Take a photo of the part, or just the general area, and describe what it’s doing in your own words. “Clunks over bumps” works fine. You get back the name of the part, the likely causes, the steps to narrow it down, and the socket size and torque spec you’ll need.
If you add a vehicle by VIN, the answers are about your engine and your platform instead of a generic write-up for the whole model line, and the reference links are marked by how closely they match what you actually drive. You also get any open recalls for that VIN, tracked by status so you can see what’s still outstanding, and the maintenance schedule for the mileage you’re actually at.
Every answer tells you whether this is a job to do yourself, a toss-up, or one for a shop, and it gives you a rough shop price and how long it should take, so you can decide before the wheel is off. After the answer comes up, PocketFix also searches real repair guides to find whatever else has to come off first that the steps didn’t mention.
And when your hands are dirty and the phone is sitting on the fender, you can ask a follow-up out loud and it answers out loud, one step at a time, so you don’t have to touch anything.