Transmission takes time to shift and makes a lot of noise?

On an earlier thread, with your guide I was able to pinpoint timing issues on my car and got it fixed. Now, the transmission takes time to shift and makes a lot of noise (normal noise before gear change though) and it seem not to shift to overdrive, I am still trying to research if my car does not have overdrive though. As a result of all this I feel the power of the car is not optimal.

Note; before the timing work was done, the car was scanned/diagnosed and DTC "P0352 ignition Coil B Primary/Secondary Circuit" Was read, could this be the reason the transmission is not optimal?
I just noticed now that when I engage the reverse gear (maybe it's because the car is warmed-up/hot, the car vibrates really bad.

I performed ignition coil test few minutes ago, disconnecting the coil wire connector one after the other, and discovered that the ignition coil B had same effect on the engine as much as the other 3, therefore, I feel the coil B, might just be as good as the other other 3.

I performed ignition coil test few minutes ago, disconnecting the coil wire connector one after the other, and discovered that the ignition coil B had same effect on the engine as much as the other 3, therefore, I feel the coil B, might just be as good as the other 3. Maybe after the timing work the coil started working again, because I haven't scanned the car after the repair.