Eaton Detroit Truetrac Limited-Slip Differential
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- čas přidán 7. 09. 2024
- The Detroit Truetrac is a helical-gear style performance limited slip differential that maximizes wheel traction and enhances driving and handling characteristics. The Eaton Detroit Truetrac Differential operates as an open diff when in normal driving, but will transfer torque when it detects wheel spin.
www.summitraci...
After watching this video, I actually know LESS about the TrueTrac than before I watched it.
They fucking revoked your knowledge. Thats insane.
That's why it's called dope.
Don't think too hard - it's just a variation of a torsen drive that's a little more robust. Eaton recommends you stay away from any slip additives, which unfortunatley come with most gl5 oils these days, and I've caught mechanics mindlessly adding it on vehicles without verifying what type of differential is in service. This reduces bias and needs to be avoided. The question of traditional vs. synthetic is mostly driven by the seals you use - stick with what they are spec'd for. Valvoline, Torco, and Driven all offer oils that work well. The business of using a gl4 varies, and comes down to whether there are any yellow metals involved [brass or bronze], which should not be present in a rear diff - that's gearbox stuff. Think of a truetrac as a low maintenance posi. If you want to install this diff and keep C clip style axles, you will want to have a good pair of clip pliers like KNX-44-31-J32 or equivalent for getting the retainer assembly in/out to get at the spacer - the cheap tools at your local hardware store are an aggravation. Also worth noting is the total mass of the diff: you will need less oil than an open diff - I recently swapped over [in a 12 bolt housing], and the old 2 1/2 quart rule went out the window, making my max volume 77 ounces. A simple drain/refill without removing cover and fully emptying axle tubes/housing came out to 70 ounces. I arrived at a new number by doing initial fill [using fill point on aftermarket diff cover and it's bottom drain plug for removal] with 84 ounces, rocking the axle tubes, then leveling out/letting it rest for 20 minutes before opening the proper fill plug on the housing and draining out the excess.
Flinch thanks for the info. I’m currently building my Bronco motor, and am re-gearing my stock diffs to 4:56. I’m not gonna do anything other than trailing (and live where it snows pretty good) so I’m leaning towards these Detroit TrueTracs for both front and rear (cost, longevity, flexibility, auto functioning)
For a setup like mine, you think they’re a good fit?
@@WesternReloader
To eliminate all slip but still have differential ability, I'd go lunch box lockers if extreme abusive torque load is not a factor. All the load still goes through the spider pin to the case like an open.
I have these installed in my JK, front and rear. They are amazing. I think it's better than a locker, because it is more flexible.
Hey I'm looking at having the same install done on my JK. So you've been happy with it? Where do you utilize the LSD the most? I'm primarily looking for my traction in the wet-cement snow we get here in the PNW.
I've been curious about how an suv would handle on the streets, daily driving, with one of these in the front (in addition to one in the rear). Some suggest it would make the steering feel a little funny, others suggest you would not feel a thing. What's your experience? Granted it's a wrangler so the suspension and steering kind of feel awful by design but still :D
What gear oil (weight and brand) did you use
I’m also curious of how people like this in front and the back for daily driving and driving in the snow. I have a 22 JLU- High Altitude with Dana 44’s and I want to add these.
Great story behind the trutrac,. It was invented by Vernon Gleason in Cleveland Ohio and was originally marketed as the Dual Drive Differential.
Eaton did not invent this great differential, all they did was buy it.
They work great for a on/ off road vehicle. If you have an unloaded tire ie. off the ground you just tap the brakes and it will transfer power. If you have a newer vehicle, the traction control will do it for you
Iv'e used nothing but these beauties for more than twenty years in three different jeep vehicles. Nothing even comes close to the versatility of the truetrack locker. On pavement it drives like an open diff, off road it steers like an open unit but locks up really well in soupy, sandy, or snowy conditions. Watch the vehicle that walks up sections you're having difficulty with, it probably has truetracks in front and rear :)
Without a doubt the most convoluted, confusing, explanation humanly possible,
I don't care HOW a computer computes, I just know it does
Same for TT.
I really like mine in the Ford 8".
Jan. 2021 Eaton was recommending CONVENTIONAL, non synthetic, 80w90.
Cautioning me to not use synthetic, posi lube, or Lucas because.... Those will reduce the bias. They also told me that they suggest fluid changes of 10,000 miles. I installed a drain plug for easy changes.
Really like the TrueTrac so far. Zero negatives. 👍👍👍
I bought one from Summit for my GM 10 bolt diff on my 83 K10 Chevy. Went in smoothly, LOVE IT LOVE IT LOVE IT!!
Well it's been 3 years how's it doing now.. I've seen a lot of negative reviews of them not lasting more than a year especially if you're running hard.
These are FANTASTIC in front differentials on 4x4's...
We appreciate your feedback. Thanks for watching!
GREAT video
Concise right to the information I needed to know in six minutes
got them installed on my 76 f-150 with 4:11 gears and that true track locks quick on turns or acceleration. 😎
0:38 = It generates a 'Bias' of 3.5 . Basically what that means is that the diff will lock up both axles together until one axle's torque EXCEEDS 3.5 times the other axle's torque. After that 3.5 is exceeded, it will start to act more like an open differential and then you get wheel spin on the wheel that is on the ice or is up in the air (offroading). To fix this, you just step on the brakes a bit to increase the resistance to the spinning of that unloaded axle, and that then sends more torque to the axle that has the traction. Most vehicle's traction control will do that for you already, and this differential makes those traction-control systems much better, and quicker at stopping unwanted wheel spin.
interesting. i have a truetrac in my car, and when i got it, i stopped on the shoulder and put the pass. tire in the gravel, and the dr. tire on dry pavement. hit the gas---the pass. tire didnt turn more than 1 or 2 revolutions and all the power went to the tire on the pavement, and left a black mark as it spun. i got virtually no wheel spin on the tire on gravel. but yes, at that point it turned into an open diff and transferred all the power to the one tire on pavement. works very well IMO. no braking was ever used.
so does it do a good burnout
Thank you much for that info
Zbot
An open would have spun the gravel tire and NOT the hard surface tire.
@@hreindustries yes
Everyone seems to be making fun of the guy in video. I must agree that it was very wordy and technical, but if you learn some of the lingo/terms you can understand that He is basically saying that the system is like having the best of both worlds. A locker when you need it and an open diff when not needed.
sooooo... SHOW US HOW IT WORKS! jeezzz
Those gears look like they were inspired by the gears in a pencil sharpener.
🤦♂️
Or were pencil sharpeners inspired by these gears?
Hell yah, got one going into a 72 Blazer frame off build.
I’ve been staring at that Chevelle almost the entire time.
recently got this for the Hilux and yet to test it. expecting great results.
How do you like them??
I just picked up a Helical LSD for my maxima, good info.
quality of the material that gears are made of is more important the amount of the gear or amount of the surface
wow man we see your super smart. we all need to get to your level
The only question I have is this: If one tire becomes airborne, is the differential going to transfer torque to the grounded wheel, even if the vehicle is stationary? I've seen both "Yes" and "no" answers to this same question.
I have an Auburn cone style LSD in a Cobra that weighs 2300 lbs and near 55/45 weight distribution. The Auburn, which is a more aggressive unit, appeared to be the best choice 20 years ago, however combined with this lightweight short wheelbase car, it causes severe understeer when powering out of a corner. The front end gets even lighter under acceleration further aggravating the problem. The Truetrac is less aggressive, but would it make a meaningful difference in this application?
Nice video, thinking of putting TrueTrac LSD into the rear of our AWD we use on our videos. Will help with that automatic brake differential system + LSD = more capability off road!
Thank you for watching!
Uhhh…. Is this not the same design used in the 5th gen (10-15) Chevrolet Camaro SS’?? GM specs their rear diffs (same unit in this video) to be used with their OEM (AC Delco) 75w-85 gear oil and LS additive.
Most people have had complaints about having tons of rear axle differential noises. Some have actual axle issues, some end up having warranty swap things like the axle seals or simply just do a simple drain and fill for a gear oil replacement (w/ the required limited slip additive). Their procedure after changing the gear oil and adding LS additive, is to do a series (usually 6-8+) of figure 8’s at a slow speed, supposedly to work in the new gear oil and limited slip additive all the way throughout the diff unit.
People have gone from running a bunch of different things, trying both full synthetic and semi-synthetic GL-4+ (GL-4/5 compatible, usually yellow metal safe) and GL-5 gear oils. Most people seem to run the formulas that include LS additive already, which on the bottle/packaging, should typically indicate so.
However, some don’t run LS additive at all, have some minor noises and get away with it. Most even go to lengths of adding EXTRA LS additive, which I’ve heard, can cause excessive slippage, to the point of doing one-wheelers in a straight line (yikes)!
It’s such a picky and wonky LSD!!
hello! Is it advisable to use a truetrack, is it recommended on the front axle? For a wrangler mixed use more than normal road?
I know what an lsd does but I couldn't follow this explanation. Is this video not meant for the Laymen? Something like "this gear does this, and this gear does this when one wheel starts to lose traction, etc. would be much for useful for most of us.
Agreed. Summit racing has a animated no word video showing how it works
Joseph Brogna ty
I watched the animation Joseph Braga mentioned and some videos on how Torsen differentials work; and I have a physics degree. It all made perfect sense to me. :-P
I installed one of these recently and was disappointed by the accompanying instructions, which very nearly caused damage when followed exactly. They specify to use the OEM backlash setting, typically between .006 and .011 for my rear end, which is incorrect. Upon consulting a very reputable gear specialty shop, I learned that the correct setting is zero to .002 for track use and up to .005 for street; anymore backlash will be noisy as all get out and potentially damage the ring & pinion. The most frustrating part of figuring this out was when I found out that the same Eaton Truetrac branded as a Yukon Truetrac comes with correct instructions that explain all of this. What gives, Eaton?
In Ford 8" i installed the TT without removing the drive pinion and reinstalling the same ring gear and backlash.
Theoretically it should run perfectly. But I have a "pull whine". Doesn't make sense.
Love the TT operation.
@@hotrodray6802 what was the backlash measurement?
@@PNWJEEPER01 Drive pinion never removed.
Original was 8, reset to 8. Same gears, same backlash.
He says this phrase in the video "whether it's a mineral or synthetic-based lube." So yes, you can use synthetic in these. Maybe they made the gears rougher, because people have been whining about that in the past, and from what I understand, even Eaton said no to synthetics.
Just received my True-Trac from Summit. The invoice said only conventional gear lube is recommended. I called Eaton and was told "synthetic is too slippery, use Shell Spirex HD conventional gear lube". Now, this video from Summit indicates synthetic lubes are okay. Very confusing.
Larry Fry they are ok but conventional will make it react and "lock up" quicker as there is more friction essentially making it do what it supposed to do
That might explain why mine didn't do the whole torque bias thing in certain snow&ice situations more... All I did was apply a bit of brake and then both wheels *poofed* me going!
Not sure I want to run anything but synthetic, since I live in subarctic. But warmer climates are different
Seems like a torsen posi redesign a little.
Some call it a Torsen.
Some call it a worm gear, it's not, it's helical gears.
It's a separate patented design on its own.
I just want to know if I can use amsoil with it
I keep looking at the Chevelle.
Real question is, will it spin both tires?
Yes it will. I installed the Tru-Track in my 1975 Chevy 4x4 back in 1990 and it worked great.
It sure as hell will!!
Yes, it's great for a street/race vehicles because it doesn't force under steer like a spool or locker would.
Reminds me of the guy who after hand surgery asked the doctor, can I play the piano?
Doc says yes.
Guy says, good I didn't play it before.
I have a 2022 Nissan Frontier 2WD, I was looking to install an Rear LSD on my truck. Does true track make an LSD for my truck?
Is this available for a 21 I JT Mojave (Dana 44 front and rear) 6-speed manual. Also, will this work if one front wheel is off the ground?
Is this what I need for doing violent burnouts and drifting? I already broke my welded diff.
I would recommend the Detroit Locker, it is much stronger than the Truetrac.
All i learned was its shiny and im 5:48 down on my yt diet-
I’m more confused now . Is this a SNL spoof video ?
You are
Could I put one of these on my 1995 dually 1ton gmc g3500 van? If so which one
Lot of 10 dollar words but never explained how it works.
Tom Jones Basically, when the gears are under load, the gears push apart from eachother in the case, creating a massive amount of friction between the gears and the case. The friction makes the gears very hard to turn, therefore stopping the open-differential action.
Available on front wheel drive van? (Nissan NV200)
My F150 has an AWD mode for the transfer case that allows me to have all wheel drive in light snow or heavy rain or just driving through the yard without going full on 4 Hi or 4 Lo. Will this limited slip diff work on my front axle while still being able to use the AWD sometimes?
Yes. The only thing your AWD button does is selectively engage the front axle when needed. My Tahoe has the same thing. This unit replaces your differential, so if you have it installed, if the axle you installed it on is being driven by the transfer case, then your truck will be able to take advantage of the benefits if offers. It acts like a regular open diff until a low traction condition occurs, then it will automatically bias torque to the wheel that has the most traction.
in my Tacoma the front diff disconnects on axle and the transfer case for 2wd. the front diff doesn't spin as is where only one axle is connected spinning the spider gears. do you think the trutrac would act in the same way? noticed he was spinning it by hand pretty easy which kinda answers my question.
Hi 123devinzz1,
Yes! The Detroit Tru-Trac would work very well for you in the front differential!
Thank you. I appreciate the detailed information.
What would you recommend for a 94 f150 with 35 inch tires in the mud, a tru trac or Yukon dura grip LSD ?
TruTrack , clutch type lsd,s wear out. I'm replacing a clutch pack now in my Bronco
Bill Chaput I’ve got a 1980 Bronco, 4 speed manual. Planning on TrueTrac front and back
I love the Trutracs! I think they're the best non selective T.A.D.,S on the market .I preferred them to the clutch style limited slips. I just rebuilt the Broncos 8.8" limited slip with carbon fiber clutch packs. The T.T.s are pretty much maintenance free. I guess it all comes on what your going to be doing with the truck. My jeeps I've always run selectable diffs or Detroit lockers. I've even run a spool. Down the road when my bronco is just about done I'll probably go 35s ,chrome alloy axles, 4:10s and TruTracs. It's not like I'm going to be wheeling like I use to in the Jeeps. This truck is to nice to beat on like that.
Any advise on using the Truetrac on a street car that does some road racing? mines a 2010 camaro SS. Thanks
Thanks for watching! Shoot us a text or private message and we can provide some answers to your questions: help.summitracing.com/app/contactus
Just had this installed to replace the factory clutch type LSD on my 9.75 Ford axle. The main concern looking at the unit is there is very little access for lubricant to reach all of the gears inside the case. Oh and a more accurate name would be Taiwan Truetrac because that's where Eaton makes these not Detroit (sarcasm).
How do you like it so far??
I filled the TT with oil before installing the unit in the housing. Messy, but everything was well lubed initially.
I installed a drain plug on the housing and a magnet on the fill plug and changed oil at 250 miles. Eaton recommends oil change every TEN,000 miles they told me. Easy and cheap enough. $20.
I have a 2006 Ford F250, 6" lift, 37" tires and I am getting 4.56 gears put in with the TrueTrac in the rear. I do a lot of heavy towing (10k-13k lbs). Can I use synthetic 75-140 with this unit or do I have to use 85-90w or something like that?
Eaton recommends a petroleum/mineral based GL-5 80W90 gear oil for all Truetrac differentials. Do not use synthetic gear oil or friction modifiers.
@@SummitRacing How about a petroleum/mineral based GL-5 85W-140 like Lucas High Performance Heavy Duty oil?
Summit.... Your video says syn can be used, yet Eaton says NOT recommended.
So no break applied and I mash the gas it’s only going to be a one wheel peel?
Update: truetrac locks pretty much any time force is applied even if your at a stand still and mash the gas
Hi there, nice video, 1 question, will running 2 different diameter tyres hurt the True Trac, talking maybe 1.3 inch overall diameter, my spare tyre is slightly larger In diameter than the tyre on the car. Reason is having fat and skinniest makes it hard to have a spare that covers front and back wheels . Cheers.
The diff will think your turning all the time and just adjust for that rolling difference.
Shouldn't be a problem.
@@hotrodray6802 Thanks for that, as I am running an Eaton Truetrac and been great so far, 3600lb car, 10.52et @ 130mph. I have measured the difference in tyre radius from spare to on the car, I will drop air pressure to 17lbs on the spare to get both radius the same, that should help minimise the difference in the 2 tyres. Cheers From Australia.
@@marsv7777
Reducing the rolling radius does NOT change the tire circumference/ revolutions per mile.
How could it?
Im sold
dumb question alert: does it work in reverse?
pablo diablo yes
Just so you know, this video is an add. There is no explanation of function.
Scour the internet and you'll not find one decent explanation of just how helical limited slip works...
No shit? You don’t say...
What gear oil do I use with a truetrac?
Video says any 80-90.
Eaton says conventional only. Call them.i did.
I installed this in a 79 T/A ,now I get a slight rattle at low speeds
Maxx Masson What’s the rattle from?
@@WesternReloader as soon as I installed at low speeds there is a constant rattle that goes with the speed of the car ,which slows down as I slow down but its very slight at low speeds ,I been a mechanic for 40 years ,I believe there is a slight imperfection in the small worm gears since the unit said made in China ,I would recommend the Detroit Locker ,which I plan doing next summer
Damn .... China made! That sucks. Wtf .... can't we make anything here anymore.
Taiwan.
There we go, a non-clutchplate LSD! 👍👌🥳
So is an Auburn, but not near as good as TT by any measurement.
Eaton Detroit Truetrac Limited-Slip Differential, can I get one for a 2005 Ford Expedition?
Eaton doesn't like putting their products in Ford Expeditions...they'll usually just recommend taking that model vehicle to the local landfill. (:
It's not a Shitvrolet.
I'm that guy who lives to kick donuts n catch second on every 1-2 shift is this a good match for ME❓❓
Sure! Please drive safely!
The TT not having clutch discs will not slip a little on power shifts so your chirp will be less, because both tires bite equally instantly.
TT just bite and go.
To much taking..... All talk no action.... so how does it work !!!!!!!
A Helical Worm Gear will turn a Helical Sprocket Gear, but a Helical Sprocket Gear can not turn a Helical Worm Gear. Thus, a working "Locking" Differential is born.
With this type of differential, one axle of your diff can not spin freely, it must transfer over to the other side at the same rotational speed.
Strixx
Almost... it does allow SOME speed differential between axles.... hence why it's better than a locker OR an open diff. It allows the differential speeds of an open diff, so it doesn't bind in sharp turns like a locker would.
@True Canadian I know how they work, and have installed 3 Eaton TrueTracs in the past.
I was wrong when I said in my previous statement they rotate at the same rotational speed, but meant to say equal opposite rotational speed in reference to the carrier, But it must transfer over to the other side in the opposite direction. Which allows one side to spin faster than the other. Both both axles are connected to each other. When the pinion spins the ring gear, it transfer power equally to both axles as long as it is spinning faster than the changing axle speeds.
Strixx it's not a worm it's a helical.
What you're missing is the helical ends jam against the sides of the hardened case and push against their "containment tubes" which causes the locking. The gears don't "bind" together, they separate and push the helical into the case sides.
Hi, what would you choose? Helical LSD or E-locker for off road ? Thanks
E locker is superior off road traction. But you can't turn worth a darn unless you unlock it
This guy seriously sucks at explaining anything. Fired.
Sometimes, one person's inability to understand looks like like another person's inability to explain.
I heared that it's made in THILAND.. is it correct?
TAIWAN...
I like "no special driving skills" feature. I run out of talent fast enough as it is!
lots of talking and not much information
How noisy is it under normal driving situations?
Not at all. I have one in my Ford Ranger and it runs as smooth and quiet as an open diff.
Totally invisible in sound and operation.👍👍
I talk my customer into buying American and Lo and behold, there engraved on the carrier are the proud words "Made in TAIWAN" .....well at least it was SPELLED correctly. From now on, I'll go Yukon.
at least Taiwan isn't an enemy like China
Taiwan is a free market democracy and the true keeper of Chinese culture (the communists destroyed the culture on the mainland). Taiwan is under continuous threat from the CCP, so like to support them.
But yet 80% of what you buy,, food, medicine, clothes, car parts, etc are made in foreign countries that are socialist or communist.
Please please don't be a hypocrite, because every little bit hurts 🎶🎵
TALK TALK TALK BUT SAID SHIT.
He thinks listeners know at least a minimal knowledge of terms.
Which some don't.
way to much talking
will it pull my wife out of a ditch?
It won't pull a greasy string out a cat's ass
NK, no, you're going to need a spool and a 12000 lb winch for that job...
Especially if she's not in a vehicle
Somebody enjoys talking
Video could be half as long
This guy needs to speak English