How the Truck Works, Common Failure Modes & Service Guides
Long-form technical essays that explain the mechanical theory behind each major system, embed interactive 3D CAD models directly inside the narrative, diagnose common real-world failure points, and walk through component replacement.
Inside the Mazda M5OD-R2 5-Speed Manual Transmission
An interactive technical essay on constant-mesh helical power flow, triple Borg-Warner synchronizers, top-cover rail interlocks, common failure points, and removal procedures.
Introduced for light-duty Ford F-150 and Bronco trucks in 1988, the Mazda-designed M5OD-R2 (M5R2) replaced older cast-iron 4-speeds with a lightweight, rib-reinforced die-cast aluminum housing, an integral bellhousing, a 0.80:1 fifth-gear overdrive, and full synchronization across all five forward gears plus Reverse.
The 11-Inch Diaphragm Clutch & Concentric Slave Cylinder System
An interactive essay on clamping physics, torsional damper hubs, internal concentric hydraulic release bearings, bleeding procedures, and clutch replacement.
To handle the low-RPM torque of the 4.9L inline-six without heavy pedal effort, the 1994 F-150 pairs a 280 mm (11-inch) Belleville diaphragm clutch assembly with an internal hydraulic Concentric Slave Cylinder (CSC) that slides directly over the transmission input quill.
The Ford 4.9L (300 CID) Inline-Six Engine Architecture
An interactive essay on seven-main-bearing rigidity, gear-to-gear camshaft drive, hydraulic flat-tappet valvetrain kinematics, and two-piece EFI airflow.
Built from 1965 through 1996, the 4.9L (300 cubic inch) inline-six is one of the most durable truck engines ever manufactured—combining a deep-skirt seven-main-bearing block, zero timing chain (direct helical gear-to-gear cam drive), and peak torque delivered right off idle.
EEC-IV Electronic Control & TFI-IV Ignition Architecture
An interactive essay on Hall-effect PIP crank/cam sensing, Computer Controlled Dwell (CCD) spark timing, and speed-density fuel injection.
The 1994 F-150 4.9L coordinates spark advance and fuel injector pulsewidth through Ford’s EEC-IV Powertrain Control Module and the gear-driven TFI-IV (Thick Film Integrated) distributor system.
Specialized Mechanism Motion Studies
4.9L Piston, Wrist Pin, Connecting Rod & Crank Throw Study
Dedicated interactive study of single-cylinder reciprocating kinematics.
Cam & Rocker Kinematics Lab4.9L Gear-Driven Camshaft, Lifter, Pushrod & Rocker Study
Dedicated interactive study of valve lift, spring compression, and cam phase.