This gear oil is designed to be the best lubricant for … So what’s a drag racer to do? The differential types listed above all have one drawback when considering them for use in our strip burners. A 2.0-way differential will limit slip during both acceleration and deceleration (in gear off throttle, not the vehicle’s brakes). Higher spring rates will provide a stronger locking function, with lower rates allowing more slip. The Truetrac doesn’t use the typical clutch or spring type of mechanicals to provide that near locking state. This is the kind of differential that most race vehicles have, whether straight liners or circle/oval track racers. The most common is the Auburn Gear differential, which has springs between the side gears that provide preload force to the conical surfaces of the differential case. An LSD will still allow for wheel speed differentiation so you can drive normally on paved roads with one installed, making it a popular choice for street-driven trucks. The Detroit Locker will provide maximum traction because both drive wheels receive 100 percent of the torque. So after some confusion on a vehicle I purchased, I find myself with a 2001 super crew F-150. Strictly street use, my friend. Every car has a slip diff but with a few tweaks you can totally transform your cars performance in the wet and other low grip conditions. Mike also has experience in the amateur ranks of many of racing's sanctioning bodies. This unit is best used for off-roading or rock crawling, and while it can be used in high performance applications, it’s not considered a road race or daily driver type of differential because it’s not designed for constant switching on and off. We’ve gone through engine sizes and mods for your strip burner. Because the power is transferred from the wheel that spins to the wheel that grips, you don’t typically spin one tire. applications a limited slip diff is pretty much required. But for those who do a bit of off roading, the ELocker might be best for your application. I’m in the Foot Pound camp just like most old school wrench heads, by the way which is correct not pound feet or is it pound in also, wrong! Vehicle engines are mounted one of two ways in the vehicle: axially, for front wheel drive, and longitudinally for rear drive vehicles, with the front of the engine being at and pointing at the front of the car. In other words, when the differential “senses” that one wheel has lost traction, it will send the torque to the wheel with more traction. The locking and unlocking is done automatically, and if you’re a performance junkie with lots of power, the Detroit Locker is one differential that can handle it. Limited-slip differentials use a cone-shape friction surface on the back of the side gear to provide both preload and torque bias. In most cases a limited-slip differential will operate as seamlessly as a factory open differential. Left: The ELocker internals. To say that one is better than the others is inaccurate, because each of these serve a specific purpose and your choice depends on how you use your vehicle. Instead, a set of helical gears rely on torsion to provide the torque to the wheel with the most traction. We will safeguard your e-mail and only send content you request. These differentials have a more aggressive torque bias than the standard performance Auburn limited slips. Racers don’t. Still a 4x4, but this one has an open diff rear end. For those who got that hand-me-down grocery-getter for your first car, you probably noticed the first time you tried to spin your tires that only one tire spun. Whether you own a sports coupe, saloon, SUV or a racing competition car Cusco will have a Limited Slip Differential for your needs. A limited-slip differential is one that limits the slip between the axleshafts (or wheels) when power is applied to the differential. When power is applied, the shafts ride up the ramps and load the clutches for a positive engagement. This cover is usually secured to the housing with anywhere from 10 to 15 bolts, give or take. Watch an NHRA race with dragsters using those large slicks. Limited Slip Differential. We carry differential parts for high-performance street use, dual street & track fun, or full-on professional race cars. This helps prolong tire life, but it is still a great differential for drag racing where traction is of utmost importance. The differential, in a read drive vehicle, translates the longitudinal rotation (more on that later) of the driveshaft to the axial (later on for this too) rotation that the wheels need to drive the vehicle forwards or back. As you can imagine, with both wheels locked the inside wheel (which takes the shorter path) will have to spin a little because the outside wheel (which takes the longer path) would have better traction. We'll send you the most interesting Street Muscle articles, news, car features, and videos every week. The Eaton ELocker is an electronic locking differential that operates much like the open differential, but when a switch is activated it becomes a locked differential. It is a clutch type unit using floating cross shafts that ride up on ramps in the case. These higher gears help spread the torque range out some and allow you to make use of every bit of torque all the way through the traps. Those 4.10 gears are for the engine that makes most of its power in the upper RPM ranges. An automatic locking differential can unlock and allow the inside wheel to rotate freely, but only when power is limited. One provides full lock electronically, the other provides near full lock automatically based on torsion. Use a Gear Ratio Calculator to Choose the Right Gears, There is no hard and fast rule on determining what gears you’re going to want other than use a gear ratio calculator. Because this is a limited slip differential, it will allow one wheel to slip while the other grips, meaning that when cornering you won’t have full lock on both wheels. With only one wheel transferring the power to the pavement, the wheel that spun got all of the power while the other got absolutely nothing from the differential. The locking differential will provide power to both wheels. Our custom built limited-slip differentials BMW race gears are the best … The differential is also responsible for sending the engine’s torque to the drive wheels. Who Makes the Best Racing Differentials and Axles? A good example of this can be seen when a car equipped with a limited slip does a burn out. The taller the tire is, the more distance it will travel per revolution. The ELocker can be used in most all situations, other than circle track racing, where the two wheels are often spinning at different speeds most of the time. Designed for a greater amount of traction for heavy trucks and the street strip racer who wants max traction, it's still smooth enough for a daily driven street vehicle. Nature: A kind of locking system differential. I have an 89 fullsize blazer with 33 inch tires and 4.11 gears and do mild off-roading. It’s designed for a variety of uses, and its automatic operation will allow the unit to unlock during cornering when there is little to no power applied. Waitaminit there Mike!?!?! This reduction in power can be high in situations in which a driver is attempting to get high performance from the vehicle. This affects the final drive ratio of the rear-end. For the time being I can only afford the rear diff but won't be using 4 wheel drive until I can save up the cash for the front diff. 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. The Detroit Truetrac is going to be an excellent all-around differential that can handle the power you supply with your street car, and still manage to give you great driveability. Because the locking is speed sensitive, when cornering under power with a Detroit Locker you can expect some tire spinning from the inside wheel. Thus, longitudinal rotation is rotation along the lengthwise-front-to-rear- axis of the vehicle. Limited-Slip Differentials Moving to limited slip differentials (LSD – the non-hallucinogenic kind), there is a whole story worth of choices. If you’re a drag racer looking for the best traction for the strip, you might want to consider the Detroit Locker as it will handle just about all the power you throw at it. All rights reserved. This style of differential is designed to transfer power from “the wheel that slips to the wheel that grips,” or … An underpowered car would simply get traction and accelerate. In the standard Alfa Romeo limited slip differential, the limit is set to about 25%, however, by rearranging the disk stack, the slip limits can be almost doubled. Because it relies on torsion, friction modifiers and synthetic gear lube are highly discouraged, as they could prohibit the differentials ability to function properly. If you get tired of one wheel peels or want to drift properly, or improve your lap times Cusco Type RS, Type MZ & Type Hybrid differentials will definitely take care of all that. For street use the normal factory 25% limited slips are appropriate. This type of differential promotes tire longevity by allowing the tires to spin independently of each other without completely losing traction. The other tire didn’t seem to do anything more than to support the opposite side of the car. Right: The Truetrac internals. Top 3 Models: 1.Yukon USA Grade Gear-Adjustment of heat. Torsen and helical differentials work in a fairly similar fashion, using … A Limited Slip Differential addresses this issue with some clever technology which limits the difference in speed there can be between the wheels. Performatek can perform either a standard rebuild or a high performance rebuild. For dual use street/track or serious autocross increasing breakaway torque to about 40% is a good choice. Auburn Pro Series Limited Slip. The Limited Slip Differential. On the other side of that shaft if the pinion gear. May also see the burnout marks swap sides get high performance rebuild since we aren ’ discriminate... Loss of engine torque through internal splines to the wheel that spins to wheels! The shafts ride up the ramps and load the clutches for a great all-around because! Power has exceeded traction, and even off road types of fuel systems... 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