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aclandis · Joined: 04 Oct 2008 Posts: 64 Location: california Pa.

the transmission and differential both use the same oil ,so i thought. I figured i would drain the oil from the bottom hex bolt, fill from the side. the book says 2.64 qts of 80w 90 oil. I wanted to see if it was leaking so i opened the top first to see if it was close to the hole and a lot of oil came out.

aclandis · Joined: 04 Oct 2008 Posts: 64 Location: california Pa.

I should prob ask the question, what did I do wrong.. not know or did someone somehow overfill it and why. Thanks for the time

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

Good question. . .my snail didn't hold as much as the manual said, either. I barely got two quarts in there and it started spewing out the fill hole just as you described.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

emoore924 · Joined: 13 Apr 2004 Posts: 2822

Yeah, you just fill it until extra oil starts coming out then stick the fill plug in quick.

I recently had a G31 tranny on the ground. I pulled the drain plug and about 2 liters of oil came out. Then I tilted the nose of it up at about 30 degrees (well beyond what you could do with it in the car) and another 1/4-1/2 liter came out.

I think it would be hard to overfill. But, there is an air vent on the top that allows for expansion of the oil when things get hot. If you get too much in there, I guess you could get oil out the vent but I've never heard of that happening...

I wouldn't worry about it. Just fill it as much as you can and stick the plug in quick.

aclandis · Joined: 04 Oct 2008 Posts: 64 Location: california Pa.

thank you both for the quick replies, and once more to clarify the fill hole is on the side.

emoore924 · Joined: 13 Apr 2004 Posts: 2822

yep, fill plug on the side, drain plug on the bottom..., both 17mm hex.

For future adventurers: ALWAYS remove the FILL plug FIRST, then the drain plug. Those pesky fill plugs have a way of sticking, especially *after* you've drained all the gear oil out

Brockoli · Posted: Wed Feb 11, 2009 8:20 am Post subject:

thats funny you mention that emoore924. Thats what happened to me. I had to make a tool to get the fill plug out because the allan key was bending and I think it broke.

I found 2 17mm bolts and welded them onto a appropriate bolt. I think that bolt even twisted a bit.

Remember to torque the fill plug to the proper specs so you dont have this problem again!
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'80 924 M471,Wideband O2, Full coilover susp,23/19 sways,Bilstiens,KLA Strut Brace,Roll Bar,Test Pipe,BBS RS, Willwood BBK

25% of a '87 944 Chumpcar http://straightpipe.ca/forums/showthread.php?t=2454

'79 924 Sebring Edition(Sitting)

Chrenan · Joined: 15 Jan 2003 Posts: 3903 Location: Canada

I always put anti-seize on the fill pugs as well, makes them easier to remove next time.
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1987 951 - M193 Version for Japan

RC · Joined: 25 Mar 2007 Posts: 2637 Location: Australia

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

And not too tight. . .its pipe thread.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

CorsePerVita · Joined: 25 Jul 2008 Posts: 1992 Location: Redmond, Oregon

what transmission fluid does everyone recommend?
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- 1977 Porsche 924 2.0 N/A (Trackday Project)
- 1979 Porsche 924 2.0 N/A (The other daily)
- 1980 Porsche 931 (Daily)
- 1987 Lamborghini Jalpa
- 1999 Ducati 900SS

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

I put Royal Pee in mine.

It's purple.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

924RACR · Posted: Fri Feb 13, 2009 10:57 pm Post subject:

I've been very happy with Redline products in mine, both the racecar and the turbo (street).
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

mehall · Joined: 15 Dec 2008 Posts: 191 Location: Richmond, MO

Amsoil. It's the ONLY true synthetic on the market. The rest are all dino based, and will overheat and break down far faster.

A bit pricy, but you will run faster, and get better mileage. I have used the product since the mid 70's in many vehicles, and always got superb performance. They make any kind of lubricant you want.

You can find a local dealer/jobber in your yellow pages, or by going to http://www.amsoil.com

Disclaimer: After all these years, I signed up as dealer last night.
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Mark

'87 White 924s manual
'94 Lexus LS400

www.kcws.org

CorsePerVita · Joined: 25 Jul 2008 Posts: 1992 Location: Redmond, Oregon

what about for the old 4 speeds like in my 77' i'm having a hell of a time finding anything, what do you recommend for those and what weight?
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- 1977 Porsche 924 2.0 N/A (Trackday Project)
- 1979 Porsche 924 2.0 N/A (The other daily)
- 1980 Porsche 931 (Daily)
- 1987 Lamborghini Jalpa
- 1999 Ducati 900SS