Do 4th gen 1500 4x4s have "active LSD" - or not?

[Jebb]

That is exactly how it works.

The issue being...people feel the spin and lift off the throttle.

Or they think they have to floor it to get out of the slippy.

Ease in to the throttle and stay steady...it slips, one to 2 revolutions and automagically the power is distributed and away you go.

IMO, that's actually better than the mechanical LSD I used to have for driving on the street in snow and ice. Most mechanical LSDs have some amount of pre-bias that applies torque to both wheels when lightly loaded. When you get on a super slippery surface, like ice, that pre-bias can be enough to cause both wheels per axle to spin/break loose - at which point you lose lateral stability. One minute your going straight, the next your backend slides out. Had some pretty harrowing corners on ice when I had my Eaton Truetrak diff! IMO, for street driving on snow and ice, it's better to have one wheel slipping a bit while the other is still guiding you straight. This "BLDS" system seems to do that pretty well.

Of course on other surfaces like mud and sand it's better to have solid power to both wheels of the axle. IMO, "E-lockers" offer the best of both worlds. Would be my LSD of choice if I had the $$$ to spend on it. I believe that's a factory option on the 2500s.

 

[392DevilDog]

Not sure what your last paragraph says.

The 2019 and newer RAm 1500 5th gen has a rear eLocker available, standard on Rebel.

The 2500 trucks, PowerWagon has it standard front and rear...and now the new REBEL HD has the rear eLocker.

I think that is what you were mentioning?

I wish my truck had the eLocker.

But so far the anti spin and BLDS have kept me moving through all the forests of PA and even some harder trails on private land.

 

[DA Smith]

My 5th gen 1500 has the eLocker differential and it's great.

 

[metalchewy]

My 4th Gen, 2010 TRX4 4.7 with LSD will spin all 4 tires in 4x4 High or 4x4 Low. Dirt, Mud, snow, pavement, whatever. After the rears start spinning both fronts kick in.

It does not have 4x4 Auto on the dial.

 

[TomB 1269]

A lot of people up their trucks in 4low when stuck in snow..."Better throttle and wheel speed control". However, it you read closely this also disengages just about everything including the BLDS........

 

[392DevilDog]

A lot of people up their trucks in 4low when stuck in snow..."Better throttle and wheel speed control". However, it you read closely this also disengages just about everything including the BLDS........

You sure!?!?!...I use 4wd low all the time. It works great in Pennsylvania State forest drivable trails...for, you know, tread lightly.

”Brake Lock Differentials (BLDs), which are incorporated into the Electronic Stability Program (ESP) algorithm. BLDs apply braking force to an axle's spinning wheel in order to provide an equal amount of torque to each wheel and deliver greater traction for rock-crawling over severe off-road terrain. A separate set of BLD calibrations is designed for off-road operation and automatically activates when driving in 4 Low”

 

[turkeybird56]

Anti spin differential is an option. Would affect the rear only.

The 5th Gen 1500 also has an available eLocker

Even the anti spin rear can cause only one wheel to spin in the rear axle. Once again...it has to slip in order to engage...and you need to control the throttle enough to get it to engage and stay engaged.

Even with all the nannies on newer vehicles...driver skill is still needed to completely enjoy the vehicle.

YUP, slow and steady wins the day.

 

[msully725]

TFL Truck just made a video showing the brake locking in action. Shows the importance of giving it steady throttle as it takes a moment for the computer to really clamp down on the slipping wheels.

Can a Basic Ram 1500 4WD Work Truck Survive the TFL Slip Test and the Tumbleweed Off-Road Course?

( https://www.allTFL.com ) Check out our new spot to find ALL our TFLstudios content, from news to videos and our podcasts! Can a Basic Ram 1500 4WD Work Tru...

youtu.be

 

[400 psi]

Thats a useful video. Thanks for posting it.

 

[392DevilDog]

TFL Truck just made a video showing the brake locking in action. Shows the importance of giving it steady throttle as it takes a moment for the computer to really clamp down on the slipping wheels.

Can a Basic Ram 1500 4WD Work Truck Survive the TFL Slip Test and the Tumbleweed Off-Road Course?

( https://www.allTFL.com ) Check out our new spot to find ALL our TFLstudios content, from news to videos and our podcasts! Can a Basic Ram 1500 4WD Work Tru...

youtu.be

See, I do know what I am rambling about