oil for 915 transmission Question

[tom1975]

My good friend has an Alfa Romeo Spider and Ferrari 308 from the 70 and he uses his gearbox WITH ATF oil of GB company.
I told him that I have a problem sometimes transfer from first to second gear, he advised me before I came in for repairs and replacement of gear sync to try this oil even though it is designed for automatic gearboxes.
He says he uses this oil for about 5 years and I immediately feel the difference.
What do you say?
Does anyone have experience with this oil?
By the way I'm from Israel and I mention this because of the warm weather prevails here
Thank's
Tom

[TheSt|G]

No.

[GH85Carrera]

Never in my 915.

[JJ 911SC]

לא

[RedCoupe]

It not just that the synchros of the 915 were never designed for such a light oil, it's that the Porsche ring and pinion needs a GL5 hypoid oil and could NEVER stand up with just ATF. Transaxles that use ATF for lubrication are for transverse engined FWD cars without hypoid gearsets.

[tom1975]

Ok, thank you !!!
I thought so too, so I consulted with you guys,
There is oil that you recommend that can fix the problem first to second gear transfer?

[JJ 911SC]

Without starting yet another oil thread controversy... Swepco or Kendall.

If you are using one of them, try the other.

http://www.pelicanparts.com/cgi-bin/ksearch/pel_search_2014.cgi?SUPERCAT_FLAG=Y&make=POR&Context_make=&please_wait=N&LastVisited_input=911M&Previous_Section=&forumid=8&threadid=337969&command=DWsearch&description=transmission+oil&I1.x=-259&I1.y=-108

[tom1975]

תודה מלך
thanks

[Trackrash]

What oil are you using now in your 915?
How does your trans shift when cold? Does it shift better when warm?
Cannot Get Kendall In Australia for my 915 what should I buy?
Recipe for Best Shifting 915
G50 and 915 Fluids
I use Swepco, but others prefer Kendall.

[tom1975]

I should clarify, I swapped in the United States last year at Don Jackson in Arizona, before importing the vehicle to Israel.I'll ask him,
The problem in my gearbox is when I move quickly from first to second gear then there creak,
If I move slowly with a slight delay so everything is fine.
The rest of the gears are perfect, I also lowers gears no problem,
There is a problem only to transfer the first gear into second.

[gamin]

Kendall NS-MP 80-90 or Swepco 206(?). I use Kendall in the 70.

[Drisump]

Originally Posted by tom1975

I should clarify, I swapped in the United States last year at Don Jackson in Arizona, before importing the vehicle to Israel.I'll ask him,
The problem in my gearbox is when I move quickly from first to second gear then there creak,
If I move slowly with a slight delay so everything is fine.
The rest of the gears are perfect, I also lowers gears no problem,
There is a problem only to transfer the first gear into second.

Every 915 that I've ever driven does not respond well to "quick" gear changes of any kind (mine included). My 915, if driven with respect and attention to rev matching, is a very nice, smooth shifting transmission (even during spirited driving). Within the lineage, the G50 has a much more modern feel, and is more tolerant of faster shifting and insensitive usage.

[Peter Zimmermann]

Originally Posted by tom1975

I should clarify, I swapped in the United States last year at Don Jackson in Arizona, before importing the vehicle to Israel.I'll ask him,
The problem in my gearbox is when I move quickly from first to second gear then there creak,
If I move slowly with a slight delay so everything is fine.
The rest of the gears are perfect, I also lowers gears no problem,
There is a problem only to transfer the first gear into second.

You must not expect the transmission to adjust to you; it is you who must adjust. Drive the car the way it's telling you that it wants to be driven, and be happy with that. Do not ask your trans to do something that it cannot do. Speed shifting is for Mustangs and Corvettes, NOT 915s!

[Lapkritis]

You're better off with a generic store brand, conventional gear oil than a fancy modern synthetic. What is most expensive isn't always best for the application which goes against what many of us learn when owning these things.

[DRACO A5OG]

+1 what master Peter wrote.

If you can find it, locate some Dow Corning MOLIKOTE, drain the gear box about 3 ounces and replace with the MOLIKOTE. It will reduce the temps of the gear box and not adversely affect the gear box or the gear lube. On the next gear lube change just place 1.5 ounces of Molikote.

Please don't put ATF in the gear box. Now ask your friend to show you what his drained ATF looks like on the next change. I think you will be quite surprised. All that glitters is not gold :-D

[RedCoupe]

Originally Posted by DRACO A5OG

+1 what master Peter wrote.

If you can find it, locate some Dow Corning MOLIKOTE, drain the gear box about 3 ounces and replace with the MOLIKOTE. It will reduce the temps of the gear box and not adversely affect the gear box or the gear lube. On the next gear lube change just place 1.5 ounces of Molikote.

Please don't put ATF in the gear box. Now ask your friend to show you what his drained ATF looks like on the next change. I think you will be quite surprised. All that glitters is not gold :-D

The Porsche synchronizer system is pretty sensitive to the lubricity of the gear oil, hence all the discussion about Swepco vs. Kendall. Although Molikote might do wonders for the R&P, IMHO I wouldn't add it as out of concern for the 915 synchros.

[Matt Monson]

Pete describes it well, but isnt explicit enough. The 1-2 shift on a 915 requires the pause that you have discovered. Use it.
Does your gear oil even need changing yet?

[Steve@Rennsport]

Originally Posted by Peter Zimmermann

You must not expect the transmission to adjust to you; it is you who must adjust. Drive the car the way it's telling you that it wants to be driven, and be happy with that. Do not ask your trans to do something that it cannot do. Speed shifting is for Mustangs and Corvettes, NOT 915s!

Thank you, Mister Pete!!!!

This has been my message to all 915 owners since 1974. The ones that don't listen to your sage advice are the folks that will take a BIG hit to the wallet.

After paying the bill, they are much more amenable about listening.

[Sboxin]

Originally Posted by tom1975

I should clarify, I swapped in the United States last year at Don Jackson in Arizona, before importing the vehicle to Israel.I'll ask him,
The problem in my gearbox is when I move quickly from first to second gear then there creak,
If I move slowly with a slight delay so everything is fine.
The rest of the gears are perfect, I also lowers gears no problem,
There is a problem only to transfer the first gear into second.

Agree with Pete, Matt and Steve . . .

We also use Don Jackson in Phoenix for our race car 915 - - Sepco non synthetic works fine.

Enjoy your 911 . . .

Regards,

[911s55]

Guy goes to the doctor and says "it hurts when I do this", doctor says, "don't do that".