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Which oil for 915 tranny is the best?
Please let me know your opinions for what oil or mix is recommended for everyday driving.....
The tranny is in good condition and shifts nice and smooth if I don't force it into first like crazy. Well, you simply don't force a 915 at all, right. Ingo
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1974 Targa 3.6, 2001 C4 (sold), 2019 GT3RS, 2000 ML430 I repair/rebuild Bosch CDI Boxes and Porsche Motronic DMEs Porsche "Hammer" or Porsche PST2, PIWIS III - I can help!! How about a NoBadDays DualChip for 964 or '95 993 |
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07-01-2002, 08:16 PM
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Join Date: Nov 2001
Location: Los Angeles
Posts: 937
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The consensus is Swepco 201... available right here at Pelican Parts...
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Scott |
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07-01-2002, 09:15 PM
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Warren Hall Student
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Ditto, Swepco. The most important thing by far is just changing it on a regular maintenance schedule regardless of the brand. (Don't we wish previous owners had done so.)
Bobby |
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07-02-2002, 12:43 AM
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Information Junky
Join Date: Mar 2001
Location: an island, upper left coast, USA
Posts: 73,189
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I was under the impression that swepco was for after the syncro's are worn and no longer shifting smoothly. . . .kind of a last ditch effort to get the syncro's to grab a bit better. (?)
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Everyone you meet knows something you don't. - - - and a whole bunch of crap that is wrong. Disclaimer: the above was 2¢ worth. More information is available as my professional opinion, which is provided for an exorbitant fee. 
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07-02-2002, 07:10 AM
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Regular changing means once every year from what I understand, correct?
Do people change more often or less based on mileage and/or track (ab)use? Ingo
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1974 Targa 3.6, 2001 C4 (sold), 2019 GT3RS, 2000 ML430 I repair/rebuild Bosch CDI Boxes and Porsche Motronic DMEs Porsche "Hammer" or Porsche PST2, PIWIS III - I can help!! How about a NoBadDays DualChip for 964 or '95 993 |
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07-02-2002, 08:24 AM
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Warren Hall Student
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Once a year is what I do for all my cars. I would imagine the racing crowd changes more often. Maybe someone could enlighten us. Jack, Randy, anyone?
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07-03-2002, 03:57 AM
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Join Date: May 2002
Location: Massachusetts
Posts: 480
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Swepco for my 915. Tried Mobil 1 and went back to Swepco as soon as UPS could deliver. I don't think the age or wear concern would move me off Swepco.
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CWL '86 Carrera Coupe '88 Carrera Cab '02 525i Sedan |
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07-03-2002, 04:25 AM
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Location: Shreveport, La.
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Clean
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Robert Stoll 83 911 SC 83 944 |
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07-03-2002, 04:46 AM
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Senior Member
Join Date: Nov 2000
Location: Great NorthWest
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A bit off the subject, but if you do a R&R on the oil, do drop the 915's belly pan and tighten up the shift fork. Also consider getting one of the magnetic plugs for the fill-side plug. And of course as said by better minds than mine do pull the fill plug first as you don't want to find out later that this plug is stuck and you with it!
Also, I go with Swepco at this time. Trans is just rebuilt with about 2K on it. John
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'78 Targa in Minerva Blue |
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07-03-2002, 10:32 AM
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Location: TX USA
Posts: 9,804
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Not a bad idea, John, but a few folks may need a translator!
The cover plate #5 is what John is talking about 'dropping' and the guide fork #6 is what needs to be tightened -- held on by three M6 nuts -- #8! A new gasket will be needed, and be SURE to clean the plate and everything attached to it with brake spray cleaner/degreaser ... before applying blue Loctite 242 to the three studs and torqueing the nuts for the guide fork! It wouldn't hurt to 'treat' the gasket with Loctite 518 before assembly, either! 
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' Last edited by Early_S_Man; 07-03-2002 at 11:06 AM.. |
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07-03-2002, 11:03 AM
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Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
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I am about to replace the gasket (#9), mine is leaking fluid. When i do remove the plate (#5), should the car be in neutral or in a gear, or does it matter? Also, i have been told before, but what is the torque on the M6 nuts(#8) and what i think are M8 nuts(#11)?
As always, input is greatly appreciated.
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Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
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07-03-2002, 11:15 AM
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Registered
Join Date: Dec 1999
Location: TX USA
Posts: 9,804
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Kemo,
Per the '78-'61 spec book ... cover plate M8 nuts get 22-25 Nm, or 16-18 lb-ft. Guide fork M6 nuts get 8-9 Nm, or 6-7 lb-ft. Shifter in neutral would be my choice, but it probably doesn't matter!
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Warren Hall, Jr. 1973 911S Targa ... 'Annie' 1968 340S Barracuda ... 'Rolling Thunder' |
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07-03-2002, 11:35 AM
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Black and Blue
Join Date: Jul 2000
Location: Austin, TX USA - Ya'll
Posts: 2,552
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Warren,
thanks for the info...again! I just had a case of deja-vu...
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Kemo 1978 911 SC Non-Sunroof Coupe, two tone Primer Black and SWEPCO Blue, Currently serving as a Track Whore 1981 911 SC Sunroof Coupe, Pacific Blue Project, Future Daily Driver |
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07-03-2002, 11:58 AM
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Registered
Join Date: Apr 2001
Location: Linn County, Oregon
Posts: 48,531
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 SWEEPCO! (I however, continue to use a synthetic..TORCO 75-140 GL6 with limited slip additive. And I believe the car shifts better & the gearbox internals do better than they did when I ran sweepco. But I sure ain't Bruce Anderson!) |
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07-03-2002, 04:59 PM
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1974 Porsche 911 Targa 3.6
73' Porsche Targa
