Reference Details
- Common issue
- A later Dual-Range control or changed axle is treated as original 1951 equipment. · 1951 Hudson Hornet
- Confidence
- documented · 1951 Hudson Hornet
- Correct value
- Manual, overdrive, or Hydra-Matic with the corresponding factory axle ratio · 1951 Hudson Hornet
- Where to check
- Transmission identifiers, controls, axle ratio, speedometer drive, and paperwork · 1951 Hudson Hornet
- Common issue
- A later transmission or axle swap is assumed to be the original factory pairing. · 1954 Hudson Hornet 308
- Confidence
- documented · 1954 Hudson Hornet 308
- Correct value
- 4.09 or 4.55 manual/overdrive gearing, or 3.07 with Dual-Range Hydra-Matic, as supported by the individual build · 1954 Hudson Hornet 308
- Where to check
- Transmission type and identifiers, axle ratio, speedometer gearing, paperwork, and service history · 1954 Hudson Hornet 308
- Common issue
- A replacement transmission or differential may work correctly without matching the factory Rebel pairing. · 1957 Rambler Rebel 327 V8
- Confidence
- documented · 1957 Rambler Rebel 327 V8
- Correct value
- T-85/R11 overdrive with 4.10 or 4.44 axle, or Flashaway Hydra-Matic with 3.15 axle · 1957 Rambler Rebel 327 V8
- Where to check
- Transmission case and controls, overdrive unit, torque tube, axle assembly, ratios, component dates, and records · 1957 Rambler Rebel 327 V8
- Common issue
- A changed axle or later automatic is treated as factory-installed equipment. · 1957 Studebaker Golden Hawk
- Confidence
- documented · 1957 Studebaker Golden Hawk
- Correct value
- T85 overdrive with 4.27 baseline or Flight-O-Matic with 3.31 baseline; Twin-Traction only when documented · 1957 Studebaker Golden Hawk
- Where to check
- Production order, transmission identifiers, axle tag and internals, controls, and service records · 1957 Studebaker Golden Hawk
- Common issue
- Later transmission, floor conversion, axle swap, or added Sure-Grip represented as delivered equipment · 1964 Plymouth Barracuda
- Confidence
- documented · 1964 Plymouth Barracuda
- Correct value
- Three-speed, TorqueFlite, or 225/273 four-speed with matching controls and a permitted 2.93, 3.23, or 3.55 axle combination · 1964 Plymouth Barracuda
- Where to check
- Transmission, controls, axle housing and ratio, dates, and records · 1964 Plymouth Barracuda
- Common issue
- A working four-speed or Safe-T-Track swap is assumed to be factory-installed. · 1965 Pontiac Catalina 2+2 421
- Confidence
- documented · 1965 Pontiac Catalina 2+2 421
- Correct value
- 3.42 standard manual or 3.23 standard automatic, with documented alternatives such as close-ratio four-speed and 4.11 · 1965 Pontiac Catalina 2+2 421
- Where to check
- PHS invoice, transmission identifiers and dates, axle code and ratio, and air-conditioning equipment · 1965 Pontiac Catalina 2+2 421
- Common issue
- A working four-speed, Safe-T-Track, or axle swap is assumed to be factory-installed. · 1966 Pontiac Catalina 2+2 421
- Confidence
- documented · 1966 Pontiac Catalina 2+2 421
- Correct value
- 3.42 standard manual or 3.23 standard automatic, adjusted where documented for air conditioning or close-ratio four-speed · 1966 Pontiac Catalina 2+2 421
- Where to check
- PHS invoice, transmission identifiers and dates, axle code and ratio, and air-conditioning equipment · 1966 Pontiac Catalina 2+2 421
- Common issue
- Assuming every 1968 SS 350 received a 12-bolt or importing 1969 SS 350 axle assumptions. · 1968 Chevrolet Camaro RS SS 350
- Confidence
- documented · 1968 Chevrolet Camaro RS SS 350
- Correct value
- M15/M35 SS L48 context aligns with 10-bolt rows; M20 SS L48 context aligns with 12-bolt rows in CRG visual-ID coverage · 1968 Chevrolet Camaro RS SS 350
- Where to check
- Transmission stamping/case evidence, shifter hardware, axle tube stamp, rear housing, and paperwork · 1968 Chevrolet Camaro RS SS 350
