I havent had any problems since ive figure out my set up which is #2 all around 60wt fr and 35wt rear AE oils and I beat my truck up pretty good. You need to change the oil frequently, I do about every 2-3 quarts. I love the stock shocks, I bought everything to rebuild them but never had to yet. These are the most durable shocks "internals wise" I have ever seen. I am happy with the stock springs but I do wish Cen would make at least options for us.