This week on Car Talk, Tom and Ray say they've never met a noise they didn't like but that's before they encountered the odd thumping sound Janet's truck is making. And then there's the sound of their dear mom, Elizabeth, calling to celebrate Mother's Day by complaining about her sons' poor gift selections. Elsewhere, from the Questionable Ideas department, Mark wants to use his Ford Tempo to tow a trailer from Dallas to Pennsylvania; Jonathan is considering using a turkey baster to drain his car's power-steering fluid; and Missy's 18-year-old son wants to buy an Audi Quattro to keep on campus at Boston University. All this, plus the best college application essay ever, and lots more, this week on Car Talk.