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958 Speed ATF - change

 
Old 12-14-2013, 11:47 AM
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ndx
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Default 958 Speed ATF - change

Hey Guys,

Got all necessary tools to do the job except piwis 2...
So I can't monitor temperature.

Did anyone try to use InfraRed thermometer pointing at pan when changing ATF.

Durametric is not able to read it...

Any ideas?

Thx
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Old 12-14-2013, 11:51 AM
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RajDatta
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I have used an Infrared thermometer in BMW's with great success. There is a range within which you are supposed to top off. It's not an exact number and it can take minutes between the top end and bottom end of the range as the oil and oil pan warm up. You will have plenty of time to top things off.

Good luck.
Raj
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Old 12-14-2013, 12:38 PM
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hahnmgh63
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Is it true that Durametric does not read the temp on one of its channels? I have Durametric but when I did mine I used Vagcom (Similar program but better for Volkswagen/Audi products). The Vagcom is what the Touareg guys use so I knew it would work on the Cayenne. So if you have a VW/Audi enthusiast friend around see if they have Vagcom. It actually costs less than Durametric and is years ahead in development.
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Old 12-14-2013, 02:44 PM
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+1 on the vagcom. Cheaper and easier to use. I have one of those as well.
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Old 12-14-2013, 03:00 PM
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Is that a factory Turbo S? I have two 944 Turbos and still believe they were one of the best cars Porsche ever made. Especially 'Bang for the Buck'.
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Old 12-14-2013, 03:40 PM
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ndx
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Can someone confirm that Vagcom works with 2011+ Cayenne ?
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Old 12-14-2013, 04:22 PM
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I believe Greg found that it was useless with his 2013 CD. Won't even reset the service intervals.
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Old 12-14-2013, 08:31 PM
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I've heard on the Touareg it only works up through MY '10 so it may not work on a '11+ Cayenne.

Correction: From their website Vagcom will work on the newest Touareg's but you have to have one of the newer Ross-Tech adapters. It has to be a Hex-Can adapter. If Greg is out there, it would be interesting to know which adapter he has. I do have the newer Hex-Can as I had to upgrade for it to work on my daughters newer A4.
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Old 12-14-2013, 11:59 PM
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I wonder if new cable still works ?
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Old 12-15-2013, 09:15 AM
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I spoke with the Ross-tech folks regarding VCDS applicability on the 958 Cayenne. Their response was to the effect that Porsche has encrypted the part of the OBD2 module that accepts inputs. You can still use VCDS to monitor, but issuing commands is no longer supported. They'd have to crack the Porsche encryption to give VCDS full functionality on 958s. Hence VCDS monitoring capability only on 2011+ Porsche products.

Why by the way are you changing transmission fluid? According to the 958 maintenance schedule, that's not done until 160k miles or 16 years. Plus, the price of tranny fluid for the Aisin 8-speed is absolutely outrageous; $54/quart.

//greg//
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Old 12-15-2013, 11:27 AM
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Durametric read temperature on the 955. Beyond that 10 minutes of idling in drive warms the oil above 40 degrees C. The whole point of temperature monitoring is to make sure that the thermostat is open to the oil cooler. As such too hot is not a problem. Not hot enough is the challenge.
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Old 12-15-2013, 12:02 PM
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ndx
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You want to add transmission fluid between 35-45 so its not expanded to much.

Just proactive maintenance.

Porsche fluid comes in VW bottles at 34$ for a bottle. So not bad.

So you think that Ross tech should be able to read transmission temperature ?

Thank you
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Old 12-15-2013, 02:27 PM
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Fluids don't expand (measurably). Not sure on rosstech.
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Old 12-15-2013, 06:08 PM
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I believe ndx is correct. ZF's manual for servicing the 6HP-26 & 5HP-24 (I know ours is Aisin but the fill procedure is almost identical) say's you are warming the fluid for expansion and the fill plug needs to be replaced at the correct temp so the fluid doesn't expand too much and the level therefore too low.
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Old 12-16-2013, 02:41 PM
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I'm still waiting to understand why someone is changing ATF on a 958.

NDX - has the vehicle actually accumulated 160,000 miles already? If yes, I'm wondering if dealer service is not more realistic. I'm pretty handy around cars, but this one is a task that I'd be reluctant to tackle on my own. Besides the filter/gasket/O-ring/seal, there's the Aisin-specific J-shaped fitting that's required to drain all 10 liters (at $54/liter I might add).

//greg//
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