General American is rhotic, that is, the /r/ is pronounced after vowels. See START, NORTH, FORCE and LETTER in the vowel chart. Listen to the examples of General American such as park, car, war, normal, yours, either, faster.

This means that there is no centering diphthong in near /nɪr/, square //skwɛːr/ or cure /kjʊr/. Compare this with RP /nɪə/, /skweə/ and /pjʊə/. Listen to there, where.

The phoneme /t/ has a flap pronunciation [ɾ] between vowels. So writer has the following pronunciation: /ˈrɑɪɾɚ/.

The consonants /n, d and j/ before -u and -ew , RP are followed by /j/. Let's see a comparison:

Example	Am.E	RP	Example	Am.E	RP
tune	tuːn	tjuːn	duke	duːk	djuːk
new	nuː	njuː	dune	duːn	djuːn