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Grease recommendations for RC car differentials #4690301
03/10/18 09:31 AM
03/10/18 09:31 AM
Joined: Aug 2009
Posts: 27
Ohio
TAP Offline OP
TAP  Offline OP
Joined: Aug 2009
Posts: 27
Ohio
I've got several 1/8 scale RCs that need their metal gear differentials cleaned and relubricated. Unfortunately the grease I would like to use is over $10 for less than an ounce of it. Many RC lubricants are relabeled products from the bike and automobile space so hoping I can find something comparable at a lower price. Each differential consists of (2) sun gears and (4) satellite gears in a cross formation.

Some basic requirements for the grease:
Needs to be sticky to resist fling off. Mobil-1 grease flings right off so need something much stickier.
Needs to be thicker than Mobil 1. A thicker/more vicious grease will reduce the differential action which is desirable in my application.
O-ring safe. There are rubber o-rings sealing the diff cases so the grease has to be o-ring safe.

Any suggestions on a grease that might fit this application would be greatly appreciated.

Todd

Re: Grease recommendations for RC car differentials [Re: TAP] #4690315
03/10/18 09:49 AM
03/10/18 09:49 AM
Joined: Dec 2011
Posts: 4,738
North Carolina
rooflessVW Offline
rooflessVW  Offline
Joined: Dec 2011
Posts: 4,738
North Carolina
Valvoline SynPower grease in the black tube is what I'd use. Moly-fortified and my 5 year old tube hasn't separated at all. It's plenty thick to boot. Unless you get it pretty hot I don't think you'll have issues with it.


"Zed's dead baby, Zed's dead."
Re: Grease recommendations for RC car differentials [Re: rooflessVW] #4690336
03/10/18 10:11 AM
03/10/18 10:11 AM
Joined: Aug 2009
Posts: 27
Ohio
TAP Offline OP
TAP  Offline OP
Joined: Aug 2009
Posts: 27
Ohio
I have that grease and I like it alot but it's not thick enough for the center differential on my truck. I need something that is a bit more vicious to reduce the diff action and keep the power from unloading to the front wheels. Admittedly I haven't tested it in a diff, but doing the finger test it doesn't appear to be heavy enough. The finger test could be a poor way to determine if its the correct oil.

Re: Grease recommendations for RC car differentials [Re: TAP] #4690359
03/10/18 10:39 AM
03/10/18 10:39 AM
Joined: Jul 2009
Posts: 597
texas
danez_yoda Offline
danez_yoda  Offline
Joined: Jul 2009
Posts: 597
texas
Lucas red and tacky.

Sticks really good but seperates in the gun. Put it in a tub or just buy a tub if it.

Re: Grease recommendations for RC car differentials [Re: danez_yoda] #4690368
03/10/18 10:45 AM
03/10/18 10:45 AM
Joined: Aug 2009
Posts: 27
Ohio
TAP Offline OP
TAP  Offline OP
Joined: Aug 2009
Posts: 27
Ohio
Originally Posted By: danez_yoda
Lucas red and tacky.

Sticks really good but seperates in the gun. Put it in a tub or just buy a tub if it.


I've heard others recommend that grease in the rc forums. Any idea if it's o-ring safe?

Re: Grease recommendations for RC car differentials [Re: TAP] #4690372
03/10/18 10:52 AM
03/10/18 10:52 AM
Joined: Oct 2012
Posts: 2,107
Northern Ontario, Canada
Danno Offline
Danno  Offline
Joined: Oct 2012
Posts: 2,107
Northern Ontario, Canada


2016 Sorento SX V6 AWD
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Re: Grease recommendations for RC car differentials [Re: TAP] #4690380
03/10/18 11:08 AM
03/10/18 11:08 AM
Joined: Jan 2012
Posts: 80
Ontario, Canada
Planb Offline
Planb  Offline
Joined: Jan 2012
Posts: 80
Ontario, Canada
When I raced, we would fill the diff with a heavy silicone fluid, this was done to prevent the unloading of the inside wheels when going around a turn, think of it as a easily adjustable torson differential.


Team Junk
Re: Grease recommendations for RC car differentials [Re: Planb] #4690388
03/10/18 11:17 AM
03/10/18 11:17 AM
Joined: Aug 2009
Posts: 27
Ohio
TAP Offline OP
TAP  Offline OP
Joined: Aug 2009
Posts: 27
Ohio
Originally Posted By: Planb
When I raced, we would fill the diff with a heavy silicone fluid, this was done to prevent the unloading of the inside wheels when going around a turn, think of it as a easily adjustable torson differential.


Yep I use diff fluid in my other vehicle. This particular vehicle doesn't have a sealed diff which is why it requires a grease.

Re: Grease recommendations for RC car differentials [Re: Danno] #4690404
03/10/18 11:32 AM
03/10/18 11:32 AM
Joined: Aug 2009
Posts: 27
Ohio
TAP Offline OP
TAP  Offline OP
Joined: Aug 2009
Posts: 27
Ohio
Originally Posted By: Danno


I have some of this and It's a good grease. I love the fact that it doesn't give off an odor. It's not very sticky which is why I haven't considered it.

Re: Grease recommendations for RC car differentials [Re: TAP] #4690436
03/10/18 12:05 PM
03/10/18 12:05 PM
Joined: Feb 2014
Posts: 2,490
Canada
Lolvoguy Offline
Lolvoguy  Offline
Joined: Feb 2014
Posts: 2,490
Canada
Sure there's many lubricants you can choose from, but I'd be more concerned with it's compatibility with the materials in your RC vehicles.

When I had an RC car, it was the electric type that had vinyl gears. IIRC, the lubricant it used was a water-based grease. shrug


06 Lexus IS350- Wife
88 BMW 325is- Mistress
Re: Grease recommendations for RC car differentials [Re: TAP] #4690485
03/10/18 01:15 PM
03/10/18 01:15 PM
Joined: Dec 2015
Posts: 419
Kentucky
Fsharp Offline
Fsharp  Offline
Joined: Dec 2015
Posts: 419
Kentucky
You might try an open gear grease like Pyroshield syn, but Id also go for the Lucas Red and Tacky. Im not sure any grease will provide meaningful limited slip action for very long. Maybe switch to a ball diff if available?

Re: Grease recommendations for RC car differentials [Re: TAP] #4690491
03/10/18 01:24 PM
03/10/18 01:24 PM
Joined: Aug 2009
Posts: 27
Ohio
TAP Offline OP
TAP  Offline OP
Joined: Aug 2009
Posts: 27
Ohio
The open gear grease is something I just learned about today. Going to look into that brand you mentioned.

Ball diff isn't an option with this truck.

Re: Grease recommendations for RC car differentials [Re: TAP] #4690662
03/10/18 04:51 PM
03/10/18 04:51 PM
Joined: Aug 2009
Posts: 27
Ohio
TAP Offline OP
TAP  Offline OP
Joined: Aug 2009
Posts: 27
Ohio
Going to give this grease a try.

[url=https://www.amazon.com/dp/B000R8EI08/?coliid=I1R389CAX3Z2M2&colid=H3ULXYEUCOAH&psc=0&ref_=lv_ov_lig_dp_it][/url]

Last edited by TAP; 03/10/18 04:59 PM.
Re: Grease recommendations for RC car differentials [Re: TAP] #4690675
03/10/18 05:13 PM
03/10/18 05:13 PM
Joined: May 2012
Posts: 1,400
Georgia
AVB Offline
AVB  Offline
Joined: May 2012
Posts: 1,400
Georgia
I might would try some John Deere corn head grease. I would worry about a grease not acting like a fluid, and the gears just spinning freely while the grease stayed put. I can't remember if any of my 1/8 scales have a center diff, I know I have one for a buggy in a box somewhere.

Cavitation would be what I was trying to describe above.

Last edited by AVB; 03/10/18 05:27 PM.

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