A multistage transmission with eight forward and one reverse gear, including an input and output shafts, planetary gearsets, gear stages, shift elements and shafts. The input shaft couples the carrier of gearset (P1) and, via clutch (15), can couple shaft (5) that couples the sun gear of gearset (P3) and, via clutch (58), can couple shaft (8) connected to the ring gear of gearset (P2). The ring gear of gearset (P1) couples shaft (6) connected to the sun gear of gearset (P2). Shaft (3) couples the sun and ring gears of respective gearsets (P1, P3) and can couple, via brake (03), the housing. The carrier of gearset (P2) couples shaft (4) gear stage (S1) which couples the output shaft. The carrier of gearset (P3) couples shaft (7) gear stage (S2) which couples the output shaft. Clutch (56) can couple shafts (5, 6).