Centre Diff locks 100 series.

Submitted: Sunday, Mar 02, 2008 at 14:32
ThreadID: 55113 Views:6706 Replies:7 FollowUps:18
This Thread has been Archived
How do these work??

I understand the diff lock set-up EG : Detroit Lockers etc, but the centre diff locks in a 100 series.

Last January I got stuck drivers side down on the Finke track after taking the trailer off I tried to reverse out in high 4, no go, so I put it in low and pressed the diff ( centre lock) button and out it came easy.

By the way when in high 4 the drivers side tyres moved and the Passengers side stayed put.

Just curious.

Thanks in advance.

Cheers Steve.
Back Expand Un-Read 0 Moderator

Reply By: Member - Doug T (FNQ) - Sunday, Mar 02, 2008 at 14:40

Sunday, Mar 02, 2008 at 14:40
Steve
The center diff is to stop wind up in constant 4x4s, when you lock it the vehicle is then just like mine , a normal 4x4.

.
still going strong with 836,179 K's

Lifetime Member
My Profile  My Blog  Send Message

AnswerID: 290390

Follow Up By: Member - Doug T (FNQ) - Sunday, Mar 02, 2008 at 14:45

Sunday, Mar 02, 2008 at 14:45
I might add there a lot out there that think a 4x4 with a center diff lock is the you beaut go anywhere machine, whick in fact it is once that diff is locked it becmes a 4x4 with 2 open diffs....a 2WD really, 1 in front, 1 at the rear.

.
still going strong with 836,179 K's

Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 555722

Follow Up By: Member - Doug T (FNQ) - Sunday, Mar 02, 2008 at 14:48

Sunday, Mar 02, 2008 at 14:48
Another ADD ON
as you wrote
["By the way when in high 4 the drivers side tyres moved and the Passengers side stayed put"]
Yep, exatcly as I always say.....so much for the fantastic LSDs

.

still going strong with 836,179 K's

Lifetime Member
My Profile  My Blog  Send Message

0
FollowupID: 555725

Reply By: Wayne (NSW) - Sunday, Mar 02, 2008 at 14:52

Sunday, Mar 02, 2008 at 14:52
Steve,

The 100 series is a constant 4WD and has 3 diffs. One on the front axle, one on the back axle and one on the side of the transfer box.

When in H4, the vehicle can be driven on a hard surface with out transmission wind up because of the centre diff. If the vehicle is driven off road in this mode and just one wheel is lifted the vehicle goes no where. All the power will go to the wheel with least resistance.

When the centre diff is lock via either the button is pushed or low range is selected, the vehicle is now in 4WD. This is like when H4 or L4 in the Troopie is selected with the front hubs locked.

With the centre diff locked the power is split 50/ 50 to the front and rear diffs. If one front wheel is lifted off the ground 50% of the power will be lost out the front axle but there will be 50% of the power still going to the rear axle. This will allow the vehicle to drive.

The center diff lock is electrical operated and work well. The vehicle can be on the move when the center diff is locked and should be going in a straight line to do so smoothly. To disengage the vehicle can also be on the move and again it is better to lift the foot of the accelerator and driven a straight line.

Wayne
AnswerID: 290392

Reply By: Member - Axle - Sunday, Mar 02, 2008 at 15:13

Sunday, Mar 02, 2008 at 15:13
Hi Steve, Might as well add my bit, Wayne has explained it very well, The only thing that i've seen happen with toyota and pajero with centre diff locks, is the fact that if you are on a hard surface in steep country with a heavy load on ,or towing a heavy item ,On take off you can suffer severe diff wind up, if low range is selected. The way around it is to wire it up so you can select low range with out it engaging 4wd in other words turn it off.

Landrover defenders are constant drive ,but you engage the centre diff manually.

Confused!!?? So am I...lol :))))).


Cheers Axle.
AnswerID: 290396

Reply By: Patrolman Pat - Sunday, Mar 02, 2008 at 15:53

Sunday, Mar 02, 2008 at 15:53
I might get howled down for this reply, but shouldn't a tour operater be familiar with the various 4WD systems on such a popular vehicle as this .
AnswerID: 290406

Follow Up By: Member - Ian H (NSW) - Sunday, Mar 02, 2008 at 16:08

Sunday, Mar 02, 2008 at 16:08
Just what I was thinking.
0
FollowupID: 555747

Follow Up By: Andrew from Vivid Adventures - Sunday, Mar 02, 2008 at 16:08

Sunday, Mar 02, 2008 at 16:08
his tours are a long way from the Finke...

and I have no idea how the popularity of the vehicle makes any difference - except that he has had a handful of them.

That said, there aren't too many places you can't take a 100 Series with only LSDs in my experence - regardless of whether you know how it works.
0
FollowupID: 555748

Follow Up By: Wayne (NSW) - Sunday, Mar 02, 2008 at 16:17

Sunday, Mar 02, 2008 at 16:17
Patrolman Pat,

Yes and no

Steve, from what I can understand, has a tour company that does in vehicle tours. He takes people in his vehicles. He would know how the vehicles that he owns very well, how they work and how to fix them.

Troopies are different to a 100 Series, which are different to a Prado, which are different to a Rav4. All Toyota all different.

A vehicle that he does not drive on a regular basis would be as foreign to him as it would be to you.

When I was doing driver training on a regular basis, I was amazed at the amount of different ways vehicle manufacturers come up with on how to select 4WD, high and low range. Even in vehicles that look the same from the out side they were different on the inside.

Wayne
0
FollowupID: 555751

Follow Up By: Patrolman Pat - Sunday, Mar 02, 2008 at 16:31

Sunday, Mar 02, 2008 at 16:31
I didn't say he was taking a tour. I would think that any experienced 4WD would familiarise himself with the vehicle he was driving before getting stuck in a semei remote area like the Finke.
I could understand someone with no experience doing that, see it all the time, but not from someone with experience, which i believe Steve has..
0
FollowupID: 555754

Follow Up By: Steve from Top End Explorer Tours - Sunday, Mar 02, 2008 at 16:45

Sunday, Mar 02, 2008 at 16:45
Well Pat and Ian.

It's like this.

I had my thoughts on how this worked, but it was easier to ask the question than to explain what I thought, by the way my thinking was right.

Just so as you no when I go on holidays I take a number of parts and most of my tool collection (extensive) I could break down any where and fix most problems and or fix it to get somewhere I could fix it properly EG snapped Rear diff studs in the Bungles because some other person hit the out side of the axle with a hammer to extract the cone washers, I was able to take the axle out and replace it with the short axle then with a rag and tape cover the other side, take the tail shaft off and drive out with the front wheels, to Kununnurra, all while it was bleep down.

I can rebuild my own gearboxes and diffs I do my own servicing I do my own breaks, I even have a off season job at Mobil Jabiru pulling spanners.

By the way there is no regulation yet that suggests that a tour operator or guide must be a mechanic, in fact 2 operators I know are Accountants.

Cheers Steve.


0
FollowupID: 555759

Reply By: Member - Kiwi Kia - Sunday, Mar 02, 2008 at 16:44

Sunday, Mar 02, 2008 at 16:44
Steve, when you have the centre diff locked try a light foot on the brakes at the same time as you use a little accelerator. This will help engage the lsd in the rear. Alternatively put the handbrake on a few notches - but remember to let it off again as soon as you get moving again. Don't believe anyone who tells you the lsd's don't work, they are just showing their ignorance of the mtc that is occasionally required to keep them in good working order.
AnswerID: 290416

Follow Up By: Steve from Top End Explorer Tours - Sunday, Mar 02, 2008 at 16:58

Sunday, Mar 02, 2008 at 16:58
With what I thought and now confirmed, the only way I could have got out was if the LSD was working, the car at the time had 300000 km on it.

Cheers Steve.
0
FollowupID: 555762

Reply By: Shane (QLD) - Sunday, Mar 02, 2008 at 16:55

Sunday, Mar 02, 2008 at 16:55
Now here's one for all you that have been around the traps. Where is reverse gear on a British Austin Champ 4X4 & if you know that you would also know how many gears it has in each direction(Must be some ex military personel out there). As a past Rec/Mech I found out the hard way & do know ! Any takers !
AnswerID: 290418

Follow Up By: Wayne (NSW) - Sunday, Mar 02, 2008 at 17:05

Sunday, Mar 02, 2008 at 17:05
Shane,

The gearbox had five ratios with synchromesh on all gears. Drive from the gearbox was by shaft to the rear differential which incorporated reverse gear, thereby allowing 5 reverse gears also, and then by a long shaft to the front differential which incorporated a simple dog clutch to enable four wheel drive when required.

Wayne
0
FollowupID: 555763

Follow Up By: Shane (QLD) - Sunday, Mar 02, 2008 at 17:12

Sunday, Mar 02, 2008 at 17:12
Full marks to you Wayne ! But you forget about the Rolls Royce motor !
0
FollowupID: 555767

Follow Up By: Shane (QLD) - Sunday, Mar 02, 2008 at 17:15

Sunday, Mar 02, 2008 at 17:15
Mean't to say (forgot) !
0
FollowupID: 555768

Follow Up By: Wayne (NSW) - Sunday, Mar 02, 2008 at 17:18

Sunday, Mar 02, 2008 at 17:18
Shane,

Google is you best friend.

Austin Champ

I did have help, BTW you only asked about the reverse gear location, if you wanted more I would have copy and past more.

Wayne
0
FollowupID: 555770

Follow Up By: Shane (QLD) - Sunday, Mar 02, 2008 at 17:26

Sunday, Mar 02, 2008 at 17:26
Now come on Wayne that's cheating !
0
FollowupID: 555773

Reply By: TD100 - Sunday, Mar 02, 2008 at 20:33

Sunday, Mar 02, 2008 at 20:33
Steve,

one of the explanations above was pretty accurate(waynes i think)as for wind up i have cured that problem,i have disconnected the auto introduction of the centre diff when selecting low range,so i can use 4L or 4H with no c/diff or at the press of the button its on.there is a switch on the top rear RHS of the transfer case,unplug and seal up this connector and job done-full manual control of centre diff which i have found to be much more user friendly,especially when reversing the caravan in the drive.cheers Paul
AnswerID: 290455

Follow Up By: Featherfoot - Monday, Mar 03, 2008 at 16:58

Monday, Mar 03, 2008 at 16:58
Paul,

I have a 2006 t/d 100 and asked my Toyota dealer if I could do what you have done and he said it wasn't possible. Was wondering if yours is 4 or 5 speed auto.

Regards

Gary
0
FollowupID: 555950

Follow Up By: TD100 - Monday, Mar 03, 2008 at 18:27

Monday, Mar 03, 2008 at 18:27
FF,

mine is a 5 speed auto,its on the transfer case anyway,as for being the same t/fer 4 to 5 speed im not sure but i know mine works.yours i imagine would be the same(mines an 03) there are 2 switches up there its the one further to the right.cheers Paul
0
FollowupID: 555977

Follow Up By: Member - Matt M (ACT) - Monday, Mar 03, 2008 at 18:50

Monday, Mar 03, 2008 at 18:50
Gary,

Have a look in the technical section on the Landcruiser Owners Online website (www.lcool.org). Some good info on there.

Matt.
0
FollowupID: 555990

Follow Up By: Featherfoot - Monday, Mar 03, 2008 at 19:14

Monday, Mar 03, 2008 at 19:14
Thanks for that, will check it out tomorrow
Gary
0
FollowupID: 556000

Follow Up By: Featherfoot - Tuesday, Mar 04, 2008 at 14:06

Tuesday, Mar 04, 2008 at 14:06
Steve,

Tried it on my 2006 model and works a treat.
The Discovery I had before could select low range without locking the centre diff and was great for reversing the boat so am happy the same can be done with this bus as well.

Many thanks

Gary
0
FollowupID: 556145

Sponsored Links

Popular Products (14)