Why It Matters
The 455 used an M40 Turbo Hydra-Matic 400 identified by a 1975 OD tag, or OW tag for California cars, plus a car-matching VIN stamp.
Also Known As
1975 Hurst Olds TH4001975 Oldsmobile OD transmission1975 Oldsmobile OW California transmission1975 W-30 M40 automatic
