Differential Fluid Performance in RC vehicles
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- Опубликовано: 7 июл 2024
- There are typically 3 differentials that can be found on most RC vehicles. The most common differential type in RC is the spider gear type.
The differential operates differently with different weighted oils. An open differential or one that has no viscous fluid in it will allow all motor or engine power to be routed to the tire with the least resistance. This means all the power potential you have will travel to the wrong wheel. In most RC applications, this is not desired.
My recommendation based on my personal driving style in light 1/8 and 1/10 RC cars is to use:
7k cSt in the front differential.
10k cSt in the center differential
5k cSt in the rear differential
Divide by 9 to convert from cSt to wt.
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Man if this guy knew how much help he is esspecially for ppl that's just getting into the hobby perfectly explained I just learned about diff performance just that fast lol ty bro
Hey Wilfred, thanks for the awesome comment!
@@RCexplained my arrma felony has 10k in front 100k middle and 10k rear and my right rear tire goes bald should I do 20k in just front and rear to even leave center to stock 100k
What Best set up for traxxas erevo 2.0 Mine wants to spend that every time I go around the turn
I agree.. no one else explains anything.
We all know what grease does.. duh.
This is real info to make and educated decision.
Hats off to you brother 🔥
Thanks!! Finally someone who who explains every scenario.. big thumbs up
Thanks for your comment EG!
I'm sure he knows and that's why he keeps on doing it. Accurate, informative and reliable information. Thanks again! We should call you Mr. Wonderful for all your efforts in educating us on all things rc 🙏 Excellent every time 👍
perfect video for all the questions I had especially the initial setup for beginners. actually seeing the individual differentials would have been a nice touch. thanks for the video!
Thank you Brian for the comment and suggestion.
i added 200k diff fluid to my redcat landslide 4s last night and boy was i not expecting it to be so loose in the rear,but it was putting a smile on my face because thats kind of what i wanted,great video bro.
Sounds awesome Andy! There must have been a lot of power going to those rear wheels! Nice!
Thank you So Much! Needed this as my purchase arrived dry diffs! Can't wait to oil them up!
Thank you for the clear explanation. Trying to decide on fluid for my Traxxas maxx for my backyard track.
I've been looking everywhere for a clear non convoluted explanation on diff fluid and you nailed it! Thank you so much for taking the time to help educate us. Keep up the good work!
Hey Sean, thanks for you awesome comment! I'm happy to hear the video has helped.
Inst he awesome! Very good!
A great simple explanation on Diff. fluid setup, thank you.
Thank you g2 racing!
@@RCexplained
thankyou man
great info, as always, please keep up the good work, thanks again my pimp.
Thanks for this video. I juts got my daughter a Team Corally Sketer for bashing around with me in my EXB Kraton and my mate with a V5 Kraton and the diffs are so aggressive. On gravel it just spins out even with mild throttle the rear acting like a locker with its 20K fluid causing it to spin out on her. The base set up you suggested is exactly what the Team Corally support said to use. Hopefully these changes will make it way easier to drive.. Keep up the great videos..
So thankful I found this guide, really helps a lot!
Huge help! Thank you.
Thanks for the insight! ✌
These are the best rc vids period. Thanks!
Wow, thanks!
Midway watching, im wondering where to start. Answer comes along, now im wondering WHEN i can start. Thanks man, uv been much help. Keep coming across your channel for RC knowledge. Uv earned a sub 🤟🏽. May u always have joy w RC 👍🏼👍🏼
I read in an rc article heaviest in the front, mid weight in the center and lightest in the rear. As in 500 rear diff, 1000 center diff and 1500 on front diff. This is for aggressive and still have control.
Great info. I’m currently setting my losi 8ight t diffs to 10-10-07
Excellent!
Thank you for this video.
New to the hobby and I just picked up a Sledge & Typhon 6S, thank you for this insightful video!
I drive Sledge one year with stock oils(for bashing it does not matter), i changed few weeks ago for lighter. For not behave so like heavy tank. My current setup is 20K/20K/10K.
Good video, was on topic right from the start and explained in a clear concise presentation.
Hey Darrin, thanks for the comment. Glad you found the video to be clear and on point.
Nice video and very comprehensive!
Yes sir, thank you for this great info.
You are very welcome
Awesome. Thank you!
You're welcome!
So clear and helpful, thank you.
Glad it was helpful!
Wow. Best explanation I have heard. Great details.
Glad it was helpful!
Best rc videos on RUclips
Thank You!
Very helpful and informative!
This is a cracking vid I've been reading up on this as I've got my first buggy that I fancy setting up for racing around I now see there is not really one ideal set up and it needs changing every different surface and it's going to take time to master the number for the different terrain you video is one of the videos that I have watch and can marry up with what I've read so far
Hey rc clan, thanks for the comment. You are definitely correct in that there is no real one ideal setup. I do tend to prefer a specific style regardless of what I am running. However I do change things up if racing a buggy vs an on road car for example.
Very good information! Thank you!
Wildly informative
very informative. well done.
Hey Cyclopsfpv. Thanks for the comment.
THANK YOU!!!
You're welcome!
Excellent. Thank you
You are welcome!
Finally! Someone who didn’t call the spider gears planet gears! Good video man!
Thanks for your awesome comment Joseph!
Awesome vid mate, thanks
No problem 👍
Awesome RCeXplained
Thank you just P. X! Appreciate the comment!
Great Video!
Thank you!
Thanks for all your knowledge
You bet!
Very well explained, appreciated.
Glad it was helpful!
Thanks!
You bet!
Video was perfect👌
Thank you Philly Dee!
Your videos are incredible. I’m learning so much being new to the sport from you. Thank you
Thanks for the awesome comment Mark!
@@RCexplained hey bro, ive been using your videos to increase my knowledge, because they are excellent.
can you recommend a front centre and rear diff fluid set up for truggy :1:8 scale converted from nitro to brushless, running on very high bite surface like tarmac.
your feedback is VERY Appreciated.
What style are you looking for? You could go 20k center. 12k front 7k rear.
@@RCexplained hi bro , many thanks for the feedback, because I'm using this truggy on tarmac, I'm looking for fast acceleration, with some good handling.
I was going to go 7k 15k 4k .
Original set up was 5k 10k 3k.
Once again thankyou bro. Any feedback is appreciated.
My suggestion will give you more bite but can result in too much bite and getting sideways easy. Your selection will be easier to handle the power. Your decision completely depends on what your preference is and then adjust from there.
Great nice video you have answered my question
Glad I could help
😮
Excellent video, liked and subscribed
Thank You Aleksandar !
I was amazed by the diff fluids in my X-Maxx 8s…. Front 10k, Rear 30k and the torque biasing center a whopping 20 million! Crazy! Changing all the diff fluids now.
Xmaxx is a larger RC. My recommendations are for much smaller RCs. If you are looking for different performance, adjust accordingly.
What would be a better centre diff fluid for the xmaxx?
I know nothing about diff oils and I'm looking to learn to tune and understand....this video was so useful...I will have to watch it a couple more times to fully understand....very nice video bro....I have subscribed to support...thanks buddy
Hey Damian, thanks a ton for your comment and sub!
Great video, subscribed because of it.
Thanks for the comment and for subbing!
Very Well Explained Thank You I will be Watching
Thanks!
Weights seem lite. My Mojave comes with 10k 100k 10k . Changing to 50k 200k 30k
-so good, I came back to watch again. Thanks👍
Weight is dependant on size of RC. Your Mohave is not a light vehicle. Principles are all the same.
Is it better to first tune suspension and then diffs or vice versa?
Good info
I am glad i found this channel!All of your videos are informative and helps beginner like me.Thank you!
Thanks for commenting Christopher. I'm glad these videos help.
I'm so subscribing for this useful information!
Hey dynasty4851, thank you for the comment and sub!
Same here😎 this man's explanations are clear as 🔵sky
Hey just P.X, thanks a ton for the kind words. You guys don't know how much they mean to me!
Thank you @RCexplained for all the advice you give and the phenomenal content you produce. Your content has been a tremendous help and in my personal opinion you produce the best content on RUclips when it comes to Radio Control...BAR NONE! So thank you for your expertise and for all that you do!
I appreciate that!
He's an RC wizard!
Very informative, so I subscribe to your channel now. Thanks.
Thanks for the sub!
very informative video thanks. WHAT kind of oil should I use in my new ARRMA Typhon 6S v5? 1/8 scale. THANKS
Nicely put. I have a armor felony with a different rear differential which one will give me the more top speed 14/45 rear diff .15/42 front gear
Thank you for taking the time to explain this. I appreciate you man. Subscribed
I use wheel bearing grease in center 50 or 60 k in front 500k in rear exb kraton actually thinking about doing grease in rear as well
Extremely well delivered video, your competence is awesome, I just purchased the New Arrma Kraton EXB with the Castle 1717 8S 1650KV setup, with a Futaba HPS-CB700 servo and I’ll use a 17th pinion. What Front/Center/Rear Diff oil weights would you start with as well as the shocks front and rear also. I’ll run it as an 8S so it may be a bit heavier than expected. BTW I’m not s huge basher or jumper I just like having the capabilities if I so chose.
Hey Cleveland Coleman, I'm not sure what the stock weights used in the new Kraton are. Typically I prefer to have the front and center differential heavier than stock. What I would do in your case is run the Kraton with the stock fluids to see how it performs and adjust from there.
As for the suspension setup, here too I prefer to have a higher weight oil in the struts with stiffer spring rates. My setups are usually heavier than stock requiring stiffer springs with heavier oil. For jumping, heavier weighted oil and spring rates will help absorb the large jumps otherwise it will be easy to bottom the Kraton out on these larger jumps.
What weight would you recommend for the traxxas maxx front and rear diff mainly off-road driving
I have a kaiju, what would you recommend diff should I use in my front and rear diffs ? Need help please.
I'm going to be snooping around here ah'bit!!!
I have a 2wd Traxxas Slash with a velineon vxl that is a street car. Im planning to swap out the entire transmission and im putting a hot racing sealed diff. What fluid size do you recomend?
Thanks . Not sure what to do with all the options
have a traxxas hoss 4x4vxl. what would happen if I put 1mil fluid in the center diff and left the front and rear stock?
superb detailed description. learnt a lot. my 1 question about silicon diff oil is this: can I thoroughly mix 10ml of 10k and 10ml of 20k to get 20ml of 15k ? would save a lot of money as you would just need the lowest and highest and then mix everything inbetween...? budget bashing saves lives
I'd expect that to work.
What weight oil would you recommend for a infraction in drag racing
Hello, what weight oils would you recommend for a maverick quantum r on road truck 1/8 scale? I don’t want it to drift, I want it to hook up like a touring car. Thanks
I have a question. If you can help. You mentioned diff oils f5 c7 r3.
Now the question I have is how come 1/8th oils are thinner than 1/10th.
Would the following oils f5 c7 r3 work well in 1/10th
A video about ball diff vs gear diff might be also interesting! There are many threads about what is the effective/dynamic difference about those, and nobody seems to agree on the why, but tends to agree that ball diff is better at low grip conditions than a gear diff (even with low viscosity silicone oil). Maybe it's the left-right power transfer that it might be inherently faster in a ball diff? or maybe the gear diff oil changes propierties the faster the gears rotate, compared to the ball friction? I don't know why.
I think it would be a challenging video to make. I don't really see any advantage a ball diff has over a gear diff. Maybe it being lighter? There's a reason these are fading away and not really used in anything other then small RC's.
@@RCexplained One small advantage is the lack of gear backlash. Since it's just plates pressing on balls there's no play like a gear diff can have. A bigger advantage in my opinion is that when a gear diff starts to unload is becomes easier for it to continue to unload. A ball diff unloads at more or less linear rate. Last advantage I can think of is that ball diffs won't fade or change during a race unless you set it too loose and it slips.
Nice video what about when just ripping around a field and stuff thanks
My recommendation based on my personal driving style for 1/8 or 1/10 scale RC cars is to use:
7-10k weight in the front differential.
10-15k weight in the center differential
5k weight in the rear differential
Awesome info thanks! I’m not into racing, just have an old truggy that I rip around in the woods, would you say 5000 weight diff oil will be good for front and rear? I don’t have a central diff. I’m not trying to stick it to the ground for ultimate traction, rather like swinging the tail out and drifting round trees in the dirt. Thanks for any info!
Hey Eiren, thanks for the comment. 5000 weight in a 1/10 scale truggy can get the rear end loose. However, if looking to be able to swing the rear end out on demand, you may want to go heavier in the rear then in the front. Going with 8000 and up will help you get there. It's just a matter of a trade off between stability and reducing the one wheel peel action.
RCexplained sure I’ll try 8000 first, thanks.
Liked and sub’d. All questions answered.
Thanks for the comment and sub!
PropWash which brand do you use? Where do you buy it?
@@cm6gaming259 I bought Ofna differential fluid a very long time ago and still have quite a bit left. Bought it from tower hobbies but I don't expect them to still have it. Definitely not the best brand for fluid.
Awesome vid, thanks.
Glad you liked it!
Great video thank you! You recommend around 5,000 weight front, 7,000 weight mid and 3,000 weight rear as a base. I’m trying to buy some oil but it’s only in CST, can you convert this for me? I see some people saying 5,000 weight is 50,000 CST etc is that correct? So I’ll need a 50,000 CST front, 70,000 CST mid and 30,000 CST rear to match your weight recommendation?
Thanks in advance 👍🏻
There's no perfect conversion. Stick with a multiplier of about 10. It varies significantly from brand to brand. EDIT: I have updated description to reflect cSt recommendations. I may have said "weight" but meant cSt.
I Have A Arrma Kraton V5, I Want It To Keep It From Not Doing Wheelies.. I Hate When I'm Trying Do Speed Runs Or A Drag Race, It Wheelie, Even When I'm Slowly Moving The Throttle...🙁 What Is Your Suggestion?
Hi I need some advice. I rebuilt the center diff in my Losi Tenaciy MT and used Lucas Xtreme Heavy Duty grease (green) to fill it and now almost all of the power is going to the front wheels.
What is the issue? Is it too thick or too thin? What should I use instead?
Hi RocknRidin, Heavy Duty Grease is still way too thin. Use a minimum of 15-20 K weight fluid in the center differential. If you are looking for even more power sent to the rear end, experiment with 30K or higher.
Great video now I understand better how diff oil works, quick question I just bought an Axial Yeti love this rig. The manual says to put 20 000cst, does this sound right to you? Thanks !!
Yes it does, it all comes down to the desired stock performance Axial is after. If you don't like it, it's easy to change.
@@RCexplained Perfect thank you for your input, much appreciated!
I've never really gotten in to tuning my diffs and have always been the type to adjust to my RC rather than trying to adjust my RC to me. I've blown a few front tires and have realized that I need to put thicker differential fluid in the center.
I have a few questions about differential fluid / grease. What is the difference between diff fluid / grease? I'm assuming that diff fluid actually goes inside of the diff, and grease goes in side of the diff box.
Is diff fluid and diff oil the same thing and are two words that get used interchangeably?
Also, you mentioned that 7k-8k is a good setup for starters on the center, but yet I've heard of people crazy numbers like 1,000,000 in the center. Why is there such a huge gap with those numbers? I can only assume that there is no universal rating system, where a number directly correlates to the thickness.
Not every RC manufacture makes their own diff fluid, which means you could be running a Redcat RC with Team Associated, an Arrma with Losi fluid and so on. So with that being said, are differential fluids the same across all brands (similarly to car oil) in terms of the number to viscosity ratings? Or would 8k from one brand be thicker / thinner than another brand?
This guy is referring to small 1/10 scale buggies on a race track. I use 50k front, 20k rear, 200k middle however my RC is 1/8 Kraton EXB and has a HUGE 6th scale esc/motor combo turning HUGE monster truck tires. With the thicker middle fluid it allows me to wheelie easy.
The brand of silicone diff fluid is of no worry if it is labeled as 10k it is 10k just like auto oil rating.
Cheers~
This video was very well explained
I’m new to Rc
Can u tell me what diff oil I should use in arrma typhon 3s which only has front and rear diff it’s a buggy but I use it on tarmac more and speed
Thank u
Thank you for your comment Chris. Start with 50,000wt in the front and 5,000-10,000wt in the rear. Depending on your driving style and preference you can tune it from here.
RCexplained thank you for your time and knowledge, I will try this method , and will let you know out come so u have an idea the out come with this Rc too , thanks again .
@@CmwSpeedrunUk did u try this yet ow is it goin
just P. X I tried 50.000 wt - 10,000the handling was so so good I could stay on the power more in corners , it felt great .
I like doing speed rounds tho and I lost 4 mph
Which was a bummer,
It made the typhon less noise to
I have lots of video of typhon see what you think bud
hi there, what set up would u recommend on the arrma kraton 8s? and traxxas maxx 4s? thank you very much
I've found that the stock settings perform quite well. More specifically to my driving style I usually go a bit heavier oil in the front and center diffs.
I race my 6s kraton v5 on a dirt r.c. track and run 30k 200k 30k. W good servo horizon hobby 760mg. Balanced well, flows into corners and pulls out evenly with even torque, really great centered in the air. floats like a butterfly stings like a bee.😂
So lighter fluid equals easier to drive and not as hard on your motor to a point, heavier equals a lot of acceleration but less control and less sharp turning, heavier in front , I have a truggy with no center diff or slipper clutch , do I just re open my diffs they were nearly locked and miserable
I have a 1/12 scale truck and it isn’t the fastest but I mainly use it in moderate off-roady terrain. It only has front and rear diffs and I’m planning to put 15k in the fronts and 7k in the back. I wanted to know if that seemed logical for what I want to do with my truck.
That can work well. It depends on the performance that you are after. Try it out and adjust from there.
You should really try first with factory setup, because oil weight can really change A LOT between cars. Like in a E Revo 2 its about 30k and 20M in the center so with 8k in the center the front tires are going to explode lol. Anyway good video for begginners it's always useful
@RCexplained this is a good video. I own an Infraction v1 and the new Felony. I have the Infraction dialed correctly where its a 60/100/30 f/c/r and all I do is drift no speed runs and on that one, the front pulls me out the drift in the direction I want to go...it's wonderful. The Felony...I am struggling to get this the same it has the larger tires on the rear and a different diff ratio so front and rear spin differently and more mass in the rear. The felony will swing the rear end around in turn and drift so it over spins. I tried a 60/100/30 on the Felony that was worse...and for me, I never drive it at OEM 10/100/10 setting I changed it right away since Arrma has 1/3 filled diffs. Now I have it at 30/100/60 and that seems to be better for more front pull and control but the rear swings a little still...still not where I want it like the Infraction. Maybe I need to go 20 or 10 in front diff which I may try to get more frontal spin to pull more forward to counteract the rear. Felony is a bit different for newbie any suggestions Sir?
Hello, I would suggest trying a thicker weight oil in the front and a thinner weight oil in the rear. As you continue to increase / decrease the oil weightings in the direction as suggested, you will continue to add more power to both of the front wheels and reduce the power going to both of the rear wheels. This will help pull the vehicle through the drift.
@@RCexplained Thx sorry for my delay....So I will switch it around since I like how the Infraction pulls on the 60/100/30...based on your suggestion I will do 60/100/30 for the Felony. The Felony has larger 107mm tires in the rear that spin slower than the 100mm tires in the front...so sound like you are saying as I increase in the direction I am going the tire sizing and difference in their spinning is a lower priority and having heavier oil upfront for what I want to achieve (the pulling) is best?
Just learn something new here. Thank you!
Your welcome!
I have a XRT that's stupidly over powered lol but that was the goal.. but right now I don't know what diff fluid is in there.. I know it's stock. It has an 800 kv motor with max 5 running 12s.. I want to know ur opinion in going like 500k fluid in front, 20mil in center and 1mil in the rear. I'm looking for more of speed runs not so much of track.
Me personally with the TLR 8X 2.0 I like to run 12.5 10 10 (Front center rear) in 1/8 nitro buggy
So if i understand this correctly, to curb a wheelie monster you need to reduce the weight of the centre diff fluid??
That is correct
What do you think is a good starting point for my 1/8 scale buggy with brushless motor power? Right now I have 5k front, 10k center. 3k rear. It's alright but still shreds the front wheels on accel.
Thinking about going up to 7k front and maybe 15 or 20k center and leave 3k in the rear.
Front sounds good. If you want to get more acceleration 20k in the center will definitely help get you there. What I like doing is experimenting with multiple weights to figure out what works best for me. I also change my weighting as my driving style changes or skills for a specific rc improves.
@@RCexplained i will try 20k center if i can find some. 👍
What happens when you use million weight in the center, front and rear 10k in a typhon v4 6s?
The power distribution front vs rear will be more balanced which means you will be able to get a significant amount of power to the rear wheels. 10k in the front will allow for more stability in the turns but will also allow more power to go to the wheel with less traction. Same idea with the rear however more power going to the wheel with no traction will keep you out of trouble. If it was heavier in the rear, the typhon could be more unstable under heavier acceleration. Diff oil is all about personal preference. I prefer to go light in the rear, heavy in the center and mid weight in the front.
WELL SAID 🤙🤙🤙🤙🤙🤙
Thank you
What if you r drag racing do you want all diffs the same ?
It depends on your setup and how much power deliver you can get from the rear wheels to the ground. It takes a bunch of testing to get to the setup you are comfortable with.
I typical like to lock the diffs and use throttle management to accelerate in a controlled manner. However, locking the front and center diff while using a lighter weight oil in the rear diff can increase acceleration stability at a potential cost of acceleration. For even further stability under aggressive acceleration at a further cost of acceleration, lighten the fluid in the center diff.
Guy suggesting using 3k wt in the back, while im putting 300k in my shopping cart. Yep, professional
What is the optimal differential fluid thickness for a rear wheel drive drift car
This is covered in the video. Video is not specific to RWD or 4WD.
Do u have1 of these for a slipper or transmission as in the savage flux xl 🤔, need help to understand why spider gears break, so it doe not happen again😔🤔😔 THANKS
Hey just P. X, I do not have a video for slippers or the transmission. I plan to do a video on how RC transmissions can fail. Would this help? The video queue is quite large right now though.
@@RCexplained yes RCexplained, that would definitely be beneficial to not just myself but many others especially as the hpi savage flux xl🔩 is available once again😎
Would I be better off using 500k in my Jato for better posi traction then? Currently have 5000
Yes you can, the only concern I'd have is cornering may become unstable at speed.
I went with 7,5,3 and run a tlr typhon with it being heavier i found i cant make the triple. so Im going to try 7,10, 5