In the March '77 issue of HOT ROD, the Hurst/Schiefer Clutch Doctor, Earl Richey, explained the ins and outs of clutch overhaul and rebuilding. But Richey is a man of many talents, and this month he ...

Your engine rotates so your tires can rotate, but after your engine rotation goes through the transmission, transfer case, and driveshafts it has to make a 90-degree turn to continue out your ...

Few things are more annoying than seal leaks of any kind. They stain the driveway and lose all-important lubrication at the same time. Even more frustrating is replacing a seal in a differential that ...

For 11 years now, German company Pinion's sealed mid-mount gearbox has offered a tougher alternative to derailleurs. It's now been combined with a motor, resulting in a two-in-one ebike module called ...

The first things you'll need to set up a rearend are the basic rebuild parts, such as new bearings, seals, shims, bolts, a crush sleeve and a nut. We used Reider Racing's "full" installation kit for ...

Right-angle gearing often requires engineers to compromise between torque capacity and mechanical efficiency. Hypoid gearing ...

This article was updated Feb. 28, 2023. It was originally published March 1, 2000. Planetary gears can supply high levels of torque and high-speed reduction. They are also relatively compact compared ...