Transmission arrangement for a vehicle, wherein the transmission arrangement has an axial direction and a radial direction and comprising: a rotatable gear wheel having radially outer teeth configured for meshing engagement with a further gear member, and axially protruding engagement members, a first annular transmission member arranged next to the rotatable gear wheel and having corresponding axially protruding engagement members in torque transmission engagement with the engagement members of the rotatable gear wheel, and an annular groove provided ir a radially facing surface, a second annular transmission member being in torque transmission engagement with the first annular transmission member and having an annular groove provided in a radially facing surface and arranged radially overlapping with the annular groove of the first annular transmission member such that said annular grooves (16, 18) jointly define an annular space, and a locking member located within said annular space for axial locking of the first and second annular transmission members (14, 17) relative to each other, wherein an opening or recess is provided in the first or second annular transmission member (14, 17) for enabling access to said annular space and for enabling insertion of the locking member after the annular grooves (16, 18) of the first and second annular transmission member (14, 17) have been positioned facing each other, wherein the annular groove of the first annular transmission member is provided in a radially outward facing surface and the annular groove of the second annular transmission member is provided in a radially inward facing surface, or the annular groove of the first annular transmission member is provided in a radially inward facing surface and the annular groove of the second annular transmission member is provided in a radially outward facing surface. a rotatable gear wheel having radially outer teeth configured for meshing engagement with a further gear member, and axially protruding engagement members, a first annular transmission member arranged next to the rotatable gear wheel and having corresponding axially protruding engagement members in torque transmission engagement with the engagement members of the rotatable gear wheel, and an annular groove provided ir a radially facing surface, a second annular transmission member being in torque transmission engagement with the first annular transmission member and having an annular groove provided in a radially facing surface and arranged radially overlapping with the annular groove of the first annular transmission member such that said annular grooves (16, 18) jointly define an annular space, and a locking member located within said annular space for axial locking of the first and second annular transmission members (14, 17) relative to each other, wherein an opening or recess is provided in the first or second annular transmission member (14, 17) for enabling access to said annular space and for enabling insertion of the locking member after the annular grooves (16, 18) of the first and second annular transmission member (14, 17) have been positioned facing each other, wherein the annular groove of the first annular transmission member is provided in a radially outward facing surface and the annular groove of the second annular transmission member is provided in a radially inward facing surface, or the annular groove of the first annular transmission member is provided in a radially inward facing surface and the annular groove of the second annular transmission member is provided in a radially outward facing surface.