A system for protecting an engine and a manual gearbox consisting of: 1) a Basis, 2) metal feelers (18, 19, 20, 21, 28, 29) with springs (14, 15, 16, 17, 32, 33) incorporating small vertical protrusions (22, 23, 24, 25, 30, 31) in a ratio of 1:1. The springs (14, 15, 16, 17, 32, 33) are compressed as the feelers (18, 19, 20, 21, 28, 29) moves backward from the gear lever of the manual gearbox. 3) On the basis exist at least 2 other bases (26, 27, 40, 41) within which slides the feelers (18, 19, 20, 21, 28, 29) while are nesting the springs (14, 15, 16, 17, 32,33). The small vertical protrusions (22, 23, 24, 25, 30, 31) are part of the feelers in a ratio of 1:1. These small vertical protrusions (22, 23, 24, 25, 30, 31) are used to stop with the help of valves, the backward movement of the feelers (18, 19, 20, 21, 28, 29) from the gear lever. 4) Electromagnetic or pneumatic valves (2, 5, 8, 11, 34, 35) with bolts (3, 6, 9, 12, 36, 37), in a ratio 1:1. If these bolts (3, 6, 9, 12, 36, 37) have been moved forward then they have been inserted behind the back side of the small vertical protrusions (22, 23, 24, 25, 30, 31) and they can stop the backward movement of the feeters (18, 19, 20, 21, 28, 29) from the gear lever. The final result is to stop the gear lever to insert to any unwished gearbox ratio due to a wrong driver's activity. and whereby the number of the metal feelers, the number of the small vertical protrusions, the number of the springs which are behind of the metal feelers and the number of the valves are the same with the number of the gearbox ratios. Also the number of the bases within which slides the feelers while are nesting the springs can be between 2 and the number of the gearbox ratios. 1) a Basis, 2) metal feelers (18, 19, 20, 21, 28, 29) with springs (14, 15, 16, 17, 32, 33) incorporating small vertical protrusions (22, 23, 24, 25, 30, 31) in a ratio of 1:1. The springs (14, 15, 16, 17, 32, 33) are compressed as the feelers (18, 19, 20, 21, 28, 29) moves backward from the gear lever of the manual gearbox. 3) On the basis exist at least 2 other bases (26, 27, 40, 41) within which slides the feelers (18, 19, 20, 21, 28, 29) while are nesting the springs (14, 15, 16, 17, 32,33). The small vertical protrusions (22, 23, 24, 25, 30, 31) are part of the feelers in a ratio of 1:1. These small vertical protrusions (22, 23, 24, 25, 30, 31) are used to stop with the help of valves, the backward movement of the feelers (18, 19, 20, 21, 28, 29) from the gear lever. 4) Electromagnetic or pneumatic valves (2, 5, 8, 11, 34, 35) with bolts (3, 6, 9, 12, 36, 37), in a ratio 1:1. If these bolts (3, 6, 9, 12, 36, 37) have been moved forward then they have been inserted behind the back side of the small vertical protrusions (22, 23, 24, 25, 30, 31) and they can stop the backward movement of the feeters (18, 19, 20, 21, 28, 29) from the gear lever. The final result is to stop the gear lever to insert to any unwished gearbox ratio due to a wrong driver's activity. and whereby the number of the metal feelers, the number of the small vertical protrusions, the number of the springs which are behind of the metal feelers and the number of the valves are the same with the number of the gearbox ratios. Also the number of the bases within which slides the feelers while are nesting the springs can be between 2 and the number of the gearbox ratios.