16 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTransmission Oil?
Leading reported evidence
Replace tranny oil
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I have replaced tranny oil with "Royal Purple" same grade but it just sucked and went back to OEM after 1 year.
Leading evidence: 'Replace tranny oil' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace atf or transmission oil' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
Went to have the transmission fluid changed in my 03 Turbo's 6-speed and a transmission leak was found (not the fluid's fault, bad seal) and Porsche replaced the transmission.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
As there are special requirements for the manual and Tip transmissions as well as the rear-axle and front axle final drive of the Turbo 996, 911 GT2 (996) only the ATF and transmission oil types tested by Porsche are approved.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
=> Only use the ATF and transmission oils listed below when topping up or changing ATF or transmission oil.
Replace bulletin group 3, #3a/01, dated january 18, 2002
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
This bulletin replaces bulletin Group 3, #3a/01, dated January 18, 2002.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
Went to have the transmission fluid changed in my 03 Turbo's 6-speed and a transmission leak was found (not the fluid's fault, bad seal) and Porsche replaced the transmission.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
As there are special requirements for the manual and Tip transmissions as well as the rear-axle and front axle final drive of the Turbo 996, 911 GT2 (996) only the ATF and transmission oil types tested by Porsche are approved.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
I know this is 996 forum and not a 996 Turbo forum but the above shows Porsche specifically approves certain manual and Tip transmission fluids and axle fluids and cautions against using any not on the approved list.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T112012Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi guys,
Did a search on transmission oil but not much on it. My car will be going in for a service soon and was thinking of changing transmission oil at the same time.
Any tips and/or suggestions on what oil to use? Is it ok if 2 different brands are mixed? Inputs about this would be very much apreciated.
Are there any signs before a tranny gives way?
Cheers
What Shawn said.
OEM.
I've had the 5-speed fluid in my 02 Boxster changed now I forget how many times and each time it has been at a Porsche dealership's service department and factory fluid is used.
238K miles on the original transmission.
Went to have the transmission fluid changed in my 03 Turbo's 6-speed and a transmission leak was found (not the fluid's fault, bad seal) and Porsche replaced the transmission. (Under CPO warranty, thank Goodness.) But I was going to have the OEM fluid used. I've put nearly 20K miles on the replacement transmission (transmission is just fine thank you) and the car's due to go in next week (waiting for my Boxster to get out of the shop -- it went in a few weeks ago for a camshaft actuator solenoid/camshaft actuator R&R) for a clutch accumulator R&R (again thank Goodness for the CPO warranty!) and at the same time I'll have the replacement transmission's fluid changed.
With OEM fluid.
If it ain't broke, don't fix it.
Oh signs of a transmission about to give way.
The signs vary and a bad transmission may not exhibit all of them. A few might not exhibit any and just catastrophically fail, but these are rare though more likely of the car is treated to clutch dump drag starts, speed shifting, or has a heavily modified engine.
But generally: Grinding when upshifting/downshifting; popping out of gear; difficultly selecting 1st gear (or any other gear) with engine/transmission up to temp and engine idling and clutch fully depressed; noises; fluid leaks; hard to pinpoint vibration.
Sincerely,
Macster.
I put swepco 201 in my car a month ago and it was an improvement over the old gear oil. I have since swapped it out for Mobil SHC/Delvac and I find the Mobil to be a bit better than the 201. (Mine is an LSD Trans, no friction modifiers were added to the SHC)
I went into NAPA to get Redline 75W-90 for my trans oil change and they had Valvoline Synpower on sale ($8.99/qt). They didn't have Redline, so I got the Valvoline. It's GL5. Anyone use this? It's gotta work good. Right?
Approved Transmission Oil and ATF (30/08)
Model Year: As of 2001 up to 2005.
This bulletin replaces bulletin Group 3, #3a/01, dated January 18, 2002.
[This bulletin dated Nov. 5, 2008]
Transmission Type:
Manual Transmission: G96/50, G96/88
Tip: A96/50-150
Front Axle final drive: Z96/00
Concerns: Approved ATF and transmission oil.
Information: Updated list of approved transmission oils. Information about miscibility of ATF.
As there are special requirements for the manual and Tip transmissions as well as the rear-axle and front axle final drive of the Turbo 996, 911 GT2 (996) only the ATF and transmission oil types tested by Porsche are approved.
NOTICE
Use of unapproved ATF or transmission oil:
- Excessive wear and damage to transmission parts.
- Reduced service life.
=> Only use the ATF and transmission oils listed below when topping up or changing ATF or transmission oil.
Approved Transmission Oil:
Transmission oil SAE 75W-90 for manual tranmission, front axle final drive (all wheel drive) and rear axle final drive (Tip).
000.043.204.20 Mobil (Mobilube PTX) (Can be mixed)
000.043.204.19 Shell (Transaxle) (Can be mixed)
999.917.546.00 Shell (Transaxle) (Can be mixed)
Manual transmission:
911 Turbo G96/50 - 000.043.204.20; 000.043.204.19 or 999.917.546.00
911 GT2 G96/88 - 000.043.204.20; 000.043.204.19 or 999.917.546.00
Front axle final drive (all wheel drive):
911 Turbo G96/50 - 000.043.204.20; 000.043.204.19 or 999.917.546.00
Rear axle final drive (Tip):
Vehicle type/
transmission type:
911 Turbo
A96/50/150 - 000.043.204.20; 000.043.204.19 or 999.917.546.00
Tip oil (ATF)
000.043.204.41 Shell ATF 3403-M115 (Can be mixed)
Fuchs ATF 3353 (Can be mixed)
999.917.227.00 Fuchs ATF 3353 Plus (Can be mixed)
Tip transmission:
Vehicle/
transmission type:
911 Turbo
A96/50-150 - 999.917.227.00 (or previous ATF specified above)
I know this is 996 forum and not a 996 Turbo forum but the above shows Porsche specifically approves certain manual and Tip transmission fluids and axle fluids and cautions against using any not on the approved list.
Why one would choose to go against this is beyond me.
No way one is going to save enough money to have on hand should a transmssion, Tip, or final drive require replacement due to using a non-approved fluid.
Sincerely,
Macster.
Yes, in his GT3 & Turbo. A lot of the positive support for SHC has been in the GT3 forum but the GT3 gearbox is different to the C2 gearbox so I wasn't initially convinced that SHC was as uitable choice for the C2 box. LVDELL and I exchanged a few messages on the subject and I also discussed the use of SHC with one of the vendors before going ahead with the SHC without modifiers for my C2. Mine has LSD as well which is of course another key factor in gear oil selection/suitability. Some of the better known gearbox specialists are strong supporters of SHC/Devlac and have reported no signs of increased wear or other adverse effects with SHC/Delvac in street cars or race cars so I was satisfied enough to go ahead with trying it in my 996. I also thought it would make a good back to back comparison with the fresh 201 which had just been in the car.
This is a source reference. Confirm exact model applicability in the original material.
