Part profile
transmission · General Motors
The Turbo Hydra-Matic 400 is the GM automatic-transmission reference; Stage 1-specific BB calibration notes remain car-level evidence.
45 linked car pages.
multiple two-door body styles documented: post coupe, hardtop, convertible
1967
Two-door 4-4-2 coupe, hardtop, or convertible; verify the individual body style from the VIN and body tag
350 hp at 5,400 rpm and 435 lb-ft at 3,600 rpm
2-door hardtop coupe
Factory Pontiac Firebird 400 model path
2-door hardtop coupe
Factory Pontiac GTO ordered with the 400 HO engine path
2-door hardtop coupe and convertible
1968 Buick GS 400
2-door Holiday hardtop or Sport Coupe
Oldsmobile production car completed with Hurst Performance / Demmer Engineering conversion work
Holiday coupe, sport coupe, and convertible context; exact W-30 body-style split requires source-specific verification
Factory Oldsmobile 442 with W-30/OAI package
2-door hardtop coupe
Factory Pontiac Firebird 400 package with optional 400 HO engine path
2-door hardtop coupe
Factory Pontiac Firebird Ram Air II path
Two-door hardtop, coupe, and convertible context
Mid-year 1968 Pontiac factory Ram Air II performance option for the GTO
Two-door Sport Coupe or Convertible Coupe
Factory option on 1969 GS 400
1969 Camaro coupe; Baldwin-Motion Phase III identity requires Baldwin/Motion documentation rather than stripes or hood evidence alone
Dealer-built Baldwin Chevrolet / Motion Performance Phase III Camaro
1969 Chevelle hardtop/coupe donor context; Baldwin-Motion Phase III identity requires Baldwin/Motion paperwork rather than Stinger hood or Motion equipment alone
Dealer-built Baldwin Chevrolet / Motion Performance Phase III Chevelle
Holiday Coupe / 2-door hardtop
906 production hardtops documented by H/OCA
Sports coupe, Holiday hardtop coupe, and convertible context; exact body-style split requires source-specific verification
Factory Oldsmobile 4-4-2 W-30 performance option, not a dealer-built special edition.
2-door coupe / hardtop
Regular Firebird 400 Ram Air IV path; separate from the WS4 Trans Am package.
2-door coupe / hardtop
Pontiac factory Firebird Trans Am package with optional Ram Air IV engine.
Two-door hardtop, coupe, and convertible context
1969 Pontiac factory Ram Air IV performance option for the GTO
2-door hardtop coupe or convertible
Factory Buick GS 455 series
GS455 two-door Sport Coupe or Convertible Coupe
Factory Buick GS455 Stage 1 performance configuration
2-door hardtop
Factory Buick GS 455-based GSX hardtop package
2-door Hardtop
400 Stage 1 units (of 678 total GSX units)
2-door Nova hardtop/sedan body; Yenko Deuce identity requires COPO/Yenko documentation rather than stripes alone
COPO/Yenko dealer-program Nova using the LT-1 350 small-block
2-door hardtop or convertible
Oldsmobile 4-4-2 with W-30 performance package
Cutlass Supreme Holiday Coupe or convertible
SX-only high-compression 455 with a four-barrel carburetor, TH400, and dual exhaust
2-door coupe
Formula 400 with optional Ram Air 400, commonly called Ram Air III; not a Trans Am Ram Air IV.
2-door coupe
Factory Pontiac Firebird Trans Am
hardtop coupe / convertible
455 cu in Pontiac L75/HO V8
2-door hardtop coupe
Factory Pontiac GTO Judge ordered with the optional 400 Ram Air IV engine path
1970 GTO hardtop or convertible donor context; Royal Bobcat identity requires Royal paperwork, kit receipts, period photos, owner history, or equivalent car-specific evidence rather than decals or tune-up claims alone
Royal Pontiac dealer tuning or Royal-supplied Bobcat kit
Two-door sport coupe hardtop; convertible also documented
Factory Stage 1 option on 1971 Buick GS/GS 455 records
2-door hardtop / sport coupe
GSX package on 1971 Buick GS, with Stage 1 455 selected.
2-door Holiday hardtop coupe or convertible
Factory Oldsmobile 442 option package
2-door coupe
1971 Firebird Formula 455 with optional LS5 455 HO, including Ram Air configuration where documented; not a Trans Am appearance package.
2-door coupe
1971 Firebird Trans Am series 22887 with standard LS5 455 HO, shaker cold-air hood system, spoilers, fender extractors, F60-15 tires, and Trans Am identification.
Two-door hardtop and convertible context
1971 Pontiac factory GTO ordered with the 455 HO engine path
hardtop coupe / convertible
Factory Pontiac GTO ordered with the final-year Judge package and 455 HO path
2-door hardtop or convertible (GS series)
Factory GS Stage 1 performance configuration
Cutlass Supreme hardtop or convertible; W-30/W46 Hurst/Olds configuration
Hurst Performance, with conversion work recorded at the Demmer facility in Lansing, Michigan
Cutlass or Cutlass S two-door hardtop/sports coupe, or Cutlass Supreme convertible
L77 455 W-30 V8, rated at 300 net hp and 410 lb-ft
2-door coupe
1972 Firebird Formula 455; Tran-Zam notes all Formula 455s were equipped with LS5 455 HO in 1972.
LeMans and LeMans Sport coupe/hardtop GTO-option context
1972 Pontiac LeMans/LeMans Sport ordered with GTO package and 455 HO engine path
two-door Colonnade hardtop coupe, including Sun Coupe
XS-code 455 CID Stage 1 V8
2-door hardtop coupe
Factory Pontiac Firebird Trans Am with LS2 SD-455 option
2-door coupe
Factory-built Pontiac Firebird Trans Am