what oil goes in the transmission classic 2004 road king twin cams 88 thank you

[farmer]

what oil goes in the transmission classic 2004 road king twin cams 88
what are the spec of oil,sae api  80 w 90 gl4 or gl5 or other
thank

[L-]

There are a few but I put in Redline Shockproof Heavy and change it about every 25,000 miles.

L-

[Mike52]

There are a few but I put in Redline Shockproof Heavy and change it about every 25,000 miles.

L-

Great advice, I do the same.

Mike

[bigjon460]

Redline has now changed the name of heavy shockproof,    Now its called manual transmission lube with shockproof. We got in a bunch of cases labeled like this in my shop, called redline they said same product just labeled differently to avoid consumer confussion

[Hillside Motorcycle]

Redline Heavy Shockproof has been the only gearbox oil that we have used here for almost 15 years.

[blown alcohol]

On their website they still list MTL manual transmission lube (I use this in the primary), and they list these under ShockProof Gear Oil - lightweight, super lightweight, and heavy. I use the heavy shockproof gear oil in the transmission. I know they label oil now for vtwins. I have seen MTL for vtwins, and heavy shockproof for vtwins. It's the same oil, just has vtwin added to the label with adjusted price.

http://www.redlineoil.com/products_gearlubricants.asp?categoryID=6&subCategoryID=16

http://www.redlineoil.com/products_gearlubricants.asp?categoryID=7

[harley1450000]

harley fornula plus

[Jeffd]

couple sticks of butter work good.  about any gear oil works too.

[Big Dan]

Redline Shockproof Heavy in mine, for 60k miles. I change it every 3rd oil change. Bike shifts smooth like butter, neutral easy to find, no "clunk" when I drop it into gear. I don't expect I'll ever run anything else.

[GaryD]

03 Ultra w/ SE 6 speed
Amsoil Severe gear 75/140
Amsoil 20/50 summer, 10/40 winter
Harley Formula+ in primary

[Milehog]

It's not a high tech gearbox, just about any gear oil will give good service.
I'm running Amsoil 75/90. If you go with dino gl5 is good stuff and compatable with just about everything. Heavier weights are not necessarily better unless you ride in a hot climate.