06 jimny - how to check engaging 4wd?

The easiest thing is to get the dealer to demonstrate it if he doesn't think there is anything wrong with it. :whistle:
If he's got the type of lift that leaves the wheels dangling you can see if the front wheels turn in 4wd.
If you want to try it yourself you can turn the front prop easily by hand in 2wd.
The prop should be locked in 4wd and turn the front wheels if off the ground.
If you listen carefully you will hear the front hubs clicking into place as well.
If this doesn't happen I would suggest the dealer is wrong and walk away again.

markyp2000 wrote:

kirkynut wrote:

facade wrote: 4wd = hubs go click click and wheel will not rotate, just moves a little each way.

Not true. The gearbox is in neutral so it will turn, albeit it will turn the prop, the transfer box gears and some of the gearbox gears and might take a bit of effort.



i was lead to belive there is no center diff in a jimny so if one wheel at the front is jacked up how will it turn the gear box seeing the rear wheels and the other font wheel is on the ground and there is no center diff to spilt the drive unevenly between front and rear so i it wont turn correct me if im wrong

Read the comment properly Mark. Some of the gearbox, not all because it's in neutral but the mini prop into it will spin along with some of the gearbox but due to it being in neutral will not transmit any drive so will spin some of it. Not alot but some of it. You being the knowledgable mechanical type will be able to say what parts.

If it were in gear you're right, but it would've stalled and disengaged the hubs through no vacuum or run him over and killed him by which point it doesn't matter anyway.

Kirkynut

facade wrote: Unless the push button jimny has a centre diff, with one wheel off the floor and the handbrake on, the only thing that can turn is the opposite front wheel, and that will have to skid backwards, you will need to be very strong for this to happen.

No, the gearbox is in neutral, so it is not transmitting any drive so it can spin. The effort spins the transfer box and them some of the disengaged gearbox gears. If it were in gear yes. Just like if you were trying to undo the crankshaft pulley bolt with the car in gear to stop it spinning etc.

Kirkynut

What you have missed Kirkynut is that with the back wheels on the floor and the handbrake on the rear propshaft cannot turn.
4wd simply locks the front and rear propshafts together by sliding a collar across between the front end of the rear output shaft, and the rear of the front output shaft.

Now that means the front propshaft can't turn either, so if one front wheel can turn with the other stationary, the hubs don't lock, or something is broken inside the front axle.


In a proper full-time 4wd, equipped with a centre differential, like my RAV4, with the gearbox in neutral you can turn 1 front wheel on its own, but it is hard work as you have to turn all the gearbox and transfer gears as well. In park you can't turn anything as the transmission is locked.
With one front and one back wheel on the same side off the ground, and the transmission in park, turning the front wheel results in the back wheel turning the other way because of the action of the centre differential.

Try this in a jimny and both wheels will turn the same way.


Back to the OP, if you don't think that it is working, buy another- plenty about

kirkynut wrote:

markyp2000 wrote:

kirkynut wrote:

facade wrote: 4wd = hubs go click click and wheel will not rotate, just moves a little each way.

Not true. The gearbox is in neutral so it will turn, albeit it will turn the prop, the transfer box gears and some of the gearbox gears and might take a bit of effort.



i was lead to belive there is no center diff in a jimny so if one wheel at the front is jacked up how will it turn the gear box seeing the rear wheels and the other font wheel is on the ground and there is no center diff to spilt the drive unevenly between front and rear so i it wont turn correct me if im wrong

Read the comment properly Mark. Some of the gearbox, not all because it's in neutral but the mini prop into it will spin along with some of the gearbox but due to it being in neutral will not transmit any drive so will spin some of it. Not alot but some of it. You being the knowledgable mechanical type will be able to say what parts.

If it were in gear you're right, but it would've stalled and disengaged the hubs through no vacuum or run him over and killed him by which point it doesn't matter anyway.

Kirkynut

no it wont if both front wheels are off the ground and in 4wd the if you turn one wheel one way the other wheel will iether turn backwards or fowards but if one front wheel is on the ground and in 4wd then the wheel wont turn as it DOESNT HAVE A CENTER DIFF to split the drive like facade said prove me/us wrong and try it

markyp2000 wrote:

kirkynut wrote:

markyp2000 wrote:

kirkynut wrote:

facade wrote: 4wd = hubs go click click and wheel will not rotate, just moves a little each way.

Not true. The gearbox is in neutral so it will turn, albeit it will turn the prop, the transfer box gears and some of the gearbox gears and might take a bit of effort.



i was lead to belive there is no center diff in a jimny so if one wheel at the front is jacked up how will it turn the gear box seeing the rear wheels and the other font wheel is on the ground and there is no center diff to spilt the drive unevenly between front and rear so i it wont turn correct me if im wrong

Read the comment properly Mark. Some of the gearbox, not all because it's in neutral but the mini prop into it will spin along with some of the gearbox but due to it being in neutral will not transmit any drive so will spin some of it. Not alot but some of it. You being the knowledgable mechanical type will be able to say what parts.

If it were in gear you're right, but it would've stalled and disengaged the hubs through no vacuum or run him over and killed him by which point it doesn't matter anyway.

Kirkynut

no it wont if both front wheels are off the ground and in 4wd the if you turn one wheel one way the other wheel will iether turn backwards or fowards but if one front wheel is on the ground and in 4wd then the wheel wont turn as it DOESNT HAVE A CENTER DIFF to split the drive like facade said prove me/us wrong and try it

Right then chaps - I am rather full on humble pie :blush: - you were right and I was wrong and I can understand why - the gearbox has nothing to do with it - the transfer box is locking the front and rear together when in 4wd and is independant from the gearbox - the gearbox just transmits the drive from the engine to the transfer box for it to transfer the drive to whatever you've put it in - 2 or 4wd.

Kirkynut