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Blinking 4x4 lights #1011367 10/20/10 08:22 PM
Joined: Nov 2009
Posts: 227
xFezx Offline OP
Wheeler
I have read the threads about the lights, but I just want to make sure that it is okay to drive on the highway (over 65) because as I understand it isn't actually trying to lock in, just confused. The lights aren't always blinking, sometimes they don't blink after turning the truck on. Eventually I will replace them with manuals along with a locker. It's good to hear there is a direct go to guy that is brave enough to drag them through the airports. <img src="/forums/images/graemlins/barf.gif" alt="" />


You can call me Fez
'95 SR 15x8 steel rims w/ 33x12.5 Duratracs, cranked torsion bars, "Baja" lights
'09 Nissan Sentra SR
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Re: Blinking 4x4 lights [Re: xFezx] #1011368 10/20/10 09:20 PM
Joined: Apr 2009
Posts: 120
WigWiggy Offline
Wheeler
Just to clear up one thing for you - switching to manual hubs won't solve the problem as the genII system engages at the front diff. Central axle disconnect I think it's called. The hubs don't disconnect like they do in the gen1. Your front wheels are always turning the front axles, even when in 2WD.

As long as your t-case lever is in 2hi, and it doesn't 'feel' like you're in 4WD, and you don't hear any horrible grinding noises, it should be fine to drive at speed. That's been my experience at least.


98 Montero, 184k.
Re: Blinking 4x4 lights [Re: WigWiggy] #1011369 10/21/10 03:47 AM
Joined: Jun 2002
Posts: 6,208
JohnnyBfromPeoria Offline
Trail Leader
*****
Kind of off topic, but can't you drive a Gen 2 in AWD/4-hi-unlocked central diff at any speed, on any road surface?

Yes, CAD, or central axle disconnect, is how a Gen 2 goes into 2wd. Adding manual hubs will disconnect the wheels from the axle shafts, perhaps saving a bit of wear and tear and possibly netting a slight MPG gain. And, if you're so inclined, you can engage 4-low-loc with the hubs unlocked and get low-range two wheel drive. You can also forget that you unlocked the hubs, put the transfer case in AWD/4-hi-unlocked center diff and see how effective the combination is at sending torque to the non-functioning front drive axle. Yes, I've done it, and wondered why the truck was revving and not moving so well. Oops.

John B.


'87 Raider 2.6 Turbo Auto, Under Construction
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Re: Blinking 4x4 lights [Re: JohnnyBfromPeoria] #1011370 10/21/10 07:25 AM
Joined: May 2009
Posts: 435
4ePikanini Offline
Mudrunner
Gen2 super select

Basically there are three main things that get detected by the transfer case, and front diff actuator sensors, that play a part in the flashing lights system. The sensors detect whether the transfer case is in 2H, 4H or 4HLc (4LLc to the ECU is the same as 4HLc)

When the sensors on the transfer case doesn't correspond with what the sensor on the vacuum actuator detects, then you will have the flashing lights. Either way.

So if the front diff vacuum actuator senses that the right sideshaft is engaged but the transfer case sensor detects that you have selected 2H then the lights will flash.

Also if the front diff vacuum actuator senses that the right sideshaft is disengaged but the transfer case sensor detects anything other than 2H then the lights will flash.

On the Gen2 the centre diff is 100% mechanical. ie. if you select 4H then the front and rear propshafts are connected via VCU. If you select 4HLc or 4LLc you will lock the front and rear propshafts together.


2H
When you select 2H the engine drives the rear propshaft and the front is disconnected inside the transfer case. The front left sideshaft is connected to the front diff. The vacuum actuator disconnects the front ride sideshaft from the front diff. The front propshaft gets driven via the left front wheel through the diff.

4H
The transfer case attaches the front and rear propshafts via a viscous coupling and the front right sideshaft gets engaged via vacuum actuator to the front diff.

4HLc
This the same as 4H but the front and rear propshafts are solidly connected to each other. The middle amber light on the dash illuminates.

4LLc
Same as 4HLLc but low range gears



In a nutshell then the selection on the super select transfer case is all mechanical except for the engagement of the front right sideshaft to the front diff via a vacuum actuator that gets controlled through a small ecu box behind the radio based on sensor inputs on the transfer case.



Karma's Law - For every action there is a multiplied reaction!
93 Pajero GLS 3.0 V6 LWB - SOLD
2001 Gen3 Di-D LWB - SOLD
2005 Touareg R5 2.5 TDi
Re: Blinking 4x4 lights [Re: 4ePikanini] #1011371 10/21/10 01:37 PM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline
Web Wheeler
*****
Archive the afrikaaner's post above please. best description of super select so far - in the tech threads I would think.


Not responsible for advice not taken...
Re: Blinking 4x4 lights [Re: fasteddy] #1011372 10/22/10 03:42 AM
Joined: Jun 2002
Posts: 6,208
JohnnyBfromPeoria Offline
Trail Leader
*****
Also makes an even greater case for having manual hubs on a Gen 2.

Back to my off-topic leanings, can anyone else confirm that a Gen 2 can be driven in 4-Hi-unlocked/AWD at any speed, on any road surface?

John B.

Re: Blinking 4x4 lights [Re: JohnnyBfromPeoria] #1011373 10/22/10 07:20 AM
Joined: May 2009
Posts: 435
4ePikanini Offline
Mudrunner
4H can be driven on any surface at any speed (disclaimer : when safe to do so within legal limits) but must be selected at under 100km/h (60mph). In other words 4H = AWD

4HLc can be driven on anything other than a high grip (concrete, tar, rock etc) surface.

2H - economical RWD
4H - Tar, good gravel (AWD)
4HLc - Snow, Ice, mud, bad gravel
4LLc - heavy stuff

Last edited by 4ePikanini; 10/22/10 08:13 AM.


Karma's Law - For every action there is a multiplied reaction!
93 Pajero GLS 3.0 V6 LWB - SOLD
2001 Gen3 Di-D LWB - SOLD
2005 Touareg R5 2.5 TDi
Re: Blinking 4x4 lights [Re: 4ePikanini] #1011374 10/22/10 04:12 PM
Joined: Jan 2001
Posts: 13,649
fasteddy Offline
Web Wheeler
*****
add to 4LLc, for any creeping except on dry hard surface-center diff binding. I'd like a straight 4lo with the cdiff unlocked, too.

Isn't there a way somebody posted once upon a time about rewiring the switching to add more flexibility like that one?


Not responsible for advice not taken...







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