Modified Differential Fluid

Learn what gear oils do for your differential and how to choose the best gear lubricant for your application's needs

Comparing open diff vs limited slip vs locker differentials. Learn how each works, pros and cons, and which is best for your build.

How proportioning valves work, fixed vs adjustable valves explained, and how to reset a prop valve.

The pros and cons of a welded diff vs open diff, plus what to know before learning how to weld your differential.

A short article explaining the main differences between open and limited slip differentials.

Learn the difference between DOT 3 and DOT 4, or DOT 5 and DOT 5.1. Every type of brake fluid has a specific boiling point and water absorbing quality.

Keep your rear cylinders running cool in a high performance engine by installing a water bypass kit to the intake manifold.

Learn how to replace a fuel sending unit. Our fuel gauge sending unit guide and installation video covers all you need to match your fuel sender and gauge.

Tim M. has tried to stay true to the vintage route, but sometimes, exceptions must be made. For example, the original oiling system's paper element and canister are functional, but an upgraded system will be more reliable.