Transmission grease

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cmnyj28
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Transmission grease

Post by cmnyj28 » Thu Mar 07, 2013 10:33 pm

Do you grease the gears in the transmission?

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oarie
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Post by oarie » Thu Mar 07, 2013 10:46 pm

I don't personally but I've seen people use a small amount of lithium grease or silicone lubricant inside the trans without issue.  I'm sure opinions on this will vary but HPI doesn't put any in there from the factory and the transmissions are pretty robust right out of the box IMHO.  I would recommend if you do use anything keep it as thin as possible.  Don't use the heavy grease such as that used in the diffs.
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cmnyj28
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Post by cmnyj28 » Thu Mar 07, 2013 10:52 pm

I wasn't gonna put a lot, just a little.

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Post by oarie » Thu Mar 07, 2013 11:21 pm

The rule of thumb I hear most is no grease on exposed gears regardless of what they are made of and enclosed gears that are all metal get greased.  Enclosed plastic on metal gears do not.  I can't really say how true these statements would hold throughout the R/C world but it seems to be what I've come across in my own experiences and it does seem to work for me.
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cmnyj28
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Post by cmnyj28 » Thu Mar 07, 2013 11:33 pm

makes sense, I just feel my gears in the flux are a tad loud..and a little Lube would help a bit

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Freebird
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Post by Freebird » Fri Mar 08, 2013 1:29 pm

I wonder if a little graphite would be of benefit?

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Post by s2022 » Fri Mar 08, 2013 2:06 pm

I used to put oil in the center tranny, really did a good job. don'y fill it up, just to cover some millimeters from the bottom gear, and it will take care of getting the oil flinging every where. But the seams get messy and dirty from the dust and dirt clinging on the oil that leaked out. but from the inside the gears were mint.

But all in all definitely don't keep them dry, any of the methods mentioned is definitely better than dry
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Post by carmaster65 » Sat Mar 09, 2013 1:45 am

I ran a thin coat of hpi grease that comes in the white tube on my flux tranny. It's the same stuff used on the diff gears so I figured why not. It made the tranny feel a whole lot smoother and a fair bit quieter. That is just from spinning the shaft by hand on the bench, I haven't run it yet. Someone posted that the new 2013 Savage comes with a greased up tranny now.

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Post by Purenitro » Sat Mar 09, 2013 12:42 pm

The transmission is designed to run dry, that way any wear results in dust that can settle to the bottom of the case. Putting any lubricant on the gears will cause this dust to stick and act like an abrasive which in turn will wear the gears faster, imo :D
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Post by carmaster65 » Sat Mar 09, 2013 1:02 pm

I should clarify I built the 5SC Flux tranny, all the gears look like the lightweight hardened versions.

I found this on a UK Hpi forum talking about the flux hp tranny

"Hi all,

I spoke to the Tech support guys in the UK and was told that the gears within the tramsmission are made from different materials and are therefore self lubricating. No oil or grease is required. Hope that helps "

Looking at a flux tranny all the gears look the same too.

I also read where people lubed their 2speed trannys and it gummed up the shifting clutch.

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BIRDMAN1622
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Post by BIRDMAN1622 » Sun Mar 10, 2013 2:18 am

I use amsoil heavy duty lubricant spray, it's designed for motor cycle chains, and doesn't sling off like grease, or attract dust.. Etc.  

Works well..

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Post by LLkoolskillet » Sun Mar 10, 2013 7:55 am

You can actually harden sintered gear by oil quenching it and it will become a self lubricating gear.
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Post by AnthonyShane57 » Sat Mar 28, 2015 7:28 am

I have ran bearing grease in every single one of my MT bashing racing or ridding wheelies down the street. Not a lot but enough to have a nice coating on all the gears. And i have no had any problem with dirt in the gear box. It cuts down on the friction in the gears which causes less stress and wear on the bearings.

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Post by redbeard_ron » Sat Apr 11, 2015 3:43 pm

i use open gear grease in diffs and put a spray graphite on my tranny gears.. the graphite spray never wears off and dont attract dirt at all. the open gear grease stays on the diff gears until u clean it off with a good degreaser.

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Post by GhostbikerNL » Mon Apr 13, 2015 5:35 am

i just recieved a brand new 2 speed from ebay, opened it up, and there was a lot of grease in it, the tranny was from a brand new rtr x 4.6 truck from jenny's rc,
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