I thought similar, but from my interpretation I think the idea was that due to the rear diff being unlocked, one of the tires would still be able to rotate if the other couldn't. Kind of like the transferase where when unlocked, one of the driveshafts could rotate, even if the other was unable to. If the wheels were on the ground or constrained it would be true, since any mechanical movement would be applied to both wheels and the driveshaft.

If you rotate both tires at the same time, it should force the rear driveshaft to spin (assuming car is in neutral and theres no other mechanical load on it). If the parking brake was applied, each tire when rotating at the same speed should be hard or impossible to turn

You could also just roll the car with the transmission in neutral, and apply the handbrake and see if it stops/slow down. You can use 1-2 people to push the car a bit. Or try and rotate the rear driveshaft, but you won't be able to test a heavy load on the driveshaft by hand. Using a pry bar stuck in where the u joints are you could add more torque/power. I've done it and I wouldn't recommend it.

Apologies if its still confusing, I'm not the best at explaining.

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"yes Harvir is right and the others have no idea what they are talking about". This isn't constructive nor appropriate. By all means, compliment and or point out what worked the best. But it's not necessary nor respectful to comment on misunderstanding or confusion on a topic. All users on this thread have provided valuable insight on trouble shooting, problems, and providing ideas on a large variety of topics. Not only to me personally, but hundreds of others. You can see they have over 2,000+ posts each, and have been active for 5+ years. Showing they provide help, comments, and have asked questions themselves!

"how about not posting unless you know what you are talking about". You came to an online community for help on a problem you were having. Showing that you didn't know the answer nor have a complete understanding on the parking brake and how it works within the driveline. All of us provided information about it, and when different ideas were being discussed there was no foul play or criticizing the other user. None of us claim to know everything, nor are we saying we are always right. But there was truth in the majority of the comments. I could see misunderstandings being at play. I pointed out my own potential misunderstanding/interpretation. I'm by no means saying I'm an expert. I will admit I was mistaken on the rear diff allowing each wheel to move independently, because there is no locker in place to connect them at the same speed. When I was dealing with a parking brake issue on mine, I had a center and rear locker, which I used in my testing. That is why I specifically say my signature that my comments from experience and should be taken with supplemental information.

Why would you criticizing others when they are offering you help? No one here is required or obligated to give you a response. Each person here took time out of their day to answer your question and its extremely disrespectful when you suggest that they shouldn't post. Everyone who visits this forum is either asking for help, providing help, or learning based of the contents of the forum. I want to call out unkind behavior not people, no hard feelings from me.

 

my point is that you should not reply unless you know. Say that i took your advise or mollusk"s advice, I would be spending money and wrenching on parts, wasting my time when there is not any issue.

 

As in any vehicle forum, we offer our advice (for free). None of us knows everything. A lot of us are quite experienced yet we sometimes disagree with each other. No one should be bashed for offering advice. All comments need to be welcomed. Each of us as owners need to weigh the information we get and make our own decision. We are the ones who ultimately will live with that decision. I offered my perspective, Richard offered a different perspective. I don’t know which of us is right. I’d need to jack up my vehicle and test it to check.

 

so wrong advice that leads to more time and money is good?

 

We are a forum. We are not Land Rover giving you official information.

 

sorry did not know the men on here are so sensitive

 

i should have said some of the people are sensitive

 

Instead of being abusive and telling everyone they're wrong, why don't you go back to your own scenario. If the parking brake is on and BOTH rear wheels are on the ground (as you imply), they will not roll. If only ONE is immobile/on the ground, the other MIGHT roll. But that would be hard to do in the scenario you describe.



Apparently even you don't know what you are talking about.

 

If the rear diff is open, then yes the rear tires can still spin if they are both off the ground and the hand brake is on. However, they will spin in opposite directions since the driveshaft won't spin. So you won't be at any risk of the vehicle rolling away, as the only way the tires will rotate in the same direction is if the driveshaft is also spinning. As others said, you can verify by trying to turn the driveshaft by hand. But this is literally just how open diffs works.

Also as someone else said, if the t case is unlocked, the front end can still roll. If locked, then the front end should not be able to roll either.

 

You didn't tell us directly what your goal/need is that drove your question. In that later post it seems that you want to jack up one end without anything rolling away. Is that what you are looking for? If so, your tcase needs to be in gear and your tranny needs to be in Park (or in gear, if a manual). BUT, the real answer is you should be chocking your wheels rather than relying on the mechanicals in the drivetrain.

Your question was vague, so the answers you received were a bit all over the map. A more precisely worded question giving a little context will get you higher quality answers in the future.