Ready to do some tuneup work today but forgot about trans fluid. Pelican shows 75/90 gl-5 is Royal Purple good? Need to find some thing local this morning. Tia!

 

Id do a search on Renn and here,,i used swepco 201 and cannot tell any difference between factory fill..
don't forget to take fill plug out first, just sayin.

 

I used Redline and am happy. That said I didn't notice any difference. Neither an improve or degradation in performance.

I've heard just as good things about Royal Purple and I've heard that Porsche factory fluid is more expensive than gold bars.

 

If you live in freezing climates and your car gets driven in winter, I'd keep with the OEM fluids. Otherwise if your syncros are in good condition, any of the ones mentioned should suffice.

 

Thanks for the replies! Wound up using Royal Purple. Fill plug was on TIGHT!