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Discussion Starter #1
So I've noticed how sensitive the Crosstrek is to added weight in the rear. I've done a 600 mile trip with 4 people and luggage and recently hauled about 320 LBS of Quickcrete in the back. Both times the car felt a little squirely and tended to want to oversteer. Gentle inputs were definitely required. What would be the best least expensive upgrade or fix? Adding a few extra pounds of air in the rear tires which helped but should I be looking at sway bar upgrades? Ideas?

Thanks,
Tom
 

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With those loads in there are the tires braking loose or are you just getting lots of rear end sway? I would expect a lot of sway from the rear end, not actual over steer. If it's a lot of rear end movement/sway potentially consider a heavier spring if you carry loads often. A sway bar may also help to keep it a bit flatter. If you're actually getting over steer a rear sway bar will only make it worse.
 

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Discussion Starter #3
Tires are not actually breaking loose. (Not on dry pavement with AWD and only 148 hp anyway.) ;D More like a sway. When changing directions the rear feels like it wants to continue coming around. Gentle counter steer and corrections are required to keep it on track. I don't carry a lot of weight normally. In fact I drive alone most of the time. Empty, the car's ride feels a little stiff. But it does feel a little unsettling when loaded. To reduce under steer I thought you would increase rear sway bar stiffness so to reduce oversteer you would reduce front sway bar stiffness? Is there a progressive rear shock/ spring set up that is better ?
 

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If you're just having load issues it's not an over/under steer issue. The suspension and tires are too soft for the weight you're carrying causing the rear end to roll. There are not a whole lot of spring options out there but King usually offers a stiffer stock ride height springs for Subaru applications.

Over and under steer involves tires loosing traction, not just body roll. If you have an over steer issue (i.e. the rear end is loosing traction and stepping out) the last thing you want to do is make the rear end stiffer. (At least on a car on pavement) When you talk about dirt, or actually sliding that's a whole different story. In reality having over steer on the street is pretty rare (not counting power over steer which obviously happens with high power rwd cars).
 

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Heheh, try it with four people, a full load of gear in the back, two bikes on the roof and two on a hitch rack. Wanna know what unpredictable is? I'll tell you all about it :eek:
 
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