Check Lists

[Jim_K]

Has anyone created a checklist for offroad mode / engaging all the lockers that you are willing to share? I have not yet become familiar with all the steps to go from normal driving to engaging all the lockers. I'd like to create a checklist and laminate it to have handy until I become familiar with the process. I figured maybe someone has already created and save me the work

 

[anand]

The manual states it pretty clearly, but a quick summary:

• Off road mode is independent of the locking diffs. Off road mode is a long press, release, second press, then accept on the screen.
• Center diff can be locked at low-ish speeds (there's an early document with the actual speed, from the PTO1 era)... I would certify "low-ish" as <25mph
• High Range -> Low Range (or reverse), you must be stopped with the transmission in neutral. Be intentional with the shift, it requires a bit of effort, especially when they are new. MAKE SURE the collar is seated/locked before attempting to put the vehicle in drive again. Give the transfer case shifter a good wiggle to make sure it is where it is supposed to be. If you put it in drive and hear grinding, don't try to fix it by moving the shifter, just turn the truck off immediately. This will put the transmission into park, then restart the vehicle and try again.
• Rear diff lock requires low range and the center diff to be locked, and is just a single press. The indicator will blink until the vehicle confirms it is locked (or unlocked). It does not mean that the differential is not (or is still) locked if it is blinking, just that it hasn't confirmed it. The confirmation comes from wheel speed sensors so it can take quite a few rotations to verify this.
• Front diff lock requires the rear diff lock, but in locking/unlocking is the same process as the rear.
• If any differentials "upstream" in the sequence are unlocked, all others downstream will unlock as well.

Remember that there is a time and place for axles to be locked, and it absolutely isn't "everywhere off road"

 

[MTNDOG]

Thread 'Off Road Functions Quick Start Guide'

Nov 21, 2023

I've had a go at drafting a simplified Off-road Functions Quick Start Guide which may be of use to new owners. I would welcome any feedback.

UPDATE - SEE #14 FOR REVISED DRAFT

• Michael H.
• off road
• Replies: 30
• Forum: Maintenance, Tutorials, Tips and Scheduling

• 
• 

 

[TheDocAUS]

Try @Michael H.'s Table in the Rok Dr Guide. For diff locking remember the order is centre, rear and then front.

 

[Nadir5]

...If you put it in drive and hear grinding, don't try to fix it by moving the shifter, just turn the truck off immediately. This will put the transmission into park, then restart the vehicle and try again.

Among the scarier moments in my Grenadier - "oh shit!" Was trying to go from High to Low for the firs time (center unlocked). Can't recall if I just shifted back into neutral or shut it off. Abandoned the effort after a couple of unsuccessful tries. Found that going from High-locked to Low-locked was a lot easier. After having had it off road a few more times I can confirm it definitely gets easier with each iteration - no more scary grinding moments.

My only addition here, is that despite the fact that the "enclosure" around the lever is square, the movement of the lever does NOT match that square. For example, on my truck the movement from high-locked (lever in upper right corner) to low-locked puts the lever about halfway between the lower corners, not at the lower right corner as one might expect by appearance.

 

[Dokatd]

I'd recommend engaging low range or alternately high range with a very slow roll of maybe 1mph ish. Or engage on a slight slope. Basically shift trans into neutral while still rolling say 5-10mph. Then as you roll to a stop shift the T-case into hi or low as needed just before you stop. You won't have to force it at all. This is the same procedure for rovers with the LT230 transfer case.