Self orbit equivalences on the Anosov flows on Dehn surgeries on the figure-eight knot

Let $M_k$ ($k\in \mathbb{Z}$ and $\mathrm{\mid }k\mathrm{\mid }>4$) be the $3$-manifold obtained by doing $k$ Dehn surgery on the figure-eight knot, and $X_t$ be the canonical Anosov flow on $M_k$ that is constructed by Goodman. The main result of this article is that if $\mathrm{\mid }k\mathrm{\mid }\gg 0$, then $Mod(M_k)\cong {\mathbb{Z}}_2\oplus {\mathbb{Z}}_2$ and every element of the mapping class group of $M_k$ can be represented by a self orbit equivalence of $X_t$.