LSD Front and P/T 4WD for a 100?

steenh · 07-30-08, 12:52 PM

Just looking for a 2nd opinion. '98 Cruiser, elocker in back.

I'm planning on some mods and was going to go with ARB front locker. The shop i'm talking to (an LC shop) has made the suggestion to go with LSD in front and a P/T 4x4 mod.

Reasons are...

ARB might put too much strain on axles. And, if they break, getting out is very tough. (I'm not a mechanic)

LSD should reduce the chance of breakage. Lose a bit of ability as well, but I don't rock crawl the 100... just looking to add a some capability and reduce the chance of breaking.

P/T 4x4 system would make getting out after breakage much easier. Also should increase gas mileage on the highway.

This is a trail truck only. Running 35's, or will be soon.

It sounds like a reasonable alternative, saves a few bucks (that's not driving the decision though), but a bit nervous that I've not once heard of anyone doing it.

Thoughts appreciated.

Trunk Monkey · 07-30-08, 01:01 PM

Is there a LSD made for the 100 series front axle? And for adding the part-time case, anything can be done with money. There's no mod I know of to make the 100 series t-case part time or kit available. Only route I'd know of it to swap in a non-US t-case ($$$$$$).

rusty_tlc · 07-30-08, 01:24 PM

35's?
Are you re-gearing the differentials?

As I understand it the backlash in the OEM differential is what causes them to fail. The ARB mitigates that. I would assume a LSD would have the same problem that the OEM diff does.

Can you get more info on the P/T 4WD set up? That would be an interesting mod if it could be done cost effectivly.

steenh · 07-30-08, 01:38 PM

Quote:

Originally Posted by rusty_tlc

35's?
Are you re-gearing the differentials?

As I understand it the backlash in the OEM differential is what causes them to fail. The ARB mitigates that. I would assume a LSD would have the same problem that the OEM diff does.

Can you get more info on the P/T 4WD set up? That would be an interesting mod if it could be done cost effectivly.

Seems like the issue is moving the point of weakness... ARB certainly moves it out to the shafts. Seems like LSD would provide some protection against backlash, but definitely not as much as ARB. But then I've not heard of many axle shafts breaking on hundies either. I'm torn.

As soon as I get the details on the P/T mod I'll pass it on. Talking $650 plus labor. This one I like if it's real.

hks3sgte · 07-30-08, 01:44 PM

Quote:

Originally Posted by rusty_tlc

35's?
Are you re-gearing the differentials?

As I understand it the backlash in the OEM differential is what causes them to fail. The ARB mitigates that. I would assume a LSD would have the same problem that the OEM diff does.

Can you get more info on the P/T 4WD set up? That would be an interesting mod if it could be done cost effectivly.

x2 on everything.

The ARB should be your ONLY option for the front.

The part time setup is a nice idea. I know that the guys in other places use the part time case (HF-1A)

hoser · 07-30-08, 01:46 PM

I have seen these selectable hubs from Japan by MORISSHU which are for the 100. (retail: 89,000 yen which is over $800). No part-time T-case though.

hks3sgte · 07-30-08, 01:52 PM

Quote:

Originally Posted by hoser

I have seen these selectable hubs from Japan by MORISSHU which are for the 100. (retail: 89,000 yen which is over $800). No part-time T-case though.

something about the orange hubs just "looks right" on a Land Cruiser.

steenh · 07-30-08, 02:26 PM

LCruiser 80/100 Series

Here's the link to the P/T adapter... looks like it's for real...

Going to go with ARB, and will most likely regear though I'm not towing and it's not a daily driver.

Thanks for the insights.

rusty_tlc · 07-30-08, 02:36 PM

Quote:

Originally Posted by steenh

Seems like the issue is moving the point of weakness... ARB certainly moves it out to the shafts. Seems like LSD would provide some protection against backlash, but definitely not as much as ARB. But then I've not heard of many axle shafts breaking on hundies either. I'm torn.

As soon as I get the details on the P/T mod I'll pass it on. Talking $650 plus labor. This one I like if it's real.

I've only read of one case of axle failure.

hoser · 07-30-08, 02:55 PM

Question: the Rear Center Differential Housing. What does it do? Disconnect the front driveshaft?

PART NO. MFK1210/100 RRP AU$795 inc GST
The Kit consists of: Rear centre differential housing, thrust bush, free wheel hubs, 4 axle spacers and instructions.

steenh · 07-30-08, 03:11 PM

Quote:

Originally Posted by hoser

Question: the Rear Center Differential Housing. What does it do? Disconnect the front driveshaft?

PART NO. MFK1210/100 RRP AU$795 inc GST
The Kit consists of: Rear centre differential housing, thrust bush, free wheel hubs, 4 axle spacers and instructions.

Was described to me this way.

Center Diff lock button will control connection to the front driveshaft.

Lock hubs in front and press CDL and you are in 4x4, either HI or Lo range.

Unlock hubs, with CDL and driveshaft turns, wheels don't.

Unlock hubs and no CDL and you are 2x4.

What I'm not sure of yet is whether there is a 4x4 option with the CDL unlocked in HI.

Trunk Monkey · 07-30-08, 03:27 PM

I'm skeptical that this is for the US 100 series. Christo has it on his site, 80 only.

Slee - Drivetrain - Drive Shafts

steenh · 07-30-08, 03:33 PM

"ABS 100 Series IFS Models
If your vehicle has IFS (Independent Front Suspension) and is fitted with ABS brakes the kit can be fitted without effecting the ABS system. The reason for this is because the ABS speed sensor is reading off the wheel hub."

Hope you are wrong. This is from that page on Marks site... I'll know in a few days.

hoser · 07-30-08, 03:47 PM

Quote:

Originally Posted by steenh

Unlock hubs and no CDL and you are 2x4.

So perhaps it does disengage the front driveshaft because normally that configuration would yield 0x4, front driveshaft rotating but no wheels turning.

sleeoffroad · 07-31-08, 11:17 AM

We have not added the 100 kit to the site. The hubs were really expensive in the past but they are now more affordable. It works the same as the 80 kit. The center diff is removed and replace with a spool. The center diff lock actuator becomes the 2wd / 4wd selector.

sleeoffroad · 07-31-08, 11:19 AM

I would not do a limited slip in a trail only truck. Stick a ARB in there and leard how to remove the CV axles. PT kit is a personal preferrence. It makes it easy to drive out but only for certain breakage situations. Some you still have to remove parts so you might as well learn how to do it.

Trunk Monkey · 07-31-08, 11:28 AM

So, $750 bones US plus install. I wonder what the fuel savings would be, plus you'd have less wear on the CVs. Very interesting . . . .

How are the AVM hubs Christo? It'd be easy to carry the OEM flange as a spare.

steenh · 07-31-08, 12:00 PM

One last question on the p/t kit. Does it eliminate the possibility of driving in 4x4 HI with the CDL unengaged or is it always locked when you are in 4x4? Seems that's the case unless I'm missing something.

hoser · 07-31-08, 12:03 PM

Thanks, Christo.

Here's a good thread on the part time conversion.

Fuel savings and more power? This might just be what the doctor ordered.

sleeoffroad · 07-31-08, 12:18 PM

You do not have AWD (center open) anymore, you either have 2wd or 4wd (center locked)

Trunk Monkey · 07-31-08, 03:11 PM

Quote:

Originally Posted by sleeoffroad

The center diff is removed and replace with a spool.

That would be one thing that one prevent me from doing it. So, if you lock the center to have 4wd, you no longer have differentiation front to rear, which could be a pain in some circumstances.

spressomon · 07-31-08, 03:30 PM

Quote:

Originally Posted by Trunk Monkey

That would be one thing that one prevent me from doing it. So, if you lock the center to have 4wd, you no longer have differentiation front to rear, which could be a pain in some circumstances.

Happens to me fairly regularly: I'm on a tight twisty trail and I don't need the traction a locked CDL provides but the shorter turn radius a non-locked CDL provides...

It's always about compromises!

rusty_tlc · 07-31-08, 06:52 PM

Quote:

Originally Posted by Trunk Monkey

That would be one thing that one prevent me from doing it. So, if you lock the center to have 4wd, you no longer have differentiation front to rear, which could be a pain in some circumstances.

Quote:

Originally Posted by spressomon

Happens to me fairly regularly: I'm on a tight twisty trail and I don't need the traction a locked CDL provides but the shorter turn radius a non-locked CDL provides...

It's always about compromises!

So couldn't you just switch to 2WD?

ringpinion.biz · 07-31-08, 07:05 PM

So being that you are going part time an LSD would be fine, but its irrelevent as there is no LSD made for the front of 100 series LC. You may be a little more likely to break a cv if locked in the front, but this would mainly apply to full steer situations with the locker locked. The benifits of a ARB would still outweigh this. If running bigger tires it would be a great time to re-gear though.

Quote:

Originally Posted by steenh

Just looking for a 2nd opinion. '98 Cruiser, elocker in back.

I'm planning on some mods and was going to go with ARB front locker. The shop i'm talking to (an LC shop) has made the suggestion to go with LSD in front and a P/T 4x4 mod.

Reasons are...

ARB might put too much strain on axles. And, if they break, getting out is very tough. (I'm not a mechanic)

LSD should reduce the chance of breakage. Lose a bit of ability as well, but I don't rock crawl the 100... just looking to add a some capability and reduce the chance of breaking.

P/T 4x4 system would make getting out after breakage much easier. Also should increase gas mileage on the highway.

This is a trail truck only. Running 35's, or will be soon.

It sounds like a reasonable alternative, saves a few bucks (that's not driving the decision though), but a bit nervous that I've not once heard of anyone doing it.

Thoughts appreciated.

Trunk Monkey · 07-31-08, 07:10 PM

Quote:

Originally Posted by rusty_tlc

So couldn't you just switch to 2WD?

I'm mostly thinking of snow where you want 4wd, but may hit patches of pavement or won't want the handling characteristics that a spool has on snow.

steenh · 07-31-08, 07:26 PM

Quote:

Originally Posted by ringpinion.biz

So being that you are going part time an LSD would be fine, but its irrelevent as there is no LSD made for the front of 100 series LC. You may be a little more likely to break a cv if locked in the front, but this would mainly apply to full steer situations with the locker locked. The benifits of a ARB would still outweigh this. If running bigger tires it would be a great time to re-gear though.

I've decided to hold off on the P/T system. Not a daily dri