Transmission

An automotive transmission, said transmission comprising:

• i. a housing;
• ii. supported within said housing,
• an input shaft and an output shaft, said input shaft driven by a power source;
• iii. slidably mounted on said input shaft, a front drive dog ring;
• iv. slidably mounted on said output shaft, a rear drive dog ring;
• v. a first gear housing, and contained in said first gear housing, a planetary gear housing and carrier, a planetary gear set comprising a central sun gear rotatably mounted on said input shaft, and at least three planet gears surrounding the sun gear, said planetary gear housing and carrier being covered by a circumferential first ring gear having internal surface gears that mesh with the planet gears;
• vi. said planetary gear set being activated by a first hydraulically driven control cylinder that applies a first band on a low gear drum that incorporates the planetary ring gear providing low gear;
• vii. said planetary gear set being activated by a second hydraulically driven control valve and cylinder that applies a second band on a reverse gear drum that incorporates the planetary carrier providing reverse gear;
• viii. said front dog ring engages the planetary sun gear to drive said planetary gear set when reverse or low is selected;
• said front dog ring is driven by said input shaft;
• said front ring dog disengages when direct drive is selected bypassing said planetary gear set;
• ix. said rear dog ring is surmounted on said output shaft and further drives said output shaft;
• said rear dog ring is activated by a shift lever selecting low gear position, reverse gear position, neutral position and direct drive position;
• when said direct drive position is selected said rear dog ring is disengaged from said planetary gear set;
• x. a valve rod having a near end;
• xi. a shift rod, said shift rod comprised of an inner shaft having a middle portion and an outer shell, said shift rod having a distal end and a near end, said valve rod and shift rod being fixedly attached to each other at the respective near ends;
• xii. said valve rod having predetermined nodules along an outside surface thereof;
• xiii. said shift rod outer shell rod being spring biased at the near end;
• xiv. said shift rod outer shell having a first shift fork assembly mounted at the distal end, the shift fork of said first shift fork assembly being engaged to the front dog ring;
• xv. said shift rod inner shaft having mounted near the middle portion, a second shift fork assembly, the shift fork of said second shift fork assembly being engaged to the rear dog ring;
• said second shift fork being slidably mounted on said outer shift rod;
• xvi. a first poppet valve activated by the positioning of the valve rod nodules for controlling the flow of hydraulic fluid to the circumferential first band cylinder, and a second poppet valve for controlling the flow of hydraulic fluid to the circumferential second band.