Jerico Performance Products' Jerry Hemmingson may have first begun reworking Ford's Top Loader transmission into his own unique design in order reduce his timeslips on the dragstrip, but the quality of the transmission has made it a winner in many different types of racing.
Jerico's two- and four-speed Top Loader transmissions are extremely popular among road racers because of their light weight, extremely low rotating mass, and durability. But that has also made these transmissions highly prized among asphalt oval track racers with open transmission rules. Besides the already mentioned strengths, these transmissions also offer a wide variety of gearing options to help you find the right match for your track, and the simple design means repairs and rebuilds are surprisingly easy.
We recently stopped by the shop of Jim Cook Racing Transmissions while Cook was beginning the process of inspecting a Jerico two-speed transmission that an asphalt Super Late Model team had purchased used from another team. Wisely, the new owner of the transmission didn't want to risk a failure that kept them from finishing a race, so they had asked Cook to go through the unit and make sure everything was up to spec before bolting it into the race car.
It turned out to be a wise move by the race team. The transmission looked good at first glance, but Cook did find a few issues that he was able to correct quickly and easily before they could become big expensive problems on the racetrack. Cook also gave us some invaluable advice and things to look out for when rebuilding your own Jerico transmission.