Zerobricks

I think the issue lies in the steering rack design which is a bit like a letter C. Because the steering rack uses beams and connectors to attact to the steering arms, it's very prone to being bent/stretched out. Once that happens you get a lot of toe out and friction.

And here's a silly PC upgrade, something to make it more lively:

Use the 46490 hubs, they will provide the necessary gearing. Also, the differentials have a bit of down gearing too, 1,4 to be exact, so total with the hubs should be around 7,5. That's plenty when powered by 2 BuWizz motors.

And they all use some kind of a mechanism that would be otherwise impossible to manufacture in one go.

Great progress of a really awesome set, Grum. Regarding 15100, there are actually 2 versions, newer ones released after 2022ish are a lot softer and have a different pin shape. I remember originals from 42096 and those were really tight.

I recomend you check sets like 42114 and 42131 to see how the gearboxes are made. And yes, you can program PU L/XL motors to move 90°.

Jeeps have live axle suspension, so implementing drive, steering and suspension would be actually easier.

PU M motor (white one) has no position sensor, so it can't know it's position.

Congratulations to everyone and of course kudos to the winners! Thanks to Jim for another lovely contest and for giving us challenges and something to build Can't wait for the next one!

Or just have no diff, much easier.

Use the 6L suspension arms from the Senna creator build. They are thinner and will give more space to the CVs

Amazing attention to details, and I'm really impressed with the door mechanism and the wheel design. And the removal of self-supporting body and replaycing the chassis with a motorized one... Just brilliant! Subscribed and (re)featured!

Did you check the batteries are still fine? You can see if the IR LED is blinking via a phone camera, it should look purple.

If you bent an axle, it would be a cause for increased friction and thereby skipping gears.

It makes sense, since the red one has the highest gear ratio, the drive axle has to do more turns, resulting in more friction. Also, the bigger the gears the less force acts on them at the sae torque level, reducing friction.

Regarding the whole too many cars topic. Everyone votes with their wallets and it's normal for business to focus on what sells. So... Just buy more other things than cars and we will get more of such!

Thank you for the praise, Igor. Indeed sometimes I wish LEGO would keep the large CV geometry, but in smaller package which would still fit in the standard 8 mm grid. Regarding the model itself, I think it might actually see some action on the next year's BuWizz gathering!

They are inside the hub, see here for more details:

Externally it has same dimensions, only difference is that the balls are fixed and that it can only accpet the large CV joint. Internally it actually features a bearing with 3 rollers.

This is a small AWD Trophy truck that I was able to build thanks to the new components in the Skyline, specifically the 4L links and the 4L CVs: The biggest challenge with this model was in finding a solution for the FWD which would allow for high suspension travel and a good steering angle while being limited to 25 degrees of movement of the CV joints. I decided to bring the front suspension arms closer together, therebye creating the following suspension geometry which forces the front wheels to move in an arc: This in turn has several advantages: Reduces the angle the CV joint has to carry the power on the outboard side Allows for a higher steering angle Increaces the ground clearance on the bottom As such the front suspension is supported by 2 soft shock absorbers. Notice how the L liftarms hold the suspension together, supported by a white bar that goes through the cross hole: The rear suspension uses the normal equal length parallel arm design and it's supported by a combination of a hard and soft shock absorber which are placed at an angle to simulate a progressive setup: The front axle also uses double steering rack simillar to 42160 with 4 steering links to keep the front steering system as accurate, robust and stiff as possible (Please note, there are no 4L link yet available in LDD): Originally the driveline used a 12:20 gearing from the motor to the main shaft and than the 20:28 to the wheels. I used a couple of bevel 20 tooth gears so that a 5x11 panel could fit under them to protect the gears. But during video shoot, the solution proved to be a weak point, so I redesigned the driveline to use a pair of 16 tooth gears and a 12:28 diff combo which gives me the same gear ratio, yet with added strength: The only weakpoint left were the small CV recepticles: But after reducing the current limtiters from 2 to 1.5 A, I have yet to suffer a failure, even when suddenly changing directions. You can see the model in action here: I have to say this is a really compact, fun and almost indestructible model and I'm really happy how it turned out. Now if only LEGO could come up with a 4L version of the large CV joints...

Well done, good progress. Will you use the new 3L suspension arms to hold the hubs?

Yes. There are 2 versions, the one with open crossholes is an older one from a harder plastic. The new one with close crossholes is much softer and fails quickly under load. Regarding CVs, I recommend using wheel hubs and CVs from 42160.

You can use a frictionless 8 tooth gear to spin and move axle at once.

Quickly looking at the instructions, it shuld be possible to center the battery box and add another motor. This would allow faster gearing ratio and perhaps ability to control 2 functions at once.

Well done, it was just a matter of time when DeLoreans started popping out