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Authenticity reference

Transmission, axle, brakes, and suspension

date correctness · documented

Reference Details

Common issue
Later automatic, axle, disc conversion, lowered suspension, power equipment, or modified wheels represented as original delivery · 1957 Oldsmobile Super 88
Confidence
documented · 1957 Oldsmobile Super 88
Correct value
Manual or Jetaway transmission matched to controls, axle ratio, steering, brake assist, springs, dampers, wheels, tires, dates, and records · 1957 Oldsmobile Super 88
Where to check
Transmission and controls, axle housing and carrier, steering, brake hydraulics and drums, springs, dampers, frame, wheels, dates, and service records · 1957 Oldsmobile Super 88
Common issue
Four-speed swap, later axle, disc conversion, or heavy-duty suspension represented as born with the car · 1963 Studebaker Gran Turismo Hawk
Confidence
documented · 1963 Studebaker Gran Turismo Hawk
Correct value
Production-order-supported transmission and controls, matching axle and Twin-Traction status, self-adjusting drums or factory front discs, and regular or complete Super Hawk suspension · 1963 Studebaker Gran Turismo Hawk
Where to check
Case and tag, pedals, shifter, driveshaft, axle, brakes, springs, shocks, links, bars, dates, and records · 1963 Studebaker Gran Turismo Hawk
Common issue
Four-speed swap, later axle, disc conversion, or heavy-duty suspension represented as born with the car · 1964 Studebaker Gran Turismo Hawk
Confidence
documented · 1964 Studebaker Gran Turismo Hawk
Correct value
Production-order-supported transmission and controls, matching axle and Twin-Traction status, self-adjusting drums or factory front discs, and regular or complete performance suspension · 1964 Studebaker Gran Turismo Hawk
Where to check
Case and tag, pedals, shifter, driveshaft, axle, brakes, springs, shocks, links, bars, dates, and records · 1964 Studebaker Gran Turismo Hawk
Common issue
Replacement transmission or axle, assumed G80, vacuum-brake conversion, altered suspension, drag equipment, or modern wheels represented as factory delivery · 1986 Buick Regal Grand National
Confidence
documented · 1986 Buick Regal Grand National
Correct value
200-4R, 3.42 axle with open or documented G80 carrier, Powermaster disc/drum brakes, Gran Touring suspension, fast-ratio steering, wheels, tires, dates, and SPID codes that agree · 1986 Buick Regal Grand National
Where to check
Transmission stamp and controls, axle housing and carrier, SPID label, brake assist and hydraulics, suspension, steering, wheels, tires, service records, and dated components · 1986 Buick Regal Grand National
Common issue
Replacement transmission or axle, assumed G80, vacuum-brake conversion, altered suspension, drag equipment, or modern wheels represented as factory delivery · 1987 Buick Regal Grand National
Confidence
documented · 1987 Buick Regal Grand National
Correct value
200-4R, 3.42 axle with build-appropriate differential, Powermaster disc/drum brakes, Gran Touring suspension, fast-ratio steering, wheels, tires, dates, and SPID codes that agree · 1987 Buick Regal Grand National
Where to check
Transmission stamp and controls, axle housing and carrier, SPID label, brake assist and hydraulics, suspension, steering, wheels, tires, service records, and dated components · 1987 Buick Regal Grand National

Cars With This Authenticity Marker

5 linked car pages.

Sources & Documentation

Rock River Valley Chapter, Studebaker Drivers Club 1963 GT Hawk
Rock River Valley Chapter, Studebaker Drivers Club 1964 GT Hawk