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Old 30-01-18
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Default 4 Low unlocked

So twisted32 very graciously developed a problem in his NW to take my mind of the problem I have in my NT - no centre diff lock.

I can still get low range, and all the lights are happy. It's not an electrical problem. The way my Gen 4 box is designed, if the actuator selects low range is has also locked the centre diff.

But on steep climbs I realised something was wrong, and have recognised a number of new situations:
1. Traction control was working much harder than I was accustomed, on tracks I had driven before (and others in the group with similarly equipped Gen 4s were experiencing much less intervention).
2. With rear ARB locker selected, traction control was still working hard, and cutting out on me - unheard of on the climbs we were on, and others weren't having the same problem (no, not a tyre issue - good tyres, lower than anybody else).
3. Watching the traction control lights, I was regularly getting one front (lightly loaded) light flashing at a time. With centre diff locked, a wheel needs to spin on each axle - it's not unusual to occasionally have TC flash only one light, but not as often as I was having.
4. On steep descents, as wheels lifted and the vehicle tried to run away, the brake intervention (whatever it's called) would activate, and flash one rear (lightly loaded) light at a time - again, with centre diff locked, it should detect issues with one front and one rear.
5. Back at camp, where I would normally need to revert to 4H for reversing my Paj into where I normally park (position the rear door under one edge of my gazebo) it was quite happy to do so in 4LLc.
6. I spent some time doing low speed circles in different modes, and could detect no difference in full-lock circles in any of the 4wd modes.

So, I'm convinced my centre diff isn't locking, but I also have no doubt that low range is working.

What's happened?
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Project: NJ SWB. 285/75R16 ST Maxx, 2" OME suspension, 2" body lift, ARB 110, 120l tank, bullbar, scratches, no major dents. Fully engineered in SA. NW DiD & auto in place - a long way to go....
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Old 30-01-18
twisted32 twisted32 is offline
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Originally Posted by nj swb View Post

What's happened?
You have been having too much fun for the past year, and the transfer police say "no"
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Old 30-01-18
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Quote:
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You have been having too much fun for the past year, and the transfer police say "no"
Ha ha More like as soon as you cross the border
Dave
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Old 30-01-18
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Quote:
Originally Posted by twisted32 View Post
You have been having too much fun for the past year, and the transfer police say "no"
Ha ha More like as soon as you cross the border
Dave
So it will all return to normal once I get home?
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NT Platinum. DiD Auto with 265/70R17 MT51, Lift, Lockers, 3.15 gears, LRA Aux tank, bullbar, winch, lights, lots of touring stuff. Flappy paddles. MMCS is gone!

Project: NJ SWB. 285/75R16 ST Maxx, 2" OME suspension, 2" body lift, ARB 110, 120l tank, bullbar, scratches, no major dents. Fully engineered in SA. NW DiD & auto in place - a long way to go....
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Old 30-01-18
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Originally Posted by nj swb View Post
So it will all return to normal once I get home?
Yes, because you won't be using the centre diff lock as a Toorak tractor....
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MY14 GLX Pajero DID auto with Lift, 265/70 R17 MT51s, Full Bushskinz plates , Scotts Rods 3" TBE, Johnny Tig FMIC, TME ECU remap, Provent, OL Bullbar, Ironman 9500lbs winch, dual batteries, torque converter lockup, nomad valve body, aeroflow AF72-6000 transmission cooler with 9" fan and radiator cooler bypass, 3.15 reduction gears, traction contol mod (on/off), Uniden 8080S, flappy paddles, Rhino flat rack mounted on ARB rails, 42" Stedi ST3K light bar and custom drawers
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Old 30-01-18
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Haven't gen 3 and 4 paj owners wanted this as an option for ages? When you find what's going on you might be able to sell the secret to others for easier reversing trailers uphill etc.
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Old 31-01-18
NJV6 NJV6 is online now
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Given the centre diff is locked when in 2H, how does it behave in this mode?
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Old 31-01-18
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I’m getting increasingly worried about the strength of these gen 4 transfer cases!

Have you had a chance to check the oil?

I’m wondering if its physically destroyed the centre diff lock mechanism/splines?

Between you and Twisted32, it sounds like a trip of carnage! Not good
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Old 31-01-18
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The saying used to be "play hard or go home" maybe it should be "play too hard and you won't get home".

Over diameter tyres, diff locks and power enhancements all put extra load on the "mechanical fuse" that is between the engine and driveline, in a manual transmission it is the clutch and in an automatic it is the torque converter. Travel heavy and or play hard and the nearer you are to "blowing the fuse", at some stage you will go over the limit and something will break.

Walking the fine line between recreational and "wreak-reational" is something many of us do regularly that go offroad, sometimes the line gets crossed and we get away with it and other times we do not.

OJ.
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Old 31-01-18
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Quote:
Originally Posted by NJV6 View Post
Given the centre diff is locked when in 2H, how does it behave in this mode?
Good question - I don't know.

For some time now I haven't been using 2H because I had flashing front wheel lights, and I could hear the transfer shift mechanism "hunting" - presumably for the switch indicating 2H. 4H worked fine, so I was lazy and didn't attempt to fix it.

Until I recognised that I had this problem, I had no issues changing between the 4wd modes, but on this trip (after I realised my centre diff isn't locking) I began to have trouble - the actuator would drive, but then all the green lights would go off and the centre diff light flash. With a bit of mucking around I can select any mode I choose, and the dash lights work as they should for that mode - except the flashing front lights in 2H mentioned above.

Off road, I can still access 4L, and I can still lock my front & rear diffs - in the immortal words of Meatloaf, two out of three ain't bad.
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NT Platinum. DiD Auto with 265/70R17 MT51, Lift, Lockers, 3.15 gears, LRA Aux tank, bullbar, winch, lights, lots of touring stuff. Flappy paddles. MMCS is gone!

Project: NJ SWB. 285/75R16 ST Maxx, 2" OME suspension, 2" body lift, ARB 110, 120l tank, bullbar, scratches, no major dents. Fully engineered in SA. NW DiD & auto in place - a long way to go....
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