When a vehicle is driven regularly, rarely is it in one spot long enough to detect more than an occasional driveline fluid drip. So, unless something beneath necessitates crawling under to repair, the ...

Every diesel truck on the road today has a differential and ring and pinion gear set in the rear axle. Four-wheel-drive trucks add a second set of gears and another differential to the front axle to ...

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 ...

In our Oct. '11 issue, we added 70 hp to Project Panther using new cams and cylinder heads from Trick Flow. In the process, we raised the rpm where peak torque and horsepower occur. Since this is a ...