I have heard this being a problem with some Tacomas. Toyota must have gotten into a bad batch of springs. I would recommend calling ARB and ordering a set of OME springs, stock hieght if that's what you want) for the rear of your truck. I'm sure they sell a version for your year/model. That should solve all of your problems.

Otherwise, a call to Alcan springs , could also net you a super high quality set of springs.

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