what is the best fluid to use on my 2004 ultra

 

Bel Ray synthetic is what my dealer recommended for the tranny.

 

I use Amsoil SVG 75W110.

 

i use amsoil 75/90

 

I just had handle bars put on by bike and the mechanic had a few choices for trans. oil. I opted for Amsoil since I had heard good things about it here. I think it was 75/140 Gear oil, but will check tonight for you. Anyway... Wow! What a major change. As soon as I popped it in gear I could tell something was different, in a good way. Feels like a different bike now... very smoothe. I'll be staying with that in my trans.

 

I have been using Mobil 1 GEAR OIL 75/90 or 85/140 for the last 50,000 miles.
Excellent smooth results!

Mobil 1 V-twin in the engine and Mobil 1 gear oil in the tranny.
Motor oil in the motor and gear oil in the gears.

 

Exactly.

"But my dealer (insert: mechanic, buddy, parts man, .....) told me........."

 

Has anyone used: ???

Spectro, Heavy Duty, Platinum Gear Oil, Full Synthetic GL-1, 75w140

 

Then there are some of us who swears by Redline Shockproof Heavy. What ever brand you use, Just use GEAR OIL ! My $.00001 after Stock Market decline.

 

I use Amsoil 75/90 full syn in my 04 Ultra and no worries mate,