CJ Knowledge Base
Practical information for CJ owners who want their Jeep better, not different.
Learn how changing engine oil, transmission fluid, differential oil, coolant, and brake fluid can reveal hidden problems in a Jeep CJ before they become expensive repairs.
Most CJ overheating problems are not caused by the radiator. Learn how airflow, water pump rotation, thermostats, fan shrouds, and ignition timing actually affect cooling performance.
Thinking about upgrading your AMC 258 fuel system? Compare Motorcraft, Weber, Howell, and Holley Sniper EFI setups, performance expectations, and what actually works on a CJ.
A rough Carter BBD idle is often caused by clogged idle tubes, not a bad carburetor. Learn how to diagnose and clean them before spending money on a rebuild or EFI conversion.
The AMC 20 rear axle in your CJ has one dangerous design flaw, and it can fail during normal driving. Learn what causes it and how to fix it permanently.
CJ steering wander comes from wear, toe and caster alignment, and lift geometry. Learn the real causes, checks, and fixes without parts chasing.
Bigger tires affect gearing, braking, steering, and drivability on CJ-5, CJ-7, and CJ-8. Learn what changes before you buy.
Build a reliable CJ electrical system with clean power, solid grounds, sane fusing, and simple voltage drop testing. Fix the foundation first.
Thinking about buying a Jeep CJ? Here's an honest look at what ownership actually costs, what breaks first, and whether it's the right vehicle for you.