I have had RP and RL in my tranny. Both were good and quiet. Can't tell much difference between the two. Liked both better than Mobil 1 gear lube however.

 

I ran RP 85w140 MaxGear for a while before switching to Redline SPH, but that was only because the latter was $4 cheaper per quart. Like Pumba11, I can't tell the difference and would recommend either as top-tier lubricants, the choice going to whichever is cheaper and more readily available.

SEC rules!

 

SEC rules!

 

I use Redline in the tranny, Royal Purple in the primary and Mobil 1 in the engine.

If it ever leaks, I'll know by the color where it is coming from ...

 

Wanted to let you guys know that I contacted Royal Purple via email and the tech department said that the RP Max Gear 75W-140 is a good choice from their products to use in our bike's trannys. Of course you can also use the RP Max Cycle 20W-50 synthetic motor oil in all 3 three holes as HD says you can with any 20W-50 synthetic motor oil.

 

Redline 75-140 and ATF -
Tolerates the high heat of Atl, smooth shifting, and the clutch works better than anything else I ever tried.

 

I've used RP synthetic, Valvoline dino and NAPA dino gear oils in my transmission. Various viscosities. They all work well for me. Whenever I drain the oil they all look like they haven't been used. Haven't seen or felt any difference except in my wallet.

I guess I don't seem to care what it is, as long as it's gear oil.

 

I'm running Redline Shockproof in my tranny and have been very happy. I haven't drained it yet though.

 

+1 on the Redline shockproof. Really smoothed out the 'cluck' in mine.

 

Yes, that "clunk" is a beast in mine and what I am hoping to tame a bit.

Where are you guys buying the Redline Shockproof from?