what didn;t llewelyn throw away the tracker

He didn’t throw away the tracker because he didn’t realize it was there right away; he thought the cash was just hidden in the bag, and only later discovered the device.

In No Country for Old Men , the tracker is the reason Chigurh can keep closing in on him, so once Llewelyn keeps the money, the danger follows him anyway.

What that means

• He removed the hollowed-out bills, but the transponder stayed with the money.

• He was focused on getting away fast, not doing a full forensic check of the cash.

• The story’s point is that taking the money itself puts him in the path of the violence.

Simple read

So the short answer is: he didn’t throw it away because he missed it at first, and by the time he understood the risk, the tracker had already done its job.

TL;DR: Llewelyn kept the money, didn’t spot the tracker immediately, and that mistake helped seal his fate.