slide those planks forward. You need more weight over the steer.

1.2 from the head lights is still good.

When people weigh their vehicles is they weigh them all up. You may find that your rear axle weight is over or very close to it. Hopefully your manual has recommended axle weights.

Dont rule out your tyres either. Check your tyre maximum weights a soft side wall over loaded or close to it will make it handle like a pig. And also your pressures.

neil