I have a new, well almost new,, 2011 FLHTC.. with 1700 miles on her,, i changed the oil and used the same oil in all three units, engine tranny and primary. i used the 20/50 super duper synthetic kicks butt and all that stuff oil,,,cost me 100 dollars for the oil change i did myself,,,soo that said, on todays ride the tranny sounds clunky when changing gears and also sounds like excessive gear whine,,,so i am asking what oil weight would be best? 80/90? i have good oil pressure and the engine sounds great and did i read some place you guys are running atf in the primary?
thanks in advance,
Jess in 10AC

 

THERE is a whole GIANT Thread on that in the oil section HUNDREDS of opinions .

mobile-1v-twin 20w50 is onsale at advanced auto $7.99 a qt .

in the tranny i use mobile-1 75w140 but thats like $18 a quart . but you don't have to change it as often as the crankcase oil.

 

I use Amsoil Severe Gear 75W90 .

 

thanks for the quick reply,
i am going to go start reading now,,,

 

Same here,it feels & shifts great with it in.

 

That Mobil 1 75w-140 is good stuff. I like it a lot. Even better then Redline Shock proof. It is kinda pricey but what the hell. So is everything else.

 

http://www.redlineoil.com/Products.aspx?pcid=19

Red Line Big Twin 20W60HD PowerPack

$94.95

Red Line Big Twin 20W60HD PowerPack
Looking for cooler operating temperatures, better shifting, less noise and less wear? Red Line's PowerPack includes our latest motor oil for motorcycles, V-Twin Transmission Oil with Shockproof, V-Twin Primary oil for the primary chain case, plus a bottle of Complete Fuel System Cleaner for Motorcycles.

This kit is specific to Knucklehead, Shovelhead, Panhead engines (as well as Big Twins operated in hot climates or with wide clearances). Includes 5 quarts of 20W60 Motorcycle Oil, 1 quart of V-Twin Transmission Oil with ShockProof, 1 quart of Primary Chain Case Oil, 1 bottle of Fuel Injection Cleaner for Motorcycles, a sticker kit, a Red Line Oil embroidered hat, and a versatile funnel.

Please check your owners manual for correct capacity. Some later model V-Twins require an additional 4 oz of... Read More

 

redline shockproof heavy here. great stuff no more clunk and falls into nutral no problem

 

Likewise!

 

+1 on the redline shockproof, and I run redline synthetic in the primary as well.