The TR3 B was a short production in response to the concerns of the dealers, that enthusiast might not like the new-to-market TR4. Although the TR3 B was not the official name, that is how it is differentiated within the TR community. The TR3 B was in production in parallel with the new TR4, which is why there were two different variants; the TSF with the same powertrain from the TR3 A and the TCF that shared the mechanics with the TR4; meaning a 2.2L inline-four and the overdrive option. Production lasted from 1962 to 1963 when it was replaced by the TR4.