Transmission/transaxle oil type, quantity, DIY?
Thread Starter
Drifting
Joined: Mar 2015
Posts: 3,112
Likes: 23
From: Austin, TX
Has anyone who has either DIYed this or who has access to PET advise whether the GT4's gearbox drain and/or fill plugs have washers that should be replaced? The PDF says there may or may not be washers. If there are, do the gearbox plugs and washers happen to be identical to the plug and washer used for the engine oil drain? If so I'll just order a couple of those from Suncoast since they stock them.
Rennlist Member
Joined: May 2016
Posts: 847
Likes: 83
From: FL
The reference to the dipstick is for the 5 speed trans axle. Thankfully the 6 speed you need to have the oil coming out of the fill hole and you are good.
The gear oil from PET is Mobil 1 Mobilube PTX 75W90 liter bottle
P/N 00004320420L .
Sun Coast is the only source I've found for the liter bottles. You'll need approx 3.2 liters. PIWIS is not required.
Both applications use a crush washer. I'm going to install magnetic drain plugs.
Engine drain plugs
P/N 900 123 106 30 sealing ring 18 X 24
P/N 900 219 020 31 screw plug M 18 X 1,5
The Spyder PET is incorrect on the trans axle drain and fill plugs. They are not M18 and they are made of steel.
The gear oil from PET is Mobil 1 Mobilube PTX 75W90 liter bottle
P/N 00004320420L .
Sun Coast is the only source I've found for the liter bottles. You'll need approx 3.2 liters. PIWIS is not required.
Both applications use a crush washer. I'm going to install magnetic drain plugs.
Engine drain plugs
P/N 900 123 106 30 sealing ring 18 X 24
P/N 900 219 020 31 screw plug M 18 X 1,5
The Spyder PET is incorrect on the trans axle drain and fill plugs. They are not M18 and they are made of steel.
Last edited by r553; Jul 10, 2016 at 09:54 AM. Reason: New findings, deleted trans sealing rings
Thread Starter
Drifting
Joined: Mar 2015
Posts: 3,112
Likes: 23
From: Austin, TX
The reference to the dipstick is for the 5 speed trans axle. Thankfully the 6 speed you need to have the oil coming out of the fill hole and you are good.
The gear oil from PET is Mobil 1 Mobilube PTX 75W90 liter bottle
P/N 00004320420L .
Sun Coast is the only source I've found for the liter bottles. You'll need approx 3.2 liters. PIWIS is not required.
Also the drain plugs are common between the trans axle and the engine and are M18 X 1.5, different from the procedure. Both applications use a crush washer. I'm going to install magnetic drain plugs.
Engine and trans drain plugs
P/N 900 123 106 30 sealing ring 18 X 24
P/N 900 219 020 31 screw plug M 18 X 1,5
The gear oil from PET is Mobil 1 Mobilube PTX 75W90 liter bottle
P/N 00004320420L .
Sun Coast is the only source I've found for the liter bottles. You'll need approx 3.2 liters. PIWIS is not required.
Also the drain plugs are common between the trans axle and the engine and are M18 X 1.5, different from the procedure. Both applications use a crush washer. I'm going to install magnetic drain plugs.
Engine and trans drain plugs
P/N 900 123 106 30 sealing ring 18 X 24
P/N 900 219 020 31 screw plug M 18 X 1,5
According to GTGears, the OEM gearbox drain plug is magnetic, but I'm not sure about the engine oil plug. I'd completely forgotten about that, although it looks like they share a common part number? If so, it sounds like we'd be good to go just ordering the drain plug that Suncoast lists. And out of curiosity, what is the 24 dimension on the sealing ring description?
Last edited by jphughan; Jul 3, 2016 at 12:39 AM.
Rennlist Member
Joined: May 2016
Posts: 847
Likes: 83
From: FL
I bought a spare Porsche trans axle drain plug to be sure of the thread size. It is steel. Of course the Spyder PET is wrong: the trans axle drain plugs are M22 X 1.5.
As for filling this is what AllDataDIY says:
Use manual metering pump WE 1372 to fill in transmission oil up to the lower edge of the filler opening.
As for filling this is what AllDataDIY says:
Use manual metering pump WE 1372 to fill in transmission oil up to the lower edge of the filler opening.
Last edited by r553; Apr 11, 2019 at 09:53 AM. Reason: Added actual trans axle drain plug thread size
Thread Starter
Drifting
Joined: Mar 2015
Posts: 3,112
Likes: 23
From: Austin, TX
Thread Starter
Drifting
Joined: Mar 2015
Posts: 3,112
Likes: 23
From: Austin, TX
Thanks! Ok, so just top it up and definitely replace the sealing rings. Perfectly clear and easy. 
Although this indicates that the plugs are M22, not M18 like the part numbers mentioned above. Which are they? I know this PDF is for the regular 981, but I thought the transmission is essentially the same. Would Porsche really have just changed the plug size?
Although this indicates that the plugs are M22, not M18 like the part numbers mentioned above. Which are they? I know this PDF is for the regular 981, but I thought the transmission is essentially the same. Would Porsche really have just changed the plug size?
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Instructor
Joined: Sep 2015
Posts: 151
Likes: 11
From: TX
Per GT4-PET, replacement gear oil is: 000.043.204.19
000.043.204.19
Shell (Transaxle)
20-liter container
999.917.546.00
Shell (Transaxle)
1-liter container
000.043.204.20
Mobil (Mobilube PTX)
20-liter container
Can be mixed
Attached the OE service document.
000.043.204.19
Shell (Transaxle)
20-liter container
999.917.546.00
Shell (Transaxle)
1-liter container
000.043.204.20
Mobil (Mobilube PTX)
20-liter container
Can be mixed
Attached the OE service document.
Thread Starter
Drifting
Joined: Mar 2015
Posts: 3,112
Likes: 23
From: Austin, TX
Per GT4-PET, replacement gear oil is: 000.043.204.19
Per the post here (via a Porsche tech), brand name to part number associations are:
000.043.204.19
Shell (Transaxle)
20-liter container
999.917.546.00
Shell (Transaxle)
1-liter container
000.043.204.20
Mobil (Mobilube PTX)
20-liter container
Can be mixed
Per the post here (via a Porsche tech), brand name to part number associations are:
000.043.204.19
Shell (Transaxle)
20-liter container
999.917.546.00
Shell (Transaxle)
1-liter container
000.043.204.20
Mobil (Mobilube PTX)
20-liter container
Can be mixed
Also, part number relationships corroborated in this post containing the text of a Porsche bulletin: https://rennlist.com/forums/996-foru...ml#post8226081
Last edited by jphughan; Jul 5, 2016 at 12:59 PM.
Instructor
Joined: Sep 2015
Posts: 151
Likes: 11
From: TX
Shell Transaxle was renamed to Shell Spirax S5 ATE. Data sheet here.
For those ready to guinea-pig their transmission, the internet considers these equivalent (your mileage may vary):
- Castrol Syntrax LongLife 75W-90 GL-5
- Liqui Moly 75W-90 GL-5
- Fuchs Titan Sintopoid 75W-90 GL-5
For those ready to guinea-pig their transmission, the internet considers these equivalent (your mileage may vary):
- Castrol Syntrax LongLife 75W-90 GL-5
- Liqui Moly 75W-90 GL-5
- Fuchs Titan Sintopoid 75W-90 GL-5
Rennlist Member
Joined: Oct 2008
Posts: 9,152
Likes: 1,661
I'm not sure I would take a 17 yr old tech info with allowable replacements as valid just because 1 part number matches up. Changes have happened. When I checked with my dealer they haven't received an approved substitute similar to the listing they had for 987.2 mechanicals.
Thread Starter
Drifting
Joined: Mar 2015
Posts: 3,112
Likes: 23
From: Austin, TX
Thanks for the update! Is the drain plug the same? And do you happen to have correct part numbers for the plugs and crush washers?