Is it true if you lower you ride and dont use TRD springs it will void your warranty?

 

void is NOT the word to use. HONOR your warranty for your suspension they will NOT if you use non-TRD springs, something goes wrong, and if service can trace the fault to the non-TRD springs.

Are you sure you searched for this topic before you posted....?

 

^ I'm not sure if that's the best wording for it either. At least the "non-TRD" part.

Here's a scenario that should explain it.

If you install springs on your car (Hotchkis for example), it will lower it. But you may still be using your OEM shocks/struts. If your OEM shocks or struts blow out, they could likely determine it was the non-OEM springs that were the direct cause of the problem. So they would not replace your shocks/struts under warranty.

There is a thread in the Maintenance and Car Care forum stickied for this. I suggest you read it.