Type of grease

[DGXSER]

For the final drive to drive shaft joint. I'm in the process of getting new shoes for ole Thunderstruck and took the final drive off to grease those splines that don't quite get service from the fitting.

The book says to use Molybdenum Disolfide or however the heck they spell that stuff. I got a tube of it for the splines at the rear wheel, but it would take three tubes or more to fill that fitting properly. Is this the stuff to use there or would standard high temp wheel bearing grease be appropriate?

Appreciate any insite!!

[red bandit]

If you are talking about the drive shaft spline to final drive spline you don't need to fill anything up. Just smear some grease on the splines themselves. The grease you have will work just fine.

[DiverRay]

Red Bandit is correct. Just coat the splines and you have plenty. As far as the type of grease, I now use Red Line Synthetic for everything. Any synthetic is far better than the "old" grease. I like it because it is very water repelent, so it will NOT wash out when I ride in the rain. JMHO

[DGXSER]

Thanks Ray, I'll note that in my clymers for next time. I already reassembled the FD to the bike tonight using the Moly lube I had. I have some left for the splines when I put the rear wheel back on to.

Man, that back tire was done. It was starting to show the inner threads in places!! And definitely started sounding kind of hollow like.

[Ivan]

Thanks Ray, I'll note that in my clymers for next time. I already reassembled the FD to the bike tonight using the Moly lube I had. I have some left for the splines when I put the rear wheel back on to.

Man, that back tire was done. It was starting to show the inner threads in places!! And definitely started sounding kind of hollow like.

I have a nice harley branded white wall for you.

[dbeardslee]

Don - So you got a tube of moly (I can't spell it either )? Where'd you find it? I had to settle for 3% moly grease, and I'd rather have a much higher percentage in that spot.

[DGXSER]

Doug, I got it at Cycle Specialties which is just up the road form my house. It was about $10 for the tube IIRC. As of now, both the FD to shaft and FD to wheel are coated but thick with it.

Ivan, you know as tempting as that offer is, I got a feeling if I put something with HD on ole Thunderstruck she might buck me off!! That and I could not sleep at night knowing that was on there. Ohhh...but it looked good on YOUR bike though!!! (in my best Rodney Dangerfield voice)

[randy]

A few years back i picked up a pack of Yamalube at the local dealer. it is a three-pack of the small tubes that fit in the small grease gun, something like $15 for the pack. It is the stickiest @#%& I've ever used, hard to wash it off anything. Seems to be holding up well, each year I check at it's still right where I put it.

[rman]

WE use this stuff at work. Works great on our antennas. I think the selling point of the Molybdenum disulfide grease is that it tends to stay put.

AEROSHELL Grease 17 is a fully synthetic grease containing 5% molybdenum disulphide. It is particularly suitable for lubricating heavity loaded sliding surfaces such as bogie pins on aircraft landing gear assemblies over the temperature range of -73 °C to +149 °C.

Product Code 519-025 ASTM Method
Colour Dark Gray Visual
Thickener Microgel Spec
Dropping Point, °C +260 D 2265
Penetration @ 25°C Unworked 287 D 217
Penetration @ 25°C worked 295 D 217
Useful Temp. Range, °C -73 to +149 EST
Water Resistance, loss %m 1.0 D 1264
Bomb oxidation @ 98.9°C Press Drop @ 100 hr, kPa 55 D 942
Bomb oxidation @ 98.9°C Press Drop @ 500 hr, kPa 103 D942
Mean Hertz Load, kg - D 2596
base Oil Type Synthetic Spec
Oil Viscosity @ 98.9°C 3.1 D 445

Meets MIL-SPEC: MIL-G-21164

[dbeardslee]

The thing about the molybdenum component is that it bonds with the metal, so even after the grease has dried out it still provides lubrication. As you cannot easily get at the spline on the driveshaft, and zerking the fitting won't get it where it needs to be, a high concentration of moly is desirable in this location. Might be why the Yamalube is so sticky, too.