A 4x4 with open diffs is little different than a 4x2 with a locker. Posi is a limited slip. But which one (limited-slip or locker) is better for you? The benefits of the limited slip versus the locker is that it’s “on” all the time, and that can even help on the street. The. Home > Products > Carrier by Type > Limited Slip 'Posi' > Toyota > Toyota 8" V6 > Toyota 8", 30 Spline, Eaton Truetrac Limited-Slip Differential (Uses 50mm Bearing) Alternative Views: Helical Limited-Slip Differential . Differential Carrier Components First you have the… Carrier The carrier houses the spider-gears , side gears, and holds the ring gear. This open differential allows the wheels to spin at different speeds to help in cornering, but will allow excessive wheel spin when one wheel loses traction. Limited-slip differentials and locking differentials are both added to axles in an effort to achieve more traction in environments where one wheel can break traction and spin, leaving a vehicle with an open differential doing what's known as a peg-leg dance. Like you have a full spool, mini spool. Thread starter Fachie Motion; Start date Jun 11, 2009; Fachie Motion Member. Yes, a professional can setup a trac-loc to live under spirited use, but if you have any pretention toward wailing on that rear-end on the track, with slicks, etc...you might want to seriously look into Detroit locker. TC. Your information will be collected and used in accordance with our  Privacy Policy. And this is an excellent question. The limited-slip differential is similar to the positraction differential, but allows the wheel with traction to have only a limited amount of greater power than the wheel that is slipping. • Tires won't "chirp" posi /limited slip are the same thing ,ford called it one thing and gm called it something else. But what is the difference? All automobiles on the road contain devices between the wheels called differentials, or gear trains. Generally, we tend to let the vehicle's intended use be the dividing line between a locker and a limited-slip-if it's more of a daily driver it gets a limited-slip. This is beneficial in hard-corner turning. A locker locks both sides all the time (or at the touch of a switch). Jun 11, 2009 #1 I am Still working on getting my car together. Advantages of a Locking Differential Power to the other wheel continues until equal control is returned to both tires. If you’re driving on rough roads which have a lot of wetness on them, it will be easier to make turns on these roads if you have limited slip differentials. Umm...not an expert, but i think this is how each works... A posi will send power to the tire with the most traction, getting you unstuck in a mildly stuck situation. Limited slip differentials operate in a manner opposite an open system. While Posi acts as the defender of wheel slip to earlier starts. This tricks the system into sending too much torque to the slipping wheel. Both are useful with distinctions. Limited slip differentials give you better traction than locked differentials. The problem is that wheel speed (from side to side) differentiates when turning. Equa-loc vs. Trac-loc vs. detroit locker. The speed of each output will be different in order to accommodate the necessary rotation speed. The limited-slip differential is similar to the positraction differential, but allows the wheel with traction to have only a limited amount of greater power than the wheel that is slipping. The purpose of differentials is to allow the wheels of the vehicle to rotate at varying speeds. It's about this time that you're probably asking yourself, "Why wouldn't I completely lock both axles together full time with a spool or something?" On the contrary, the limited-slip can sense the wheel rotation to absorb power facing the low traction. Limited slip differentials work well in nearly all vehicles where traction may be occasionally needed. On top of that, many limited-slip differentials use clutch packs that can eventually wear out. **** That is my understanding of the old school posi. Depending on the manufacturer, there are a lot of different trade names: Posi trac, sure grip or track loc but they all work the same. Basically, when you go to make a turn, the inner drive wheel is going to rotate slower than the outer drive wheel of the gear train. Locking Differential. Differentials are designed to assist tires in turning at different speeds. You'll have to figure out which differential is best for you, basing it on your uses and your vehicular application. the Truetrac. Locker = Axles are locked together and … Coming to the battle of Limited Slip vs Posi, what is the state of being more or less? This is beneficial in hard-corner turning. With carbon disc clutch packs, preloaded by a central spring assembly, the Eaton Posi delivers chatter-free transfer of power to both tires, while maintaining a mild, on-road handling characteristic. Eaton Posi Limited Slip The Eaton Posi is an ideal way to gain traction in trucks that see mild, off-road use or need added traction due to performance enhancements. Price: $ 508.96. • Wears tires out more quickly even what most call a locker arent ,ie gov-lock.really just a clutch type posi.if it has a friction clutch beside a spidergear ,its a posi/limited slip.truetrac also a posi/limited slip.has gears that work together to preload the side gears .but its NOT a locker.detroit locker is a mechanical locker.lockers the (side … When making a turn, one tire has to turn sharper than the other on the same axle to complete the turn. Eaton produces an automatically-locking differential called a Detroit Locker that does an excellent job of enhancing traction, and it fully locks when power is applied-something that gives true all-wheel drive, but it isn't always welcomed by a driver in a turn or in icy road conditions. The differential compensates for the differences in the tire angle during the turn. A locking diff means just that, the wheels are locked together and turn the same even during turns causing a little chirp or slip on the inside tire. Copyright 2020 Leaf Group Ltd. / Leaf Group Media. Front axles don't have limited slip. Likewise, a locker or limited slip can be replaced with a standard open carrier. Limited slip works better in a number of situations, there is a thread around here somewhere. If it's more of a toy, then it gets a locker. Are on the inside of the carrier you have one on each side. • Can make snow/ice driving more difficult. Limited slips and lockers can be interchanged. Locker vs Spool vs Limited Slip Differential. • Certain limited-slips can sometimes pull side to side in a front axle application, By clicking Sign Up, you agree to the  Terms of Use. It's also stronger, lighter, and has no internal parts to service (and is technically not a differential). It doesn't need as much power to operate and can be driven with more precision. Comment. Posi Trac or Saf T Trac, or Traction Lock, or Trac Loc, or Sur Grip.....all just other names for limited-slip differentials. 4x4 Action compare the differences between having an Air Locker, LSD and Traction Control under various real life situations Engine & trans done. In fact, we prefer something other than an open differential in any truck, SUV, or car that we drive. A limited-slip differential will prevent the tire with less traction from separately spinning. A Locker locks both wheels under hard acceleration and then unlocks them around turns. These differentials will not divert 100% of the power to one wheel though. • Occasional banging/clunking of automatic lockers could give your grandma a heart attack Side Gears. This is a gear-driven limited slip that has been gaining in popularity. I have heard Lockers are noisy and they are. Limited Slip Differential: Pros. Banned. It also allows one wheel to turn at a different speed around turns. Auburn limited slip or Auburn locker? You might think so if you buy into the literature put out by some OE vehicle manufacturers. Product Code: TT913A610. She is a state-licensed, nationally certified Massage Therapist with a Master of Science from Blue Cliff College. Rear end is stock original with 104 k on it I plan on going with a TA rear cover and 30 spline Moser Axles. • Extremely durable • Silent operation (unless servicing is required), Cons of a Limited-Slip Differential A limited-slip differential is one that limits the slip between the axleshafts (or wheels) when power is applied to the differential. This is done by splitting the torque of the engine into two separate outputs. Limited Slip = Posi Traction. Advantages of a Limited-Slip Differential Qty: Description Vehicle Applications Toyota 8" Truetrac Performance Differential. This allows the tire to maintain power through the turn. A clutch-type limited slip is what you’ll find in most American muscle cars from the ’60s and ’70s along with other rear-wheel-drive cars. If you’re an avid autocrosser/road racer, you might want either the limited slip posi to provide the best traction for both straight line and cornering. Positraction is beneficial when road conditions are wet or muddy. This is why a limited-slip or locking differential is much preferred over a spool in a street-legal application. Limited Slips: Gov-Lock Vs. Yukon Dura Grip. They do make an electric locker for the OP's GM car 12 bolt. A spool is a simplistic, one-piece unit that is cheaper than any limited-slip or locker. If there were no differe… Post Cancel. A locker in the rear, whether automatic or selectable, will give you three drive wheels which can get you out of most situations. And the difference of these devices. More than one of them calls out a limited-slip-device as a locker in the rear axle of the vehicle they’re selling. Theres quite a few forms of lockers. • Doesn't fully lock both axles together This is great in environments where it regularly snows or rains. When a vehicle turns, the inside (of the turn) wheels spin more slowly than the outside wheels. Now that we've sucked you in with that title, we'll tell you right now that it's not a matter of which differential is better, it's a matter of which one is better for you! And of course, a spool can be installed in place of all of them. Originally posted by weedburner View Post. Gear-Type Limited Slip Differential. Though these limited-slip diffs generally have better street characteristics than locking differentials, they do not completely lock both axles together, which can leave one wheel spinning and one wheel caught up if the situation is bad enough. June 18, 2011, 12:54 AM. Traction control augments the limited slip rear axle at higher speeds. In a positraction differential, the unit senses which wheel has the greatest traction, when one tire is slipping or stuck, and sends power to that wheel. You can hear the clunk of locking & unlocking around turns. posi- trac are used on drag strips both wheels are turning at the same time that is why you see them do wheelies at the drag races. In the early 1970s, real muscle cars were fading away, and average Americans were becoming more concerned with a plush ride than with high performance. Same exact thing. The helical worm gears keep torque flowing to the wheel with the most traction, should your 4x4 get into a sloppy mudhole. Positraction and limited-slip are both types of automotive differentials. In this video we compare an Open Differential (Ford Ranger) to a Yukon DuraGrip limited slip differential (Chevy Silverado). Both limited-slip and locking differentials solve a problem with the standard open differential found on most passenger cars. Mona Prestenbach is from south Louisiana and started writing professionally in 2010. • Can possibly be weaker (physically) than a locking differential, depending on the design Join Date: Nov 2007; Posts: 11805; Share Tweet #10. With over two decades of extensive office experience she offers excellent communication and organizational skills. • No accelerated tire wear Eaton also produces a helical gear limited-slip differential called the Truetrac. Auburn limited slip or Auburn locker? • Front locker makes steering difficult I was also going with an Eaton until I heard about this Truetrac. The limited slip for the Dana 44 axle pictured here is no exception. posi/limited slip rear (both wheels, more power is sent to wheel with least amount of traction) Locked rear. I would suggest a true locker vs posi or limited slip as they are just that; limited. About this Truetrac '' Truetrac Performance differential a Master of Science from Blue Cliff College straight type! 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