Wavetrac K-Series Limited Slip Differential
Part Number: 60.309.190WK
Inside Continental United States
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Will It Fit Your Vehicle?
Patent pending Wavetrac design automatically improves grip in low traction conditions. This feature is truly innovative and unlike any other torque biasing diff design.
9310 steel gears run in case-hardened billet steel bodies. ARP fasteners used throughout.
As supplied new, the Wavetrac differential will perform a lifetime of service without maintenance or rebuilds.
If desired, you can alter the diff's behavior to suit your needs using optional components.
All Wavetrac differentials include a transferable, Limited Lifetime Warranty.
To best understand how the Wavetrac is truly different from the other gear differentials on the market, you first have to understand the primary problem that the Wavetrac solves.
The problem: Loss of drive during zero or near-zero axle-load conditions.
Zero axle-load is a condition that occurs during normal driving, but creates the most noticeable problems when driving in extreme conditions. Zero or near-zero axle-load is the condition that exists when there is 'no-load' applied through the drivetrain, when one drive wheel is nearly or completely lifted (often in aggressive cornering). It also occurs during the transition from engine driving a vehicle to engine braking and back, even with both drive wheels firmly on the ground.
Here's how that loss of drive hurts you:
1) If you lift a wheel, all gear diffs except Wavetrac, will NOT power the other wheel.
2) During the transition from accel to decel, all gear diffs except Wavetrac, do nothing.
Why does this happen?
All gear LSDs (including Torsen, Truetrac, Quaife, Peloquin, OBX, etc.) work in basically the same manner: they divide the drive torque between the two axles, applying drive to each side, up to the available grip of each tire. The amount of drive torque one wheel can get over the other is described as the bias ratio, a measure of the torque split across the axle.
Standard, open differentials have a bias ratio of 1:1. They can only apply as much drive torque as there is available traction at one wheel. When one wheel loses grip, the total available drive is lost as well (at a 1:1 ratio). All your power goes out the slipping wheel - along the path of least resistance.
Torque biasing differentials offer increased bias ratios over open differentials. For example, if a diff has a bias ratio of 2.5:1, then it can apply drive torque to the wheel with the most traction (gripping wheel) at 2.5 times the traction limit of the wheel with the least traction (slipping wheel). This is a significant improvement over an open diff most of the time. The problem is that when one tire has LITTLE or NO grip (zero axle-load), the other wheel gets ZERO DRIVE, because (basic math here): 2.5 x 0 = 0.
Lift a wheel (or substantially unload a wheel) and you get zero axle-load on that side - that means that during the time the wheel is unloaded, the typical diff will NOT power the wheel that's still on the ground. No matter how high the bias ratio, you get no power to the ground.
During the transition from accel to decel, where you have near zero torque on the axle, even if the wheels are on the ground, the typical diff is unable to begin applying drive torque until AFTER the zero torque condition is over. While this condition is generally short-lived, the fact that most diffs can do nothing during that time means that there will be a delay once the zero torque condition stops - creating a reaction time in the driveline.
4 reviews for Wavetrac K-Series Limited Slip Differential
5 out of 5.0
11/14/2015 by Karl Schoenefeld
I have a steep asphalt driveway. This time of year we have a lot of leaves from our trees. Traction has always been an issue, but with the Wavetrac -- no problem! Looking forward to snow? Well, I wouldn't go that far!
12/12/2013 by Jaime Marron
Amazingly huge difference. Car is a lot more solid turning high speed. Also feel the difference at launch and engine braking. Great quality at an awesome price.
5/29/2011 by Nick Andras
Haven't tried launching it yet cause haven't broken the new clutch in yet but i can tell a HUGE diff in cornering. I take curves going 70 that i used to take going 35. I love it so far!
9/17/2010 by Nate Shapiro
Amazing differential!!!!!!! Very Solid
I had this installed a few weeks ago and was waiting to break it in a bit before giving a review. Here it goes. This thing is awesome. My cornering speed is MUCH faster and I really love how it keeps power to both wheels even if one is under low traction. The warranty is basically the same as the quiafe and the company who makes it is the same too!! Gotta love the technology. LSD is a must!
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