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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTrans/diff/xfer fluid intervals?
Leading reported evidence
Use normal driving
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Suggestion
However, to have the latest numbers you should check with the dealer for sometimes Porsche changes the service interval so the dealer will have the latest number.
Leading evidence: 'Use normal driving' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check with the dealer' (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.
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Suggestion
However, to have the latest numbers you should check with the dealer for sometimes Porsche changes the service interval so the dealer will have the latest number.
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.
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Suggestion
Anyhow, I suspect this 90K miles schedule fluid change applies to the 996 NA cars too.
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Suggestion
I believe many a trannies could have been saved if the fluid was changed before the bearing noises start.
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Suggestion
I've talked to techs about tranny/diff fluid changes and they say if one wants to be proactive to change the fluid oftener, instead of every 90K miles changing the fluid at 60K, 50K or even 45K miles.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check with the dealer
No successful repair reported for this finding.
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Read evidence and context
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Suggestion
However, to have the latest numbers you should check with the dealer for sometimes Porsche changes the service interval so the dealer will have the latest number.
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've talked to techs about tranny/diff fluid changes and they say if one wants to be proactive to change the fluid oftener, instead of every 90K miles changing the fluid at 60K, 50K or even 45K miles.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Suggestion
I've talked to techs about tranny/diff fluid changes and they say if one wants to be proactive to change the fluid oftener, instead of every 90K miles changing the fluid at 60K, 50K or even 45K miles.
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23 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
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Generation: 20261027T013556Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
60k miles or 5 years, whichever comes first. Many folks forget to change the M/T fluid. If it's never been done or you don't have a record of it being done previously, it's time. I believe many a trannies could have been saved if the fluid was changed before the bearing noises start. The 996 M/T has sealed bearings (like the IMS bearing) and I doubt the seals in those bearings are any better than the IMS bearing. Lubrication is good.....
I don't remember seeing trans/diff/xfer case fluid on the 60K service list. Somewhat unrelated, but ZF recommends fluid changes at 100K if you drive normally to 60K if you drive aggressively for transmission they supplied to audi (that claims it's a "lifetime" thing).
KK is one of those owners who thinks spending 3x the amount you should on "preventative" maintenance is money well spent for peace of mind.
1k oil change intervals
Yearly power steering flushes
3 year tranny flush intervals
30k clutch replacements
...drives car 1500 miles a year.
Frankly, I have no problem with people who do that, it's their money. My only problem with it is how incredibly wasteful it is.
I hope I have all its history since we ordered it new in 00 (01 build)
65k is on the clock now and I'm about to get the 60k finally done so was wondering about the fluids too since every time its at the Indy they want to flush something
No drive train noises or issues besides the random bad shift, but that's more due to me not driving a MT regularly for 8 years (the 911 is hers, but I'm the one that drives it once a week or so to keep it healthy).
For the Turbo/GT3 the scheduled change interval is every 90K miles. This is for a car used for normal driving. Tracking/etc one has to use his own judgement.
Anyhow, I suspect this 90K miles schedule fluid change applies to the 996 NA cars too. Should be covered in the owners manual.
However, to have the latest numbers you should check with the dealer for sometimes Porsche changes the service interval so the dealer will have the latest number.
I've talked to techs about tranny/diff fluid changes and they say if one wants to be proactive to change the fluid oftener, instead of every 90K miles changing the fluid at 60K, 50K or even 45K miles.
For Tip equipped cars the same applies.
While ZF might recommend 100K mile fluid services if one reads the fine print ZF (like other equipment makers) always defers to the automaker into which the equipment is installed. Thus if ZF says 100K miles and Porsche says 90K miles, the 90K miles is what should be used.
I changed my transmission fluid at the dealer at 40k miles and I could easily see the difference with the new fluid, at any gear changes and also lifting the gas on the highway.
This is a must do for cars over 50k miles or over 5 years old I think.
I did mine at 72 kilometerers but my motor has half that... so I'm not sure if the fluid was changed with the new engine but regardless, I didn't notice any difference.
You should probably change all fluids every time you drive it, because, you know, it's cheaper than buying new everything. Start with idiotic premise, arrive at idiotic conclusions...
Agreed easy DIY and fun to do... just be careful which fluid you use, ask me how I know. Stay away from Amsoil 75W-90 Severe Gear is all I can say if you like to engage gears below 60F ambient and want a manufacturer to stand by it's product... very disappointing. Next up was simple Mobile 1 75W-90 from Autozone... it seems too slippery for synchros around town driving (re: clunks in lower rpm shifts) so this will come back out soon as well. For those who are getting ready to try this DIY... safest bet is clearly factory OEM fill from Porsche if you want guaranteed OEM feel and performance... but for $120 for 3L it becomes a pricey DIY when you're mind is used to $10 per Liter OTC for your other vehicles... damn Trans-axle combo is finicky!
Glad to hear if anyone has a good experience with an aftermarket fluid they have used, but learn from my experience and avoid these two for your 6MT.
Based on additional research and personal recommendation from my friend who just used it, I will now pick up this to try next (I am a glutten for punishment) and will share my experience... hopefully 3rd time is a charm... all in the name of science! Wish me luck
http://www.lufteknic.com/Merchant2/m...ode=lubricants
Viper, What do you mean by the Mobil 1 problem? What exactly is it doing or what symptoms are you having? I think mine shifts fine with it but you cant just jump in and start shifting without letting it warm up a little.
Is Mobil Delvac also OK to use according to Porsche dealer?
Another member said this:
Halik,
I got flamed for suggesting 3 years yet a legit expert stated you should do yearly MT fluid change if you track your car. I will link it if you dont believe it.
I did not see that before now, hmmm... too late anyway as Delvac is on the way and a friend likes it in his GT3 gearbox so fingers crossed... I'll have my review posted soon enough and maybe this weekend.
Mobil 1 75W-90 has a very decent feel, just some light clunking from 2-3-4-5 shifts below 3-4k when cruising like not enough friction maybe so synchros not full slowing down the matching gear before engaging... that was my novice interpretation. Regardless, I never experienced the clunking with the stock fluid... obove 4k it is liquid smooth like the OEM once warm so that is good... only fluid so far I say run away from was the Severe Gear Amsoil, for both the product and company support...
I did all my subjective comparisons of feel once box and engine warm after 30+ minutes of driving to be sure I was being consistent.
Halik said:
Expert said:
Hey Halik, Im starting to feel less "idiotic" on these fluid change threads. Hmmmm. Complete silence now from the "fluid pros" that have been reaming me about my change intervals. Thats OK.
