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DSG and Haldex fluid change time #5465857 06/29/20 06:15 PM
Joined: Nov 2009
Posts: 659
TiGeo Offline OP
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40k miles on my 2018 VW Golf Sportwagen. DSG service and Haldex (awd). First time DIY for both but looks simple enough. Haldex fluid is VW; DSG is Liquimoly which BTW doesn't actually have the approval but is fine to use...it's "recommended" for and lots of folks use it. Maintenance interval on the DSG is 40k miles and Haldex is 3 years for the first change and every 2 years after that. It's easy enough to do them at the same time. May do UOA on both fluids for kicks as well as virgin.

20200629_190613.jpg

2018 VW Atlas SEL 4Motion 3.6 - Dealer Castrol 5W40 VW filter
2018 VW GSW S 4Motion 1.8 DSG Unitronic St2 IS20 - LiquiMoly Molygen 5W40 Mann filter
2013 Ford Focus SE HB 5-spd 2.0 - MC 5W20 MC filter
Re: DSG and Haldex fluid change time [Re: TiGeo] #5465991 06/29/20 10:51 PM
Joined: Aug 2017
Posts: 1,879
sloinker Offline
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Are you going to bottom fill?

Re: DSG and Haldex fluid change time [Re: TiGeo] #5466068 06/30/20 06:07 AM
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madRiver Offline
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Is the Haldex simply a bolt to drain and another to fill?

I am pretty miffed overall when VW dealer recommended changed the fluid at 30k 1.25 years out when wife brought our 2018 Tiguan for oil change and she accepted. Now stuck with 2 years.

Last edited by madRiver; 06/30/20 06:07 AM.
Re: DSG and Haldex fluid change time [Re: sloinker] #5466075 06/30/20 06:23 AM
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TiGeo Offline OP
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Originally Posted by sloinker
Are you going to bottom fill?


Yes - it seems to be the more "proper" way and is faster.


2018 VW Atlas SEL 4Motion 3.6 - Dealer Castrol 5W40 VW filter
2018 VW GSW S 4Motion 1.8 DSG Unitronic St2 IS20 - LiquiMoly Molygen 5W40 Mann filter
2013 Ford Focus SE HB 5-spd 2.0 - MC 5W20 MC filter
Re: DSG and Haldex fluid change time [Re: madRiver] #5466077 06/30/20 06:25 AM
Joined: Nov 2009
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TiGeo Offline OP
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Originally Posted by madRiver
Is the Haldex simply a bolt to drain and another to fill?

I am pretty miffed overall when VW dealer recommended changed the fluid at 30k 1.25 years out when wife brought our 2018 Tiguan for oil change and she accepted. Now stuck with 2 years.


Yes pretty much. However, you also should remove the pump and clean the filter screen.

https://youtu.be/dLbWuHiFJLM


2018 VW Atlas SEL 4Motion 3.6 - Dealer Castrol 5W40 VW filter
2018 VW GSW S 4Motion 1.8 DSG Unitronic St2 IS20 - LiquiMoly Molygen 5W40 Mann filter
2013 Ford Focus SE HB 5-spd 2.0 - MC 5W20 MC filter
Re: DSG and Haldex fluid change time [Re: TiGeo] #5466079 06/30/20 06:25 AM
Joined: Nov 2009
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TiGeo Offline OP
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2018 VW Atlas SEL 4Motion 3.6 - Dealer Castrol 5W40 VW filter
2018 VW GSW S 4Motion 1.8 DSG Unitronic St2 IS20 - LiquiMoly Molygen 5W40 Mann filter
2013 Ford Focus SE HB 5-spd 2.0 - MC 5W20 MC filter
Re: DSG and Haldex fluid change time [Re: TiGeo] #5466288 06/30/20 11:31 AM
Joined: Mar 2011
Posts: 1,573
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SLO_Town Offline
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Are you going to do the final fluid level adjustment with the engine running?

Scott


03 BMW E46 330Ci ZSP (Euro Castrol 0W-30)
10 Honda Element SC (Castrol Magnatec 5W-30)
11 BMW E90 328i M-Sport (Pennzoil Euro 5W-40)
16 VW Passat VR6 3.6L SEL Premium (Castrol 0W-40)
Re: DSG and Haldex fluid change time [Re: TiGeo] #5466412 06/30/20 02:23 PM
Joined: Aug 2017
Posts: 1,879
sloinker Offline
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I did the Haldex and Bottom fill transmission service on my Tiguan a few months ago. Not a big fan of the transmission fill process as it seems wasteful. Next time I am going to measure the exact amount drained, add the suggested fill and see how much drains after warmup with the stand pipe re-installed. That amount is just a waste of resources and money and I bet it is at least a quart. The Haldex is easy except disconnecting the wiring fastener on top to get the pump assembly off for cleaning. The 800ml of fluid is also pricey. I have two DSG services in about 9 months, I am going to drain and measure and refill through the filter opening instead of bottom fill on those vehicles. Not possible with the Tiguan. I am going to use the Red Line DSG fluid and a Mahle filter for the DSG's. The Tiguan used Toyota 4 fluid.

Re: DSG and Haldex fluid change time [Re: SLO_Town] #5466450 06/30/20 03:36 PM
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TiGeo Offline OP
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Originally Posted by SLO_Town
Are you going to do the final fluid level adjustment with the engine running?

Scott


Per the DIY, yes. I have an OBDEleven so can monitor the DSG temp. My biggest issue with this service is simply getting the vehicle lifted and level - I'll probalby use my ramps and my driveway as it's sloped vs. the PITA it is to raise the rear end onto jack stands.


2018 VW Atlas SEL 4Motion 3.6 - Dealer Castrol 5W40 VW filter
2018 VW GSW S 4Motion 1.8 DSG Unitronic St2 IS20 - LiquiMoly Molygen 5W40 Mann filter
2013 Ford Focus SE HB 5-spd 2.0 - MC 5W20 MC filter
Re: DSG and Haldex fluid change time [Re: TiGeo] #5467812 07/02/20 11:39 AM
Joined: Mar 2011
Posts: 1,573
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SLO_Town Offline
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Originally Posted by TiGeo
Originally Posted by SLO_Town
Are you going to do the final fluid level adjustment with the engine running?

Scott


Per the DIY, yes. I have an OBDEleven so can monitor the DSG temp. My biggest issue with this service is simply getting the vehicle lifted and level - I'll probalby use my ramps and my driveway as it's sloped vs. the PITA it is to raise the rear end onto jack stands.

Good, thanks for verifying. I use ramps and jack stands on my wife's E90 auto. Will do the same for the Passat. FWIW, I use a level on the rocker sills so I get the rake of the car right. I'm going to change the Passat at 20K miles. I will fill from underneath to set the proper level. When people refill with the same amount that drained out, IMO this might not be correct. How does one know if the fluid level was right to begin with?

Related question. Does your DSG take moment to engage reverse during a cold start?

Scott


03 BMW E46 330Ci ZSP (Euro Castrol 0W-30)
10 Honda Element SC (Castrol Magnatec 5W-30)
11 BMW E90 328i M-Sport (Pennzoil Euro 5W-40)
16 VW Passat VR6 3.6L SEL Premium (Castrol 0W-40)
Re: DSG and Haldex fluid change time [Re: SLO_Town] #5468542 07/03/20 08:56 AM
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Posts: 659
TiGeo Offline OP
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Originally Posted by SLO_Town
Originally Posted by TiGeo
Originally Posted by SLO_Town
Are you going to do the final fluid level adjustment with the engine running?

Scott


Per the DIY, yes. I have an OBDEleven so can monitor the DSG temp. My biggest issue with this service is simply getting the vehicle lifted and level - I'll probalby use my ramps and my driveway as it's sloped vs. the PITA it is to raise the rear end onto jack stands.

Good, thanks for verifying. I use ramps and jack stands on my wife's E90 auto. Will do the same for the Passat. FWIW, I use a level on the rocker sills so I get the rake of the car right. I'm going to change the Passat at 20K miles. I will fill from underneath to set the proper level. When people refill with the same amount that drained out, IMO this might not be correct. How does one know if the fluid level was right to begin with?

Related question. Does your DSG take moment to engage reverse during a cold start?

Scott


Yes, it does delay the reverse engagement sometimes for sure.


2018 VW Atlas SEL 4Motion 3.6 - Dealer Castrol 5W40 VW filter
2018 VW GSW S 4Motion 1.8 DSG Unitronic St2 IS20 - LiquiMoly Molygen 5W40 Mann filter
2013 Ford Focus SE HB 5-spd 2.0 - MC 5W20 MC filter
Re: DSG and Haldex fluid change time [Re: TiGeo] #5472769 07/08/20 01:04 PM
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TiGeo Offline OP
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Completed both today. About 4 hours total taking my time with breaks etc. Here are my notes:

You will spend more time getting all the battery/intake crap out of the way than changing the filter. I didn’t completely remove the battery tray; the clips for the wires on it are a PITA so I just stood it upright against the air duct and had no-drama access.

If you want to do a turbo muffler delete, now is the time. With the intake and battery out this is v. simple/you have plenty of room.

My car wasn’t perfectly level – it was “good enough”. I used wood blocks for the rear and ramps for the front.

The 14mm allen to remove the DSG drain plug is large, you probably don’t have one and will have to Amazon it; no place had one locally.

I [censored] up and forgot to re-install the fill tube after the DSG was completely drained and put the reg drain plug in to warm it up. I was able to get it sorted when I went to do the leveling but did loose more fluid than if I hadn’t.

The gravity fill method works well, but you do need to poke holes in the bottom of the containers to get it to drain out. The fifth liter was harder to get in b/c it’s overfilling it – I had to hold it up high and work it to get it drained out.

I didn’t remove the Haldex pump completely/unplug it. I just removed it and worked it into a position where I could remove the screen while it was plugged in under the car and made sure it wasn’t hanging by the wire loom. The torx bolts that hold in the screen are T10, they are small and you may not have this.
The Haldex fluid was pretty clean looking; the pump screen did have some residue on it. I have 40K on mine and the manual says do the first at 3 years (no mileage given) then every 2 years after the first one just like the brake fluid. Seems that it used to be every 30K miles which seems v. excessive for this. Maybe it's b/c the fluid is like brake fluid and is hygroscopic?

The Haldex held ~700ml out of the 850ml bottle so a little left over.

I need shorter allen/Torx sockets – on the Haldex unit it was hard to get what I had in to do the fill plug b/c of pieces of the underbody/shielding.
The Haldex pump won’t go all the way in without tightening the bolts due to the new o-rings. You need to do tighten them evenly (some on one, some on the other) to get it to slide in straight.

When you start the car, since you disconnected the battery, you have a host of fault that go away once you drive it. You will still need to do a full scan/clear with OBDEleven/whatever you use once done with your test drive.

When you start the car and put it in r/d to get it off the ramps/out of garage/driveway, it will freak you out b/c it doesn’t start to move like normal without giving it gas. Must just be b/c the fluid hasn’t circulated throughout the tranny. It’s fine after a few stop/gos.

I collected a sample of the old DSG fluid and a virgin sample of the Liquimoly 8100 fluid for analysis at Blackstone, will be interesting to see what it looks like. Didn’t bother doing this with the Haldex fluid.


2018 VW Atlas SEL 4Motion 3.6 - Dealer Castrol 5W40 VW filter
2018 VW GSW S 4Motion 1.8 DSG Unitronic St2 IS20 - LiquiMoly Molygen 5W40 Mann filter
2013 Ford Focus SE HB 5-spd 2.0 - MC 5W20 MC filter
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