Regular axle or Electronic Locking?
09-10-2017, 05:46 PM
#51
I owned a 2008 2wd 4Runner. It had regular traction control where it would cut power and use brakes if wheel looses traction. It also had something they called auto lsd which you had to press a button. This would cut power but just used brakes to stop the spinning. The auto lsd I used a few times and it work really well in the snow.
That's Active Brake Limited Slip. Toyota makes it confusing by adding the D for differential when in fact, it has nothing to do with the differential.
Traction control, when off, will turn off throttle controlled traction and Brake controlled traction on some vehicles. Active Brake Limited Slip will always be active permanently, and has been on Nissan, Toyota, and Ford trucks for a while now.
Auto LSD or Active Brake Limited Slip, is still the Limited Slip control on the Toyota Tundra.
Last edited by Mike Up; 09-10-2017 at 05:50 PM.
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WillB (09-10-2017)
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WillB (09-10-2017)
09-11-2017, 09:01 AM
#53
Yeah - I wouldn't really call our implementation of traction control that brakes the wheel losing traction an eLSD. See the video below for more details Mercedes eLSD:
In their case, there are many inputs that dictate what level the clutches are engaged to enable traction to both rear wheels.
In our trucks, this is not happening. If you have the e-locker, the switch is engaging the locker in the differential which gives a static 50/50 split. Without the e-locker or if the e-locker is not engaged, the ABS is using the brakes to try to mimic this behavior.
Toyota has had something similar going back to when they put IFS in the Land Cruisers. The problem with any ABS type system is the ABS module itself is not meant for constant use. You may also see brake wear and overheating if abused.
As for the G80, GM uses this RPO code for their clutch based LSD and the mechanical locking diffs found in Chevy and GMC trucks. Most people think of the G80 as the mechanical locking diff that blows up when abused. While the truck G80 does have clutches, most people destroy the flight weight mechanism and its tiny splines before wearing out the clutches.
Great video on the G80 below:
In their case, there are many inputs that dictate what level the clutches are engaged to enable traction to both rear wheels.
In our trucks, this is not happening. If you have the e-locker, the switch is engaging the locker in the differential which gives a static 50/50 split. Without the e-locker or if the e-locker is not engaged, the ABS is using the brakes to try to mimic this behavior.
Toyota has had something similar going back to when they put IFS in the Land Cruisers. The problem with any ABS type system is the ABS module itself is not meant for constant use. You may also see brake wear and overheating if abused.
As for the G80, GM uses this RPO code for their clutch based LSD and the mechanical locking diffs found in Chevy and GMC trucks. Most people think of the G80 as the mechanical locking diff that blows up when abused. While the truck G80 does have clutches, most people destroy the flight weight mechanism and its tiny splines before wearing out the clutches.
Great video on the G80 below:
09-11-2017, 03:20 PM
#54
Semantics versus trade names.
Just like a mechanical LSD - there are many many types, no one brand has a lock on the name.
Just like a mechanical LSD - there are many many types, no one brand has a lock on the name.
09-11-2017, 03:27 PM
#55
You are correct in your impression that our trucks do not carry any limited-slip differentials. They are either open diffs or they are factory-equipped electronic locking diffs.
What Vulnox refers to as "fake" limited slips systems is the result of Ford's excellent traction control software when using the ABS hardware at each rear wheel.
The faux LS is simply anti-lock braking in the form of traction control, but driveshaft torque is distributed to only *one* wheel at a time, unlike a locker where torque is delivered to *both* rear wheels at the same time...
What Vulnox refers to as "fake" limited slips systems is the result of Ford's excellent traction control software when using the ABS hardware at each rear wheel.
The faux LS is simply anti-lock braking in the form of traction control, but driveshaft torque is distributed to only *one* wheel at a time, unlike a locker where torque is delivered to *both* rear wheels at the same time...
And we all need to stop splitting hairs over the terminology. Jeep has gerotor pumps, or in some cases electronically controlled clutches, some brands have overdriven clutched differentials. It's all for the same purpose, just with varying levels of effectiveness. Most torque vectoring is overdriven elements along with clutch packs.... blah blah blah
