Transmission Oil

[redcar]

Have never changed the oil (gear lube) in my transmission -- what brand/viscosity is recommended? Thanks, Bob

[RSTarga]

if you have a few hours
http://forums.pelicanparts.com/porsc...vs-swepco.html
Either Swepco or Kendall are very good oils

[304065]

what box?

901, 915, G50?

The answer varies with what you have.

[redcar]

1971 S with 901 box.

[304065]

Swepco 201.

[lemonlib]

How about the 915 gearbox?

Thanks
Lemon

[Mr9146]

For steel synchro boxes (901, 915, 930) I prefer a dinosaur-based 80/90 ... in some cases even straight 90.

For brass synchro boxes (G-50 and later) I use Redline 75/90NS and, if there's an LSD involved, add Redline friction modifier to suit.

[MountainRoads]

1971 S with 901 box.

+1 on the Swepco 201 (Blue). My mechanic recently told me that Swepco 210 (Red) is "the same" as Swepco 201 with Swepco ATF added. Anybody care to confirm or contradict this assertion?

- MR

[redcar]

Thanks for the input and guidance.

Bob

[mikael]

Marco, what do you recommend for a 901 box with original LSD? My papers say Shell S 17 47 A but that doesn't seem to exist anymore. Anything that corresponds? Thanks!

For steel synchro boxes (901, 915, 930) I prefer a dinosaur-based 80/90 ... in some cases even straight 90.

For brass synchro boxes (G-50 and later) I use Redline 75/90NS and, if there's an LSD involved, add Redline friction modifier to suit.