4H to 4HLc

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vvandam

4H to 4HLc

Wed May 11, 2011 8:39 am

Hi

I know on my 3.5 V6 I can move from 2H to 4H while on the move with Super Select. But what are the rules from going from 4H to 4HLc?

Thanx all
pierreandre
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Re: 4H to 4HLc

Wed May 11, 2011 8:54 am

Same rules apply. Can be done up to 100km/h. Only 4HLc to 4LLc requires you to stop and put it into neutral.

PS. This is from the Gen 3 user manual. I think Gen 2 and 4 with Super Select are the same.
Pierre-Andre
2001 Pajero 3.5 GLS LWB
2001 Colt 3000i 4x4 D/C (SOLD)
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vv
vvandam

Re: 4H to 4HLc

Wed May 11, 2011 9:00 am

When would be the best time to use 4HLc?
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SimonB
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Re: 4H to 4HLc

Wed May 11, 2011 9:06 am

vvandam wrote:When would be the best time to use 4HLc?
I lock the centre diff every time I leave the tar (4HLc) but there's been a bit of debate here on the forum on whether this is absolutely necessary, but you will want to use 4HLc every time traction might be compromised, such as sand, mud, trails where Low Range is not entirely necessary etc.
Simon Bloomer
'96 3.5V6 GLS LWB Pajero
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JohanV
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Re: 4H to 4HLc

Wed May 11, 2011 9:10 am

this is how i use it.
4H - Wet tar roads and highways when raining
4H - Gravel road
4HLc - Wet gravel muddy sandy road
4LLc - When needed for extra traction and on trails when needed.
4LLc with rear lock - When i am in the Image. :)
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Gerrit Loubser
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Re: 4H to 4HLc

Wed May 11, 2011 10:22 am

It is OK to engage the center diff lock (i.e. select 4HLc) at speed. I have done this with no drama at 80km/h+. The important thing is that one should ensure that there is no relative motion between the front and rear propshafts when engaging the center diff lock (don't engage when cornering or when any wheel is spinning out).
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tonton
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Re: 4H to 4HLc

Wed May 11, 2011 10:43 am

The only time you HAVE to stop is when changing from high- to low range and vice versa.

I also try to keep a safety margin below 100km/h, but have shifted at 100.

I use centre difflock as per Simon's comment. I tested the difference recently on my trip via the S/Cape (old) passes, and found that the car was less prone to drift when it hit corrugated parts, and ligned up nicely out of corners. I guess that will be more relevant when driving at high speed, which I did not do.

Anton
Pajero 3.8 GLS (A) LWB 2007 (Gen 4)
Pajero 3.5 GLS (M) LWB 2000 (Gen 2.5) SOLD
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Gerrit Loubser
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Re: 4H to 4HLc

Wed May 11, 2011 11:50 am

SimonB wrote:I lock the centre diff every time I leave the tar (4HLc) but there's been a bit of debate here on the forum on whether this is absolutely necessary...
I think this might be the thread that Simon was thinking of:

viewtopic.php?f=25&t=1611
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2003 Toyota Land Cruiser 100 VX TD

2003 Mitsubishi Pajero 3.2 DiD LWB A/T Gone & missed :-(

1999 Nissan Patrol 4.5E GRX M/T: Gone & missed :-(

1996 Toyota Land Cruiser 80 VX 4.5 EFI A/T: SOLD
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Gemaskerde Tuinvurk
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Re: 4H to 4HLc

Thu Aug 11, 2011 3:21 pm

on the Gen 4 - engaging the 4HLc turns off stability control...

My personal experience has been that stability control can be a life saver on gravel roads. It is incredible at regaining control of a vehicle in an emergency situation.
Karl

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RoelfleRoux
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Re: 4H to 4HLc

Tue Aug 16, 2011 6:07 pm

Gerrit,

Thanks for reminding us of that other thread. This is a quote from what I wrote there
We did a little test with a 2003 DiD LWB GLS (no electronic traction or stability control) a few months ago:
Parked on wet grass and accellerated in 2H, no surprise, good rear wheel spin.
Repeated test in 4H, NO rear wheel spin. Not even for a split second. The car just shot forward.

For my money: I do not believe that 4HLc will add any benefit (over 4H) on a normal dirt road. All you achieve is potential drivetrain windup. That is just my opinion and the way I prefer to drive my Pajeros
I still follow my own rule here and am quite happy to stand alone :D

kmroloff,
On the Gen 3 the S/C is only disabled in 4LLc. In your case there is NO argument to lock the C/D for more stability. The S/C saved my sorry bacon on at least one absolutely undisputed occasion on a dirt road.
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