2nd gear, hard to shift after tranny oil change

[FauxDiablo]

Originally Posted by Erik Johnson

If you used a synthetic oil on your last change, get that out quickly. This may at least buy you some time on your rebuild. Once the synchronizer starts to die it will do exactly what you are describing, work well once it is hot but not so well cold. This is due to the fact that the metals swell with heat and the tolerances tighten up again to allow that synchro to get a good bite on the dog ring collar again. It will get worse though.

I am gonna have to call BS on this theory.

The reason that a transmission would be easier to shift after it warms up is that the viscosity of the oil improves, gets runnier with heat. This lets the synchros hunt as they should, instead of spin around, stuck to the assembly

The metal parts do not shrink or expand in such a way that they bind and cause things to be harder to shift. Porsche tolerances are tight, but not THAT tight!

Yes, having badly worn synchronizer rings is not going to help either.

[Gelbster]

Erik is correct in terms of the long term prognosis and it is the accepted conventional wisdom of the Forum. But perhaps they are all babbling fools?
Erik's polymer chemistry may be a bit shaky but he is helpful gearbox mechanic not a chemist !.
What he mean't(I think) to say is perhaps the friction modifiers in the unique additive pack for this "Porsche- spec " Spirax may have a critical function.That additive pack is unique to this spec of Spirax.
The ultimate authority (certainly not me!) on this issue is probably GBox or Forum Members GTgears and JFP. They have previously contributed to discussions on this subject very clearly and in detail.
I mention this so people reading this subject for the first time Search on the 6 speed lubrication subject before they damage their gearbox by using the wrong oil and thinking they dodged the Porsche tax.They might. But they'll get fined for tax evasion!
That said, neglecting the routine gearbox lube change could eventually cause more damage than using a generic oil ?
Without a CMS Shift Arrestor some say any 6 Speed is doomed so perhaps the whole discussion is moot ?