OEM style four speeds properly rebuilt don't make noise. Noisy transmissions mean something is not correct with the gears meshing together. Size matters.
I had a iron then aluminum passon 4 speeds in the hot rod - both were quiet and shifted fantastic. The hemi od 4sp was noisy in 4th but it did stop after a few gear oil changes and use
The A12 car has the 5sp and it wont go into 5th at wide open 120 mph so the hellcat starts to pull away. Getting it fixed? Well...oh boy let's see how that goes when it's time