A quick question for the 4runner hivemind:

My 1999 4runner has 275,000 miles and I’ve just re-done pretty much all of the front assembly. I’m noticing now in certain situations on the highway I get an extreme rocking side to side. It doesn’t happen all the time, just when I’m on a weird bit of paving or I hit a bump just right. But the rocking is dramatic when it happens. My guess is that I need new coils and shocks. Maybe having the front all tight now puts more pressure on the old suspension? Is there anything else I should be considering as the cause? I never noticed it before the front work, but honestly it’s possible that those are still original coils and shocks.

Thanks for your advice and comments.