Americas Death wobble at 90-100km/h

[INEOS OG]

Is the Carraro Axle designed for the Grenadier or something from the stock?

AWo

I don't want to be a buzzkill, but the axle in your vehicle doesn't know that it wasn't designed to be in your vehicle.

The laws of physics are finite and absolute. See Newton's first three laws for a primer.

I've been replacing shit axles with 3/4 and 1 ton Dana units in everything from Suzuki Samari's to F series trucks for decades and most do not use a steering stabilizer.

 

[AWo]

It is not about the axle knowing where it is fitted to (By the way, I strongly believe axles have brains and know exactly in which car they are!!!)

It is about the caster, which is an important stabilizing parameter. If the axle is normally used with larger tires (as Cararro makes axles for tractors) the caster would be greater due to the larger diameter of the tire. If smaller tires are mounted then, the caster gets smaller (wasn't the small caster discused here somewhere, was it, as well as weak self-centering forces?), as the kingpin ground intersection is different then

AWo

 

[Dokatd]

I don't want to be a buzzkill, but the axle in your vehicle doesn't know that it wasn't designed to be in your vehicle.

The laws of physics are finite and absolute. See Newton's first three laws for a primer.

I've been replacing shit axles with 3/4 and 1 ton Dana units in everything from Suzuki Samari's to F series trucks for decades and most do not use a steering stabilizer.View attachment 7924172

That pic shows a radius arm style suspension. That's why it resists DW. Throw on a short arm 4-link and you MIGHT be in trouble. Longer arm 4-links are a bit less troublesome seemingly.

Your experience is seemingly with more aggressive trucks as is mine. I agree that stabilizers shouldn't be needed. But some trucks just need them straight from the factory. The Grenadier is one of those trucks.

 

[255/85]

It is not about the axle knowing where it is fitted to (By the way, I strongly believe axles have brains and know exactly in which car they are!!!)

It is about the caster, which is an important stabilizing parameter. If the axle is normally used with larger tires (as Cararro makes axles for tractors) the caster would be greater due to the larger diameter of the tire. If smaller tires are mounted then, the caster gets smaller (wasn't the small caster discused here somewhere, was it, as well as weak self-centering forces?), as the kingpin ground intersection is different then

AWo

I don't think that is correct. The caster angle doesn't change with tire size but larger tires do extend the distance from the point where the axle center line crosses the kingpin axis down to where the tire touches the ground. Since the rear tires on a 4x4 would generally match the front there would be no change in the caster. Conversely, if you increase the front tire size only then, yes, that would increase positive caster or reduce negative caster with a smaller tire.

As to Carraro's axle offerings...

They do have several front/rear axles listed in their catalogues that offer varyied weight-carrying capacity. It would be interesting to know how much input Ineos had into the assembly specifics beyond the basic width. Example: The left side lower control arm attachment point is cast in place so I doubt Ineos would be considerd a large enough purchaser to convince Carraro to re-design the front differential casting.