I just changed to a braided clutch cable and I was going to go ahead and change my tranny fluid. I have a 97 Road King and I was wondering what type of fluid to run in the tranny. From what I could find here on the forum, I think 75W 90 gear oil is the way to go. Does that need to be synthetic, or dino oil? Also, where on the dipstick indicates full, I only have a notch around my dipstick in one place. Above this, below this, or right at this mark? I have done several searches, but cannot find specific info. Thanks in advance for the help.

 

75w90 gear lube or close to that and GL5 is just fine for it. It does not matter whether it is synthetic or regular. I personally have used 80w90 non-synthetic gear lube for thousands and thousands of miles on Harleys without any trouble whatsoever. I don't pay attention to the mileage on the transmission though...as I change it once a year anyways. It is always clean when I do change it as well.

Right off, I believe it takes almost one quart for the transmission and it is checked on the side stand. It should come to the mark on the dipstick.

 

Thanks...I wasn't sure about the sidestand, or not. I am glad you mentioned that. Not much help anymore for us Evo boys!

 

I use Bel-Ray. I've got a friend with 350,000 miles onhis 74 FLHPand he's used nothing but Bel-Ray in it and he's never had to open it up.

 

I use Red-line shockproof heavy. I think it makes a difference. Quieter and smoother shifts.