It is no accident, then, that in New Testament theologians’ recent and current treatments of justification, you would be hard-pressed to find any discussion of an imputation of Christ’s righteousness. (I have in mind treatments by Mark Seifrid, Tom Wright, James Dunn, Chris Beker, and John Reumann, among others.) The notion is passe, neither because of Roman Catholic influence nor because of theological liberalism, but because of fidelity to the relevant biblical texts. Thus New Testament theologians are now disposed to talk about the righteousness of God in terms of his salvific activity in a covenantal framework, not in terms of an imputation of Christ’s righteousness in a bookkeeping framework.

Source: Gundry: Why I Didn’t Endorse The Gospel of Jesus Christ