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Gen4 - Selecting 4WD

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10 Feb 2020 23:40 #218275 by Bob1050
Gen4 - Selecting 4WD was created by Bob1050
Interesting weather day today with snow, hail and high winds. Reflecting on the Jimny's progress through the snow - a question - Do forum members use the clutch when moving the selector lever between 2WD and 4WD on the move?

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  • Lambert
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11 Feb 2020 05:12 #218278 by Lambert
Replied by Lambert on topic Gen4 - Selecting 4WD
Dunno. On my push button gen3 it's not a requirement as everything is already rotating at the same speed?

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11 Feb 2020 09:13 #218282 by crash486
Replied by crash486 on topic Gen4 - Selecting 4WD
I for one do. A habit from other 4x4s but it can't hurt.

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11 Feb 2020 11:35 #218293 by Andy2640
Replied by Andy2640 on topic Gen4 - Selecting 4WD
Its a good question Bob.

I have tried both ways, clutch and no clutch. Doesnt make any difference as far as i can tell, and its much easier not to use the clutch rach time. My feeling is its fine to shift without clutch, but 7 times outta 10 i will still use the clutch.

The manual only says to depress the accelerator, which creates more vacuum power i guess.

Mmjhhhhhmmm interesting question.

A wise man once said...... When we are Mean, Shout at People, Lose our Tempers, Swear, and generally act like Tool Bags, Never forget ..... We are all Cavemen in Suits, Uniforms and/or Overalls ..... Living in Semi-Concrete Jungles. Andy - 2019 AD.

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11 Feb 2020 17:56 #218316 by Scimike
Replied by Scimike on topic Gen4 - Selecting 4WD
I have no idea, but let's look at the clues as they say.
I believe the front hubs are the same as a G3, ie vacuum operated. The transfer box is lever operated, the G3 transfer box is solenoid operated, its no more than an electrical lever, so can't see much difference here.
You can happily bang in and out of 4WD high on a G3 without using the clutch, the manual indicates you can do this up to some (cant recall) high mph figure. You only need to stop and preselect foot and steering wheel positions (ref manual) for 4wD low.
So I would guess the G4 is the same, but would have expected it to declare the same MPH limit and preselection details in the handbook as it does for the G3.
Also Andy's done it and it works :laugh:

Having said all that I always try and stop if I can. Selected once 4WD Hi while traveling at 35 ish mph, the bang from the front hubs as they engaged went right over my mechanical sympathy level.
But yes, good question.
Mike

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11 Feb 2020 20:14 #218325 by Lambert
Replied by Lambert on topic Gen4 - Selecting 4WD
The maximum speed is 60mph for 2 to 4 changes but stationary for range changes. When there is actual snow on the ground I will regularly use the 2 to 4 change as the road dictates like when it goes from packed to slush etc. and thus save transmission wind up. It does however require me to anticipate such conditions and have my front hubs in, this also means that I am not experiencing any delay while the hubs engage and then the props link so that reduces the occasions of loud noises from things not quite being in sync. Really though I suspect that the system is like this as a legacy of countries that have more in the way of paved, gravel and dirt road transitions than we have in the UK.

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11 Feb 2020 20:33 #218327 by OctaneJimny
Replied by OctaneJimny on topic Gen4 - Selecting 4WD
As said before you can change from 2H to 4H up to 60mph, make sure your wheels are in the straight ahead position and depress the accelerator
No need to press the clutch. Check the 4wd indicator light has come on and refer to the manual if not. But pressing the clutch will not be a problem but again make sure your wheels are facing straight forward to avoid a jolt through your transmission.

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11 Feb 2020 21:25 #218339 by Dorsetdumpling
Replied by Dorsetdumpling on topic Gen4 - Selecting 4WD
I suppose that dipping the clutch would allow engine revs, and therefore presumably the vacuum to increase?

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11 Feb 2020 21:29 #218343 by Andy2640
Replied by Andy2640 on topic Gen4 - Selecting 4WD

Dorsetdumpling wrote: I suppose that dipping the clutch would allow engine revs, and therefore presumably the vacuum to increase?


Im not sure sbout this vacuum thing, after all, wouldnt the engine be creating a vacuum effect when even idleing, or under engine breaking??

A wise man once said...... When we are Mean, Shout at People, Lose our Tempers, Swear, and generally act like Tool Bags, Never forget ..... We are all Cavemen in Suits, Uniforms and/or Overalls ..... Living in Semi-Concrete Jungles. Andy - 2019 AD.

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11 Feb 2020 21:41 - 11 Feb 2020 21:43 #218345 by Scimike
Replied by Scimike on topic Gen4 - Selecting 4WD
Yes it's present all the time, we even have a small tank to store it.
I believe the "accelerate slightly" is more to reduce the enormous bang as the front hubs engage. The forces under engine braking are larger than under slight acceleration, ie it's a speed match as they engage / disengage.
Just my idea.
Mike
Last edit: 11 Feb 2020 21:43 by Scimike.

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11 Feb 2020 22:54 #218347 by Bob1050
Replied by Bob1050 on topic Gen4 - Selecting 4WD
Thanks for your thoughts/experience - appreciate your input. As Lambert indicates on a G3 the system is selected by a button/electrical connection - so depressing the clutch will have zero to add to the process. As for keeping the accelerator depressed - I can understand the logic. Andy2640 has discovered from personal experience on his G4, that not using the clutch doesn't lead to catastrophic transmission failure - Phew!

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12 Feb 2020 12:09 #218369 by Daniel30
Replied by Daniel30 on topic Gen4 - Selecting 4WD
thought it was the same as a gen3 but the leaver connects the micro switch instead of a button on the dash, the lever is there for the more classic/ retro look :)

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