Our blogs
Explore expert insights on semi-truck transmissions, clutch setups, custom gearing, racing applications, and over-the-road performance from Jimmy’s Custom Speed Shop.
Find out how to choose a heavy-duty semi-truck transmission for over-the-road hauling by comparing gearing, operating conditions.
Learn what to compare when choosing a custom semi-truck racing transmission, from gear ratios and clutch compatibility to application-specific components.
Learn how to recognize transmission warning signs, understand common causes of drivetrain problems, and determine when a semi-truck transmission may need rebuilding.
Discover how transmission ratios, tire sizes, differential gearing, and shift RPM work together to improve semi-truck racing performance.
Need help choosing the right setup?
Our team is here to help you build a transmission that wins.