While in the process of building a new engine for the Road Runner, it was deemed necessary to upgrade from my Jerico DR4. I bought that transmission new in 1999. The only thing I ever had to do to it was replace a first gear on the main shaft. I cracked a tooth, as a result of dead hooking the car. While it served me well, I know it had its limitations, so I sold the trans for what I paid for it, back in 1999, and ordered a Liberty Equalizer, Clutchless 4 Speed. Why a 4 speed, and not a 5 speed? My cars chassis is legal to run Super Stock, if I ever wish to go that route. I’d just have to change out the fiberglass body panels with steel, and it would pass. I don’t want to buy a different transmission in the future.