YT-34 - Prototype, three built.
T-34A - US Air Force trainer, ( Production - 450 units) Used as a primary trainer until replacement by the Cessna T-37 around 1960.
T-34B - US Navy trainer, ( Production - 423 units ) Used as a primary trainer until early 1970s when it was replaced by the T-34C. Many T-34B's were flown by pilots assigned to the Navy Recruiting Command until the mid-1990s.
T-34A /(B45) - Export models, (total world wide production - 475 units).
YT-34C - Two T-34B's fitted with turboprop engines, and were used as T-34C prototypes.
T-34C Turbo-Mentor, (Production - 280 units) - US Navy primary trainer, two-seat primary trainer, fitted with a turboprop engine.
T-34C-1 Export Turbo Mentor, (Production 75 units) - Equipped with hardpoints for training or light attack, able to carry 1,200 lb (540 kg) of weapons on four underwing pylons. The armament could include flares, incendiary bombs, rocket or gun pods and antitank missiles. Widely exported.
Turbo-Mentor 34C - Civilian version