Shaking in the cup

Hello friends. My car is a 301 Peugeot. When I shift from 1st to 2nd gear at low speeds, the coupe shakes. This only happens when I shift from 1st to 2nd gear and at low speeds on inclines with load. If I don't release the gas at low speeds and give it a strong push, the shaking doesn't stop. Two of the axles were replaced with zero. The transmission mount was replaced, but the problem persists. Has anyone experienced the same problem and found a solution? Thanks.

Did you check the engine mount, brother? It could be that too.

The one on it was torn. I had it replaced by an aftermarket one, but it could also be from that one. I will bring the original one and put it on and see. Thank you.