The classical summation and transformation theorems for very well-poised hypergeometric functions, namely, 5 F 4 (1) summation, Dougall's 7 F 6 (1) summation, Whipple's 7 F 6 (1) to 4 F 3 (1) transformation and Bailey's 9 F 8 (1) to 9 F 8 (1) transformation are extended. These extensions are derived by applying the well-known Bailey's transform method along with the classical very well-poised summation and transformation theorems for very well-poised hypergeometric functions and the Rakha and Rathie's extension of the Saalschütz's theorem. To show importance and applications of the discovered extensions, a number of special cases are pointed out, which leads not only to the extensions of other classical theorems for very well-poised and well-poised hypergeometric functions but also generate new hypergeometric summations and transformations.