TRD Sport 4x4 Rear Diff Lock?

When you want to drive the dam thing. If I am out on dirt roads, or playing in the snow, I shut it off. I personally hate it, my driving style and it don't agree.

 

My typical off road trip is to the beach, and when I’m on very loose sand I push the button once. Haven’t yet tried driving it on sand and holding the button down, but with the single press the truck has preformed great. Not once gotten stuck in my TRD Sport. I plan on getting an ARB air locker in the future with a regear but probably not until I get this truck stuck (hopefully it doesn’t ever). Mud I try and stay away from for several reasons unless I absolutely have to get through it but I’ve done some rock crawling at an OHV Park and the truck in that environment also does great. Driving skill and picking the right lines get you further than equipment every time.

 

The Sport is a beast on the sand. Just did a week in OBX and I was allover the place. I have had few Suburbans, Explorer, Jeep Grand Wagoner, Chevy Trucks. I swear this is the best one I have ever had on the beach, could careless about rock crawling, mudding or trashing my truck. The Sport I'm sure can do and handle more than I can throw at it.

 

When you push the button once it lessens the effect of the TC and leaves on the auto lsd which allows some spin then the nannies kick in, especially trying to throttle out. Only really does anything at low speeds. Starting in snow, wet conditions. When you push and hold it, it turns off the auto lsd and allows for actual wheelspin. Drift,donuts,etc. the lsd doesn’t really do to much. Still feels like a completely open diff, instead of a clutch pack which engages with wheel spin and the auto lsd uses brake force. You lose momentum with nanny-trac

 

Yes it does

 

Traction control uses brakes.

 

The front is never locked. It scrubs while turning because both tires have traction. If you lifted one front without Auto LSD, the free tire would spin and the tire in the ground would do nothing. With the Auto LSD, brakes are applied to the free spinning tire to force some spin to the tire with traction. Auto LSD works pretty well, but not as well as a high bias mechanical LSD and obviously not nearly as effective as a full locker.

This is a fairly good explanation of an open diff

https://www.youtube.com/watch?v=WzMiGtUw0cs

 

Some have both, some have neither. The new Ram 1500 has a clutch pack LSD and the 2500 has torsen gear style. They both probably also have brake assisted LSD. The standard Wrangler uses brake assisted LSD, the Willys has a rear clutch pack LSD and brake assisted LSD, the Rubicon has brake assisted LSD and lockers front and rear. The Chevy Colorado Z71 and Silverado Z71 have a G80 rear limited locker. It is kind a high bias clutch "locker" that is mechanical. So, there are quite a few variations. Clutch pack LSD like the Ford Trac Lock and GM Positraction have been around forever and you have probably head those names. Personally, I like the Eaton TrueTrac or similar torsen gear driven LSDs as there is no clutch pack to burn out and need replacing and you do not need to add a friction modifier to the gear oil to operate properly. They also have almost no feel to them in normal driving. Using both mechanical and brake assisted LSDs can assist in power transfer better than either on their own, especially if one tire is lifted and has zero traction. If I had to choose only one LSD option, mechanical torsen style all day long. I have Eaton TrueTrac front and rear in my Bronco and it is fantastic except the rare time where I have 2 opposite corners with little or no traction, then lockers would really help.

 

When they wanna lay some rubber my nigga

 

What a dumpster fire if Misinformation.

 

I hate rude behavior in a man. I wont tolerate it.

 

?

 

Tacomas come with open diffs from the factory, and use the brakes (ABS/traction control system) to emulate the functions of a mechanical LSD/locker. When a wheel starts spinning, it brakes the spinning wheel(s) in order to send more power to the wheels that have traction.

In "normal" mode (no dash lights), Vehicle Stability Control(VSC) and Traction Control(TRAC) are on. If the truck senses wheelspin, it'll brake the spinning wheel as well as cut back engine power until the spinning stops

Pressing the traction control button once will turn TRAC off. This is what lights the "AUTO LSD" dash light when in 2WD, and TRAC OFF light when in 4HI. It removes the engine power regulation(no longer cuts engine power, allowing you to keep momentum and power out of a rut, etc) and makes the "LSD" function a bit more aggressive/stronger. Still not quite as effective as a real LSD/locker but certainly helps a lot when used properly. VSC stays on so when the truck senses skidding/fishtailing/other unstable condition, the nannies kick in to bring 'er back in line.

Unfortunately the LSD functions are disabled in 4LO from factory, but there are easy wiring mods to enable them.

Holding down the button turns both TRAC and VSC off. No traction assistance, no stability control. Completely open diffs. VSC kicks back in automatically over 30mph though, or when it senses anything particularly dangerous afaik. No way to fully disable it.

The OffRoad models come with A-TRAC. This works in the same way as Auto-LSD except it uses much more robust components, and is a LOT more aggressive. Emulates locking diffs more than LSDs.

OffRoad models also come with an actual, mechanical rear diff locker that physically locks the rear wheels together, eliminating wheelspin from side to side. That's limited to 4LO and under a certain speed though.

 

Manual Transmission Off Road and Pro get A-TRAC while Automatics get Crawl Control.

 

From what I understand …4x4 drive, only one tire in the front and one in the back, is giving the power, once one tire is in the air , all that power shifts to the spinning wheel….a LSD in the rear …when turn on, will lock the spinning wheel to give you more traction, if the other wheel start spinning this wheel gets the lock up, to provide traction…and this can go back and fort….
A true locker will lock both wheels…(spinning the same time..) the ultimate traction…

No LSD/lockers-refers to open diffs…. Note ..next best to open diffs? Is LSD of some kind, most are mounted in the rear diffs, but I heard some guys prefer the front with LSD only,next best is front and rear LSD…
Next best is one rear lockers…and it will out perform any truck with two LSD…one in the front and one in the rear.. the ultimate is two lockers for the best tractions?.and you will want them to dis-engage…and be use when needed.. ARB’s is the most ultimate system for this reason…
I think the Colorado and it’s Canyon can be order with two lockers…?

Using Lockers takes some learning …hopefully both can be dis-engage till needed…

I have seen two wheel drive Vans …with one rear locker..pulling a boat out of a boat ramp..out perform 4x4 trucks with open diffs,
Lol
You should always buy a 4x4 with either a locker or a least a LSD…. Once you really understand how it works..you will be glad you did..

If you have open diffs and rear wheels spinning? Apply some brakes to slow the spinning wheel, and to give traction to both wheels like a locker does…traction to both wheels..

That is one reason why experience people go with at least a limited slip system…TRD off road system …is better in my opinion because of Crawl controls…. And a locker…
A buddy with a good winch…is also a good system to have around….( instead of just you know you are struck…your buddy will be there to agree with you…?). A Rock and a hard place…interesting meaning
Aloha,

 

Just to be clear
L - Limited
S - Slip
D - Differential

This is a devise the using a clutch typically to allow torque transfer from the spinning wheel to the loaded wheel. These are not locking and can be over come easily. In 4 wheel situations they will still act like an open differential. I had an LSD out of an FX4 Ranger in my Explorer, it still spun the unloaded wheel.

The Tacoma uses the ABS to pulse the brake of the spinning wheel through ABS wheel speed detection. This is not an LSD. Just an amped up traction control system.

 

Woodrow Call. Lonesome Dove reference.

 

There are many types / brands of limited slip units..each company have there own names…most use cutches…I believe there was one brand that was gear driven…(tru-track)?
My 1999 ford ranger, and my fellow co- worker rebuilt my rear end( new gears, and install new cutch packs…
Theory is when the wheel that is spinning the most …the LSD , the cutches, will lock , stop the wheel from spinning, and transfer power to the wheel that is planted….once you get moving the cutches then unlocks…this goes back and forth, …but does NOT lock both wheels…like a locker …
LSD’s are constantly locking and unlocking all the time, and not always engaging due to how cutches work..
Does not lock both wheels up…only when one tire starts to spin so many times then the cutches engage and dis-engage…reason for your spinning tire, and cutches do wear out too..

lockers once engage will turn both wheels the same time and at the same speed…that is why on turns , lockers are bad…on turns the outside tire wants to turn more, but cannot..

LSD…do not have this problem…LSD only works on that spinning tire..often the struck tire will move as it gets the power, but it too can slip, hence the back and forth…as yours does…

one locker works better than two limited LSD, because a locker , will lock and keep both wheels spinning the same time!
LSD..cannot do this…and has it limits, still better then open diffs

I am NOT a expert..just sharing what little I know, My fellow Co- worker…he was retire…came from California…to relax , but couldn’t stay home…. Had his own business.. re-building axles, front and rear, installing gears, lockers, LSD,s …sold the business and move to Hawaii…he got restless again and move back to California…. He share so many stories…with us..his knowledge…of gears, lockers ,how every thing works..
Aloha,

 

We use to talk about ..the best place to install a locker? He mention he prefers the front axles…because both tires will lock and pull you …lockers in the rear will need to work harder, because it is pushing from behind….

just that on turns, lockers in the front will need to be unlock……note lockers on the rear, even on turns will force the truck to go straight, because both tires are turning the same time and speed…pushing you straight…

on highways..if you have full time locker on the rear, when turning the truck often times will not feel like turning.you will .need to put in neutral or press the cutch,if standard…to make the turns…

years ago, no such thing as air lockers or electronic lockers…. The most famous was the Detroit lockers…often consider bulletproof…and a must for the serious off roaders…
Those who were really serious..will weld the rear gears..and many race cars did this ..for the ultimate traction..
lockers turn both wheels the same time and speed…very difficult on turns.

Tacoma lockers will work only in low range, best to stay under 5 miles hour, and once free they recommend this to unlock..
I was disappointed of how limited the Tacoma lockers were…. When driving in Sand , loose rocks mud , hilly terrains , often times speeding up helps…not slow motions…. Having lockers on makes sense…for those times when you need to use speed …. Toyota Race Development….? What were they thinking?

If they ever compare the Colorado/ Canyon with front and rear lockers….against the Tacoma, the Tacoma will lose every time in those difficult trails…
Never saw this comparison yet…NOT sure why…?

the new Broncs I believe you can get front and rear lockers too…plus 35 inch tires from factory…with the right gearing…
I like my Tacoma, it meets my needs…. Wish Toyota Tacoma builders wanted to be the best in off road trucks…and more creative to Tacoma owners who modified their trucks…

 

Why hasn’t a mod locked this horrid thread yet, or do we need someone new to come in once a year with their expert opinion.