It is in the QRH of both the 737-Classic (300-500) and the 757.
If the gearhandl will not move after T7O there is some procedure to follow on the 737, which can lead to return to a suitable airfield (if I remember it correctly). On the 75 however it is just: press the button, move the handle, procede normally.
This difference is I beleve due to the 737 uses squat switch in the R-H main gear for air/ground sensing, but the 757 uses bogie tilt; when the gear enters the wheel well it will tilt and the aircraft goes into airmode