I was just reading on the RL site. It says their heavy weight gear oil 75/250 flows the same as any 75/90 WT gear oil. It also says their VTwin tranny oil with shock proof is the same thing as their heavy gear oil with shock proof. They only sell one VTwin tranny oil. (Run what ya brung.)
It also stated their light weight gear oil is for smaller gear cases ,like on the 2 stroke dirt bikes and Racing cases.
With that being said, I'd think even running their super light weight gear oil with shock proof is better than using
Harley SN3 20/50 in the Transmission.
2010 FLTRX , Stage 1, 13" Madstad, Mono tubes, SuperShox, Heritage style bars. Alpine CDE-HD149BT,Soundstream Picasso Nano Series PN4.520 , 5X7 and 6.5 Infinity Kappa speakers
If I have to explain ,you wouldn't under stand anyway.
Last edited by Big_gary; 04-20-2017 at 04:36 PM.