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View Poll Results: Which tranny oil
Mobil 1 14 77.78%
Redline 75W90 1 5.56%
Other 3 16.67%
Voters: 18. You may not vote on this poll

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G50 gear oil

I searched, but most of the discussions seem to center around 915 boxes. The 944 seems to like Redline 75w90 gear oil, but I saw a few mentions for Mobil 1 for the G50. So what do you guys use? One work better than the other? Anything else?

Stef
Old 02-12-2004, 09:49 AM
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redline

When I bought my car it had Mobil 1 in the G50, did not like the way it performed, seemed a little clunky. Switched to Redline 75-90 and shifts smoother. I have used Redline gear oils in 3, now 4 different manual trans. and had good luck with all of them.
Check to make sure you get the right GL# as all gear oils are not the same. For more info on that cheeck out the redline website.
Old 02-12-2004, 10:02 AM
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I have an 87 w/ g-50 and recommecnd the Red Line also but there is a differance. get the 75/90 ns instead of the regular 75/90.

Keith Epperly 87 turbo look slant nose carrera cabriolet
Old 02-12-2004, 10:48 AM
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I've used Swepco and Mobil 1 so far. Mobil is far better and less noisy.

Next change I plan to try Redline. Had good results with that stuff in my Laser. A guy from Redline recommended a blend of different Redline gear oils for my G50 911 and the Laser.

For the G50 I believe he recommended 1 qt. Lightweight Gear Oil (which is a 75W/80W GL-5) and the remainder 75W/90NS (has no friction modifier/additive), regardless of whether you have a LSD or not. He claimed that the Porsche ZF clutch pack-type limited slip differentials don't suffer from chatter like other LSD's do. The NS fluid also is claimed to allow faster synchronization. I believe the Lightweight Gear Oil recommendation is to help cold shifting?

http://www.redlineoil.com/frames/gearoil.htm

http://www.redlineoil.com/redlineoil/gearolti.htm
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Old 02-12-2004, 11:09 AM
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Just be careful as most Redline products are GL-4 rated...you need GL-5.
Some Redline products are GL-5.

---Wil Ferch
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Old 02-12-2004, 12:16 PM
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Quote:
Originally posted by Wil Ferch
Just be careful as most Redline products are GL-4 rated...you need GL-5.
Some Redline products are GL-5.

---Wil Ferch
Thanks for the reminder, but I got that. Basically their manual transmission products are GL4 and the gear oil products (for transaxles) are GL5.

Stef
Old 02-12-2004, 02:52 PM
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According to the service manual that came with my 87 Targa it should be 75-90W GL-5.
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Old 02-12-2004, 06:49 PM
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