The engine still start and be able to do backward.
Yes, it make some chunking noise.
We shifting it slow with the black lever, the gear lever.
We always did that or try to did that. In a few incidents when we bring
it down to idle and it stalls with the gear stuck at forward or
backward. When it happens then we will not be able to start the engine
but to move the black lever back and forth to release it from gears.
When that happened that day, it was very slow even with the red lever
forward all the way and at the end it was not even moving with gas.
There is not much slop in the linkage.

Thanks for your help !!!