a wall 42 of the recess 26 and a wall 44 which forms one end of the adjustable portion 14 the wall 44 closes the channels 20 22 of the adjustable portion 14 the spring 40 urges the adjustable portion 14 outwardly from the opening 26 to prevent the adjustable portion 14 from being pushed completely from the opening 26 a lock member 46 is positioned in the opening 28 the lock member 46 has a button or top shelf portion 48 and a bifurcated toothed section 50 depending therefrom and lower rectangular portions 52 depending from each of the toothed sections 50 the lower rectangular portions 52 have plain or smooth sidewalls which in the position shown in fig1 and 2 are disposed in the channels 20 and 22 adjacent the side surfaces 24 since each portion 52 has plain surfaces the adjustable portion 14 is movable into the opening 26 the spring 40 pushes or urges the adjustable portion 14 against the rectangular portions 52 to prevent removal from the body core 16 the body core 16 has a socket opening 54 in which a ball and socket arrangement 56 is disposed the ball and socket 56 is secured with a transmission control lever 58 which in turn is pivotally disposed on a conventional automatic transmission 60 to operate the manual hydraulic control valve not shown as is well known the transmission input controls such as the lever 58 are pivotally disposed to operate on a conventional detent plate which in turn moves the selector control valve linearly the lever 58 is movable between a park position 34 p 34 and a low position 34 l 34 to correspond to the movement of the operator lever 18 as shown in fig1 and 2 the.