Technical Reference Library
Apex Technical Guides
Authoritative, shop-floor-verified references on transmission systems, OBD2 emissions diagnostics, and automotive repair — authored by ASE Master Technician David L. Dyer, Sr. and reviewed by Apex's lead diagnostic technician.
ASE-verified content · Updated to current manufacturer specifications
Featured Guides
BeginnerEmissions
Arizona Emissions Testing: What to Do When You Fail
5 min readRead guide
IntermediateEmissions
OBD-II Readiness Monitors & Drive Cycles: The Complete Technical Guide
8 min readRead guide
AdvancedEmissions
Diagnosing P0420 & P0430: Catalytic Converter Efficiency Codes
6 min readRead guide
technicalTransmission
Ford 6R80 Transmission: Complete Diagnostic and Repair Guide
A comprehensive technical reference for the Ford 6R80 six-speed automatic transmission — covering documented failure modes, programming timelines by model year, TCM calibration procedures, and diagnostic protocols used at Apex Automotive & Emissions.
3 min readRead guide
All Guides (4)
EmissionsBeginner
Arizona Emissions Testing: What to Do When You Fail
5 min read
EmissionsIntermediate
OBD-II Readiness Monitors & Drive Cycles: The Complete Technical Guide
8 min read
EmissionsAdvanced
Diagnosing P0420 & P0430: Catalytic Converter Efficiency Codes
6 min read
Transmission · Ford Transmissiontechnical
Ford 6R80 Transmission: Complete Diagnostic and Repair Guide
A comprehensive technical reference for the Ford 6R80 six-speed automatic transmission — covering documented failure modes, programming timelines by model year, TCM calibration procedures, and diagnostic protocols used at Apex Automotive & Emissions.
3 min read