CORVETTE REAR AXLE IDENTIFICATION 4 Axle Identification is stamped on differential carrier along with date of manufacture Pam rum I Type Identification Typ Identification 1955 58 3 peed or 4 SDeed w Metallic Brakes I 3 70 ratio FJ I 3 Speed 4 AH 35Deed or 4S esd w Fositractlon and Powerglide AE Metallic Brakes 3 70 ratio FK I 3Spaed w 3 27 ratio AD 35peed or 4Spaad w Positrsction and I 3Speed w 4 11 ratlo i AJ Metalllc Brakes 4 11 rati FL 3 Speed w Positraction 3 70 ratio AN 3 Deed or 4 Speed w Posltractlon and I 3Speed W Positractlon 4 11 ratio AP Metallic Brakes 4 56 ratio FM I 3Soeed w Fositraction 4 56 ratio AO I Heavy Duty Brake Suspension W Positraction 3 70 ratio AS I Heavy Duty Brake Suspension 1961 I w Positraction 4 11 ratlo AT Hea V DulV Brake Su Pension w Positraction 4 66 ratio AU 3 Snead 3 36 ratlo AC Powerglide 3 55 ratio AE 45Deed 3 70 Flatio AH Posltraction 3 70 ratio AN I Positraction 4 11 ratio AP I 1959 Positraction 4 56 ratio AO Positraction 3 36 ratio AF Positraction w H D Brake Susp I 3 70 ratio AS 35peed or 4 peed AH Positraction w H D Brake Susp Powerglide AE 4 11 ratlo AT V z or 4 speed W Posanmmn 3 70 mum AN P sirr crI w HD Brake Sum I 3 or 4 Speed vv Positrantion 4 11 ratio AP 4 55 ratio AU 3 or 4 Speed w Positractiun 4 56 ratio AO Metallic Brakes 3 70 ratio FJ 3 or 4 Speed w H D Brake Susp and Positraction w Metallic Brakes Positraction 3 70 ratio AS 3 70 ratio FK 3 or 4 Speed w H D Brake Suso and Positraction w Metallic Brakes Positrsctiori 4 11 ratlo AT 4 11 ratio FL 3 or 4 Spaed w H D Brake Susp and Posltraction w Metallic Brakes Positraction 4 56 ratin AV 4 56 ratio FM 3 or 4 Speed w Metallic Brakes FJ 3 or 4 Speed w Positractlon and Metallic I ams 2 70 mw i i I 3 or 4 Speed W Positraction and Metallic 1962 I Brakes 4 11 ratio FL I 3 or 4 Deed w Posltraction and Metallic Q Brakes 4 56 ratio FM 3 S eed 3 36 ratio CA Positractlon 3 36 ratio CB Positraction 3 55 ratio CC Positractlon 3 70 ratio CD Positraction 4 11 ratio CE 1960 Positnntion 4 56 ratio 1 CF 4 Speed CG w Metallic Brakes 3 36 ratio CH w Metallic Brakes 3 55 ratlol CJ 3Speed or 4Spead 3 70 ratio AH Posltractiorrw Metalllc Brake Powerglide 3 55 ratio AE 3 35 ratio CK Fosltraction 3 70 ratio AN Positractlon w Metallic Brakes Posltraction 4 11 ratio AP 3 55 ratio CL Positraction 4 56 ratio AO Foritraction w Metallic Brakes I 3 Speed or 4 oeed w H D Brake Susp 3 70 ratlo CM and Positractlon 3 70 ratlo AS Pcsitraction w Matalllc Brakes 3 Speed or 4Speed w H D Brake Suso 4 11 ratio CN I I and Positractlon 4 11 ratio AT P I Y Tl w Metallic EFBKGS 3Speed or 4 Speed w H D Eraka Susp 4 56 ratio 1 CP and Positractlon 4 56 ratio AU Positractlon w H D Brake Susp CQ GM PARTS DIVISION GENERAL MOTORS CORPORATION CHEVROLE I 14 27