Suspension noise? Are you sure you are not talking about the air compressor sound that goes "pshhhhh" when you brake ? That I disabled because the 6R sold in NA doesn't have air brakes. It has hydraulic brakes.
No, I mean the sound of the cab rattling when you go over bumps and such. It's on the original Giants John deere. Again, not a slight on the mod it just adds immersion to the in-cab driving. I've been looking for a 6r medium with US options since the game came out. Great mod.