Lynn Larsen
Lynn Larsen
I found this piece of advise on the Rennsport Systems Website There is other very good information here like the 3 manufacturers of LSD units: ZF, Quaife and Guard Transmission.
Oils are always a subject of opinion and controversy. Everyone’s opinion is based upon personal experience. The more experience one has in the area in question, the more weight we give to the opinion being offered. In our experience, the 901, 915 and 930 transmissions seem to shift and operate better with non-synthetic oils. The Porsche designed balk-ring syncromesh needs more friction to operate smoothly than synthetics provide. We use and recommend the Swepco line of gearlubes for these gearboxes. They simply shift better than any other oils that we have used. The G50-series trannys, on the other hand, really work well with a full-synthetic gearlube like Mobil 1 or Redline. The Borg-Warner type syncros work better with a real slippery oil. We do not use or recommend any transmission additives besides the LSD improvers sold by GM dealers for the times that you need to eliminate LSD-clutch chatter in the ZF LSD (other LSDs are gear type.)
Regards,
Lynn
Oils are always a subject of opinion and controversy. Everyone’s opinion is based upon personal experience. The more experience one has in the area in question, the more weight we give to the opinion being offered. In our experience, the 901, 915 and 930 transmissions seem to shift and operate better with non-synthetic oils. The Porsche designed balk-ring syncromesh needs more friction to operate smoothly than synthetics provide. We use and recommend the Swepco line of gearlubes for these gearboxes. They simply shift better than any other oils that we have used. The G50-series trannys, on the other hand, really work well with a full-synthetic gearlube like Mobil 1 or Redline. The Borg-Warner type syncros work better with a real slippery oil. We do not use or recommend any transmission additives besides the LSD improvers sold by GM dealers for the times that you need to eliminate LSD-clutch chatter in the ZF LSD (other LSDs are gear type.)
Regards,
Lynn
