Breaking the driveshaft

When I break the driveshaft (to the rear wheels) on a 4wd version of the car why does it stop delivering torque to the front wheels aswell?
Same thing happens if I make the car fwd only

 

There's no way to lock the center differentials right now.

 

Its a fairly realistic behavior for an unlocked centre diff really.

 

Not on a 4WD pickup truck. When you use 4 high or 4 low, the front and rear driveshafts are usually locked together. That's why they say in the owner's manual, not to use 4wd in dry conditions.

 

I assume you have a 4WD?

 

I have an AWD car.

 

That wouldn't be an unlocked centre diff though whereas I said it would be realistic for an unlocked centre, I never mentioned locked ones where of course you would be correct.

 

My mistake, you are correct. Even vehicles with a center lsd won't go far at all relying on the lsd alone.

 

My mum damaged the rear differential locker on her car once because she didnt know what the button labelled "R/D Lock" was for. Kept pressing it while driving along at 70mph, wondered what the horrible sound of breaking metal from the rear of the car was. Long story short: don't know what buttons do, don't press them.

Only the locker itself was damaged. Diff still functioned unlocked. So at least the whole unit didn't need replacing.

She still doesn't understand what a differential is or why you would want one locked or unlocked.

 

The centre diff on the cars in this game are locked. You will never find that you can spin 1 of the wheels when driving around, if the centre diff was open you wouldnt go anywhere when one wheel was in the air. You can also take the rear or front wheels off and drive around.
So I assume its just a bug or something.

 

I just tried hanging 1 wheel of the D15 over the edge of a bridge and then driving, only the wheel over the edge span properly, the others went very very slowly (which seems to more be from the fact that the game doesnt appear to have fully open diffs by default, still a tiny bit of friction)


Or I genuinely may not have had the torque as I think the car had bottomed out. Perhaps need to do some more research.

 

Drive it up a ramp or something with the one side, also if you take the front wheels off, the back wheels spin quite strongly, vice versa.

 

Locked, is different than an LSD, which is different from open. Right now we have open diffs, and LSD diffs. No locked.

 

We are talking about the center diff in the 4wd cars.

 

And most 4wd/awd cars have center LSD's.

 

In BeamNg they are locked/don't exist.

 

They dont exist in BeamNG, or they're LSD as most.

You can keep saying they're locked all you want, but locked diffs do not exist in BeamNG, there is no code that can lock diffs anywhere, which means there is no way for what you say to be true which means you're wrong...

At very most they're LSD's that allow very little slip.

 

Some of the vehicles it wouldn't be realistic to be driving around on just the front driveshaft anywho. The pickup for instance (modeled after a '88 to '98 Chevy 1500) would require a trans plug before you could go anywhere after removing the rear driveshaft (and some trans fluid). A Ford however could do that because the driveshaft has a yoke on both ends.

 

Just tried it in the D15 sport with the standard front transfer case added (quicker to spawn sport and add 4wd than it is to add sport springs to a 4wd car). I wanted the stiffer springs just so I could ensure the 4th wheel was in the air at all times. Drove up edge of ramp, rear right wheel was in air. Sure enough, car did not budge, instead the 4th wheel span.

Having checked the JBeam. There isn't a centre diff specified that I can see. My opinion is that the game engine itself is probably simulating a fully open diff between the 2 axles.

 

Are you sure the left front wasnt spinning?
It actually doesnt act like any normal diff, if you put on the handbrake while at speed only the back wheels lock up-acts like an open diff
but if you hang it on its belly with all the wheels in the air and put the handbrake on and try to accelerate none of the wheels turn-acts like a locked diff.
Another thing I've noticed is that the limited slip diffs dont really work.