PCA SDR

What gear oil do you experts use and recommend for a 915 transmission? The car will be tracked.

After the rebuild put in standard 80w90 GL-5, MT-1 multi-purpose gear oil like Castrol.
After a two day event or about 500 miles drain it and change it to Swepco 201.
Do as much shifting as possible in the break in period, just be smooth as you don't want to overheat the syncros on the track.

The swepco is too slipery for new syncros and they will take forever to break in; that's what the cheap stuff is for.

If it was a mainly a street car I would put in redline 75w90NS.
But the swepco is better for sustained R&P loads.

Thanks, Steve for the info.

What's your opinion of Swepco 212?

201 is the preference for Porsches and other high speed gearboxes.
212 is a 80/140 oil and more for heavy equipment.

I left some Swepco 201 on the ground at Fontana if you need any...