluids which the Sintofluid adheres to according to Fuch's site: http://www.fuchslubricants.com/titan...uid-sae-75w-80

The Sintopoid SAE 75W90 is GL-5 rated (all the Sintopoids are) and is specced to meet the "G 052 145" spec that our rear diffs require, again, according to Fuchs: http://www.fuchslubricants.com/titan...oid-sae-75w-90

I can't comment on the 5-speeds however.

Those two fluids are what I plan on putting in my transmission and rear diff (in my b7, but same deal as any 6-speed b6) when I get around to it. Also AutohausAZ has a killer deal on these. Plus free shipping over $75...

[old guy]

I have been using Motul Gear 300 GL4/GL5 75w90 in both my 5-speed transmission and rear differential for over 100k miles and it hasn't blown up yet. Any 75w90 GL4/GL5 synthetic should work fine in both applications.

[Charles.waite]

I have been using Motul Gear 300 GL4/GL5 75w90 in both my 5-speed transmission and rear differential for over 100k miles and it hasn't blown up yet.

I also put Gear 300 in my 6-speed b6 a few years back and loved everything about it except its propensity to grind 1st and 2nd when it was cold. Warm/hot shifting was butter.

[old guy]

I also put Gear 300 in my 6-speed b6 a few years back and loved everything about it except its propensity to grind 1st and 2nd when it was cold. Warm/hot shifting was butter.

I noticed the same thing for the first winter. After that it didn't make any difference hot or cold. Now it's smooth under any conditions.

[Luxus Panzer]

Alright then.... so we are now back to Fuchs SINTOPOID SAE 75W-90 being safe to use in the 6sp MT and rear diff of a B6 A4.

[Luxus Panzer]

Bentley manual agrees with 75W-90 I'm both the MT and rear diff or a 6speed MT as well.

I will snap some pics and upload for the archives soonest.

[Charles.waite]

Weight is only part of the equation. You want a GL-4 spec for the transmission and GL-5 spec for the diff.

The Motul Gear 300 meets both specs but many (most?) fluids don't. They usually meet one or the other but often not both.

Hence my choice of sintofluid for the trans and sintopoid for the diff.

Which brings me to an admission that the SintoFluid I linked to only says GL5 whereas the SintoFluid FE (http://www.fuchslubricants.com/titan...uid-fe-sae-75w) is GL-4 however the compatible specs don't list the proper VW G 052 911 spec for the 6-speed. What to do...

[old guy]

Maybe you missed this but the Sintopoid LS 75W-90 is both GL4/GL5 rated. Clicky click®

[Charles.waite]

It's for limited slip Diffs according to the pdf on those linked pages.

I just wonder, is the VW spec more important than the GL rating?

[imnuts]

I just wonder, is the VW spec more important than the GL rating?

It's my understanding that the VW spec is basically a guideline, and to get onto their approved list you pay a bunch of money for them to test it. The API rating is likely the most important part.

Sent from my DROID Turbo 2

[Kevin C]

It's for limited slip Diffs according to the pdf on those linked pages.

I just wonder, is the VW spec more important than the GL rating?

My experience says that the friction properties that work well with a limited slip will compromise synchro engagement. It may work, but a non LSD gears oil should work better.

That said, I went with factory fill on my six speed and Red line GL5 in the rear diff.

[Charles.waite]

So after looking this up on the Fuchs site, and looking up Audi part numbers in ETKA, the 02X 6-speed uses a G055532 fluid, which technically none of the Fuchs gear oils are compatible with. The 01A, 0A3, and 01E all can use the G052911 fluid so the TITAN SINTOFLUID 75W-80 or TITAN SINTOPOID 75W-90 are both recommended for these transmissions.

The rear diffs are all pretty much the same and Fuchs recommends TITAN SINTOPOID FE 75W-85. The FE stands for Fuel Economy apparently...

The site with these recommendations is here: http://fuchs-eu.lubricantadvisor.com....aspx?lang=eng which Fuchs links to from their own website so I'm assuming its accurate.

I feel like I should go back and delete my older posts now...

[Luxus Panzer]

Bentley manual agrees with 75W-90 I'm both the MT and rear diff or a 6speed MT as well.

I will snap some pics and upload for the archives soonest.

[MikTip]

I've always used GL4 spec oil in my gearbox. GL5 has higher concentrations of sulphur/phosphorus additives which are said to be more corrosive to yellow metals/synchros. Perhaps someone could confirm this. I've been running Redline MT90-GL4

http://www.redlineoil.com/product.aspx?pid=46&pcid=7

Older, non synthetic oils which are only GL5 rated may contain sulphur/phos. Smell it...you will know.

The Newer fully synthetic GL4 and GL5 dual rated oils do not contain harmful additives that mess with the synchros.

Also the gearbox has to get above 250 degrees+ for the sulphur to actually possibly harm the synchros.

Most modern Audi synchros are silicon bronze. Much more durable than older style brass synchros. Your valve guides are made of silicon bronze.

This old GL4/GL5 bedate seems to resurface every so many years...

[OttawaWill]

Luxus, did you end up using the Fuchs 75w-90? He had it been working for you? Any issues over the winter? This is on my list of things to do.
Will

Sent from my ONEPLUS A3000 using Audizine mobile app

[old guy]

Luxus, did you end up using the Fuchs 75w-90? He had it been working for you? Any issues over the winter? This is on my list of things to do.
Will

One more oil to consider: Clicky click®

[Biged243]

I used 1/3 part mt90 and 2/3 part motul 300 in the trans and all motul 300 in the rear. I used the redline to help thin the 300 because I am in Michigan and it helps with the cold day to help with the "frozen" 1-2 shift in the winters on a cold trans.

[DarkoNova]

One more oil to consider: Clicky click®

Is that good for the rear diff, too? If it is, I'll just buy a bunch and change everything all at once.

[old guy]

Is that good for the rear diff, too? If it is, I'll just buy a bunch and change everything all at once.

It meets all the appropriate specs so I have to say yes. I used Motul Gear 300 in my rear differential simply because I had it on my shelf. If I ever change the rear dif again I will use Ravenol.

[Luxus Panzer]

Luxus, did you end up using the Fuchs 75w-90? He had it been working for you? Any issues over the winter? This is on my list of things to do.
Will

Sent from my ONEPLUS A3000 using Audizine mobile app

No issues so far. Yet to see -20 with it in.

[OttawaWill]

No issues so far. Yet to see -20 with it in.

You have it in Trans and rear diff?
The brand OG recommended might be more difcult to find. I know a guy(MB autocare) who uses Fuchs at his shop. I'll check his price and compare it to ravenol. That's if I can find some.

Sent from my ONEPLUS A3000 using Audizine mobile app

[old guy]

Clicky click®

[Spike00513]

It meets all the appropriate specs so I have to say yes. I used Motul Gear 300 in my rear differential simply because I had it on my shelf. If I ever change the rear dif again I will use Ravenol.

Maybe the rear diff is less picky than a big transmission with a lot of different moving parts, because the rear diff is just an open hypoid gear bathing in the specified amount of gear oil.
I too, already happen to have enough Motul Gear 300 for it; I just need to find some level ground where I can perform the service.

And maybe a magnetic plug(s) if I can find any that will fit the rear diff.
I already have one up front but only for the engine oil pan; a MetalNerd one that seems pretty sturdy and fits both 1.8T and 3.0L.

You have it in Trans and rear diff?
The brand OG recommended might be more difcult to find. I know a guy(MB autocare) who uses Fuchs at his shop. I'll check his price and compare it to ravenol. That's if I can find some.

One time, I was looking for maybe a different Fuchs product, and it came up in the results on AutohausAZ under a BMW model, not for the B6 A4. So I just ordered it anyway that way, adding it to my cart. And it let me.
Maybe this won't help if you are not using that specific site for example, such as trying to find something closer to Canada.

I heard about this site before but am not familiar with it, not sure if it's something they'd have at an affordable price.

Clicky