[Izzy]

In my experience - un locked axels are great for around the house and at a meet where your on nearly flat surfaces.

Once you get into dirt, the crushed rubber or out in the yard (no matter how nicely mown or manicured) the trucks jsut get hung up. High sideed by one tire.

Some people try going for super articulation. It is rather funny looking to see a scale looking truck with what would calculate as 18" of wheel travel.

Others resort to locking the axels. (Yes both tires spin at same speed). Some just the rear most axel. Some the front driver only. Some both sets of drivers and still others go for full 4 wheel drive.

Now - There are some scratch builds on here that weigh enough that they don't need all wheel drive. But. That's pretty hard to come by.

I built a dump and was invited over to PFB place - it hardly could move around his play area - loose dirt. IT had plenty of weight and those nice off road tires. But it just wanted to dig a whole - even though is was a 6x6 with floats on the front.

A buddy of mine had been running a 6x6 but no weight - his performed better than mine.

Next time I wen't I locked up all the axels and dropped all the BB's out of the tires. WOW what a difference. It floated right over top of everything.

But

When you drove it in the kitchen it had some issues. IT put a lot of stress on the steering wheels - having to try and pull the front end around even though thte average tire speed of the fornt was no different than the back - therefore it wanted to push through the corners.

- my suggestions -
So if it is an offroad truck (dirt grass outdoors) go for the full locked scenario.
If it is a a show truck shelf queen - never sees dirt - go for the all standard open diffs.
If it is somewhere in between - try locking up some and leaving others loose. Try adding a powered front - but not locked - helps in steering - especialy long trucks.



Izzy