Gen 4 Suspension - Help with Wind and Body side to side

You are not going to like this but unless you are actually using that roof rack because of a genuine lack of space in the car removing it is going to be the cheapest way to improve the car's stability. If you are using it a lot especially with heavier or bulky items up top then slowing down and driving to the comfort zone of the car is again going to be the cheapest option. My gen3 is running heavy duty dampers and has one of the lowest side profiles in the community this side of a bikini soft top and even it is horrible in side winds not so much for lurching around on the suspension but just being pushed off course.

Soeley wrote: Maybe for you the answer could be to Lower the suspension?

Mostly out of curiosity but for all they say they do lowered springs none of the country specific sites list any kinds of Jimny?

The main reason why a lift is likely to improve stability is because it is going to use either stiffer springs and or dampers with higher compression and rebound or put another way less compliant suspension which is a band aid for road stability but actively bad for cross country travel. The reason the standard suspension moves about so much is that it is a compromise between road and cross country with a definite bias towards cross country. Fitting a lift is only really necessary to make room for bigger tyres which are the only way to gain more clearance under the axles. A proper lift kit should really have longer springs instead of just stiffer ones that way it maintains articulation and still gives the clearance for the wheels but it won't help with road stability. I think I'm starting to ramble a bit but here is my last point. A Jimny is a narrow vehicle, fitting and using a roof rack raises the centre of gravity on an already high centre of gravity vehicle, setting too and increasing the centre of gravity even more with a lift kit, even a stiff one, is optimism incarnate. What you are really trying to do is improve the roll centre of the car and the only way to do that is to increase the distance between the spring seats on the axles and chassis and the centre line of the car. Everything else is just masking the symptoms.