My LR3 has F/R ARB lockers (long story but got lucky and bought a freshly built truck with all the goodies that was kicked out by PO's wife)

so on the trail - which "Mode" works best when locked? I'm trying to figure out if i need to change settings or if the lockers will coexist with the traction control system.... I'm half way thinking i'm just going to leave it in "normal mode" on trail.

trails here are a bit of everything.

fyi i have lockers on my 90 as well - but it doesn't have any fancy electronics - so i'm fully versed in Locker-Fu

thx

 

I haven't driven one that is locked front and rear just a HD package truck. I used the sand mode and rock crawl for most everything.

 

Yeah this is a unique operational scenario. I guess I'd start my experimenting by using each setting as prescribed for the terrain you're in. For a "typical trail" that has a little of everything (ruts, roots, rocks, mud) I'd go with mud/ruts. To me it's the best "all around" setting.

 

The lockers should improve the traction slightly but the drive modes control throttle response, transmission gearing and the suspension suppleness that are calculated for the various scenario's.

 

The drive mode also controls the propensity for locking/un-locking the differentials, which is why the OP's question is relevant. Having ARB lockers which are locked manually is a completely different scenario than one would find in a standard LR3.

Again I'd say experiment. I think there are some guidelines on when to use (and not use) the front locker, for instance if you're in a curve or have a turn ahead you don't want the front locked....I'd think for hill descents it may be nice to have on, not sure though...hill climbs for sure (rear is more important but front can help). ...and then select the TR mode based on the type of terrain you're in.

 

interesting... seems i am a party of one with an SE and Front and Rear ARB's...

Does anyone know if the TC also controls the brakes? i thought it did but could be wrong..

I am asking b/c if it uses individual brake control in addition to torque control to stop wheel spin that could get interesting for the computers and throw a fault.. and if the fault results in a suspension reset (i.e. drops it to stock or below height) that could make it even more interesting.. neither situation is desirable especially when you need the lockers.

Lockers will prevent the truck from applying side to side torque (or releasing it more importantly).. TC brake articulation would be counter productive here.
the stock HD system locks and unlocks the diff on demand (a lot actually, use to have one) but i think it unlocks for TC purposes - anyway it only locks for very short periods of time when you need it - its actually pretty slick as is there is no manual control over it.

all the normal locker stuff, got that... (my 90 has ARB's F/R as well) its the electronics i am interested in for this question.

Thanks

 

TC does utilize the brakes.

The part that will be interesting in my mind is the CDL in this equation. It locks based on wheel spin. The lockers will affect that and I'm curious to see how the computer deals with that.

If you have watched in a HD truck the center diff would always lock than a second or 2 later the rear diff would lock up.

I wish I would have ran into you at URE it would have been interesting to see it work with the ARB lockers. Since I had decided if my diffs went sideways that was the replacement plan.

 

"If you have watched in a HD truck the center diff would always lock than a second or 2 later the rear diff would lock up."

There are plenty of times that my rear diff is locked but my center is not...so I'm not sure about that statement unless you mean that the center always locks first but then after that could unlock while the rear remains locked.

 

In my experience I would see the lock in the center kick over first followed by the rear. It could unlock before the rear once power trasfer and movement is happening

Which makes sense to me, but I have been wrong before.

 

Yeah I'm not sure....I didn't watch it continuously enough to know whether the two were locking and unlocking independently but it sure does seem like it.

Also, the OP posted this above "...but i think it unlocks for TC purposes - anyway it only locks for very short periods of time when you need it - its actually pretty slick as is there is no manual control over it."

Wondering what is considered "short periods of time?" They seem to lock up for as long as needed, in my experience, which in some cases is quite a while, like ~30 seconds. This to me, is the difference between an electronic locker and a limited slip diff....but my understanding of the latter is, well....limited.