Wheels off ground = No hand brake

[10G]

I've come across this the last 2 times I've had the Patrol up on stands.

If the rear wheels are off the ground, the hand brake does nothing. Car in neutral, hand brake on hard, I can still turn the rear wheels. Is that normal? I've never come across that before.

[dom14]

I've come across this the last 2 times I've had the Patrol up on stands.

If the rear wheels are off the ground, the hand brake does nothing. Car in neutral, hand brake on hard, I can still turn the rear wheels. Is that normal? I've never come across that before.

Are you saying if the rearwheels are on the ground then the handbrake works fine?

Handbrake drum is in between the rear driveshaft & gearbox.

If there is no handbrake at all, you should immediately address it by adjusting the handbrake.

Even with the LSD arrangement it makes no sense. Once the rear driveshaft is locked by handbrake, the pinion gear can't move and then the crownwheel can't move. That means wheels can't move regardless of what spider gears can do. This is true regardless of whether you lift one wheel or both rear wheels up.

What I dunno is whether GUs have the handbrake arrangement somewhere else other than the above location between the driveshaft & gearbox. But, I seriously doubt that makes any difference at all.
Or whether it has some clever arrangement to cancel the handbrake when rear wheels are off the ground and transfer the handbrake to front wheels. That would be something I would love to see.

[sooty_10]

The handbrake is on the transfer case, not the rear wheels directly. The rear diff is still between the brake and wheels. Do both wheels spin together? Or opposite directions?

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[10G]

The handbrake is on the transfer case, not the rear wheels directly. The rear diff is still between the brake and wheels. Do both wheels spin together? Or opposite directions?

Sent from my SM-G950F using Tapatalk

I didn't look. I was putting the wheels back on on the weekend and went to tighten the nuts a bit and the thing span around. I went into the cabin, yanked on the handbrake and it was full on. I just parked on a mound at lunch today, the handbrake works well, no problem.

I would think that if the handbrake is on, it's on, weird.

[dom14]

Apologies. This post was meant to be a new thread. Somehow ended up accidentally posting on this thread.

Mods, pls delete this post.

[dom14]

The handbrake is on the transfer case, not the rear wheels directly. The rear diff is still between the brake and wheels. Do both wheels spin together? Or opposite directions?

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Yeah, but once the rear driveshaft is locked, we shouldn't be able to turn the wheels, right?
That's what the handbrake effectively does, right?
And if the 4WD engaged and auto/manual hubs engaged, we effectively have four wheel handbrake, right?
In other words, handbrakes are still effective even if the rear wheels are lifted when the 4WD+front auto/manual hubs engaged, right?
Or am I confused?

[10G]

You're correct.

Once you pull the handbrake up, the wheels whichever wheels, shouldn't spin irregardless of how the handbrake mechanism works.

[Tip12345]

well the wheels will still spin one forward and one backwards with the tailshaft locked . me thinks ....

[10G]

I don't think I understand all this?

How would the wheels become 'disconnected' from the drivetrain if they are lifted off the ground? There's a hole in my knowledge I think.

[sooty_10]

Potentially the free spinning effect of an LSD, especially a worn no limiting one? One wheel forward one backwards. The driveshaft sits still. Someone more diff knowledge then me would know. Simple way is to put car in 4x4 and leave it in gear. Front wheels will keep everything from spinning.

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