It’s perfectly normal for a toddler to crave the security that comes from a pacifier. There’s no confirmed reason to rush him — and there will most likely be many tears involved with weaning him from it. But, in addition to social reasons, here’s some additional motivation: When a toddler has a pacifier in his mouth, he’s less likely to verbally communicate his needs, which can lead to more (unnecessary!) temper tantrums.
The best way to wean your toddler off a pacifier is to take it slowly. Start by keeping one pacifier in his crib or bed and one in his car seat, where they will each stay. And don’t make him feel that leaving the pacifier in those places is punishment; just tell him those are each pacifier’s homes. After a few weeks, remove the pacifier from the car seat, but let him keep the one in his bed — at least for a while. Eventually he may decide on his own that he no longer needs it.