BOWHIKER
Junior Member
I DON'T KNOW WHAT TO BELIEVE AND NOT TO BELIEVE . AFTER READING AND LISTENING TO OTHER FORUM MEMBERS I PUT SPECTRO HD PLATINUM 75/140 IN MY TRANNY AT 1700 MILES , SO FAR I'VE BEEN HAPPY WITH IT . NOW harleyflhrs posts about the 6 speeds having problems and says to run dyno oil in the tranny , I'm guessing that if you have a problem with your tranny and they see you weren't running the HD formula transmission oil they wouldn't warranty it . I guess I'm confused as what to use , my thoughts are the spectro is superior oil and shouldn't have to worry about it , but this fall when I change the fluids do I go back to the HD oil or stick with the Spectro .