Grenadier unstable steering offroad.

[Kalthunayan]

Hey guys, during my last overlanding trip my grenadier was very unstable offroad, the car seems to shift left and right in the dunes which makes the car difficult to control.

Changes made to the car: 285 70 17 tires, Eibach lift kit 1.7” Front 1.2” Back. About 240kg worth of weight (excluding passengers.)
Anyone has any idea of why this issue has occurred? The only change to my previous trip was a 120liter water tank.

 

[TheDocAUS]

Do you have front and rear diff lockers? Did you engage either one? Was the car placed into offroad mode?

Where is the 120 litre water tank located? It may affect centre of gravity.

Did you have ESC OFF engaged?

Table complied by @Michael H.

 

[mcdoogs]

Was that big water tank on the roof?