TRUCK REAR AXLE PRODUCTION CODE NUMBER LOCATIONS I Chevrolet Single Speed Truck Stamped on forward upper surface of differential carrier housing I I Chevrolet 2 Speed Truck Same as si ngle speed A y Dana Sing Ie Sgeed Truck Stamped on the right tube rear side adjacent to the differential carrier housing Axle ratio on metal Atag attached to differential carrier A Eaton Single Speed Truck Stamped on top surface of differential carrier housing t Eaton 2 Speed Truck Stamped same as Eaton Single Speed Tmck Eaton Tandem Truck Forward unit stamped on left side of differential carrier housing rear unit stamped on top surface of differ A I ential carrier housing C 0 P 0 or special equipment axles will be coded as follows I A A SOURCE I CODE I Eaton Single Speed Air Brake I EIA A A A Eaton Single Speed Hydraulic I E1 l e A I A Eaton Two Speed Air Brake E2A e Eaton Two Speed Hydraulic E2H I Rockwell Single Speed Air Brake RIA I y Dana Single Speed DIA A 1970 R T A REAR AXLE IDENTIFICATION A A I AXLE MODEL A AXLE I A MODEL A CODE APPLICATION A RATIO CODE A APPLICATION RATIO TAA I GA 20 4 10 1 THV n CA 20 A 4 57 1 N0 Spin TCA GE 20 3 07 1 A THW CA 20 4 10 1 I TDA CA PA 10 3 73 1 A THX CA 20 4 57 1 a TDB CA PA 10 4 11 1 A THY CA 20 4 57 1 No Spin TDC CE 10 3 07 1 TIA CE PA 20 4 57 1 A A TDD CE 10 3 07 1 TIB CA PA 20 4 57 1 No Spin TOE CA 10 3 07 1 TID CA PS PE 30 5 14 1 TDF KA 10 A 3 73 1 TIE CA PS PE 30 4 10 1 No Spin TDG KE 10 3 07 1 P Trac TIF CA 30 5 14 1 N0 Spin TDH CA 10 3 73 1 TIG CA 30 PS PE 30 4 57 1 A ATDI I CA 10 3 07 1 TIH CE PE 30 4 10 1 A TDJ CA 10 4 11 1 TJ CE gg A 4 57 1 TDK GE 10 3 08 1 A Tax C10 3 07 1 t TDL GE 10 3 08 1 P Trac TJY C 10 I 3 07 1 A I TDM GA 10 3 36 1 TJT CE 20 4 57 1 TDN GA 10 3 36 1 P Trac TJU CE 20 4 10 1 TOO GA 10 3 73 1 V TLJ CA 30 4 10 1 TDP V GA 10 3 73 1 P Trac TLN CA PA 20 4 10 1 N0 Spin TDQ GA 10 4 11 1 TLV CA 30 5 14 1 I TDR GA 10 4 11 1 P Trac TLW CA 30 4 57 1 I TDS GE 20 3 07 1 P Trac TL CA 30 4 10 1 N0 Spin A TDT GA 20 3 73 1 TLY CA 30 5 14 1 No Spin A TDU GA 20 3 73 1 P Trac TLZ CE 30 4 10 1 No Spin TDV GA 20 4 11 1 TMC CA 30 4 57 1 TDW GA 20 4 11 1 P Trac i TMR CE 30 4 10 1 No Spin TDX GA30 4 10 1 TMV PA 20 4 57 1 I TOY GE 30 4 10 1 TMW PA 20 4 10 1 TDZ GA 30 4 57 1 TMX CA Ps PE 30 6 17 1 11000 TGA KE 20 4 57 1 A TMY PA 20 4 57 1 I me KA 20 4 57 1 Iva span TMZ CA PA 20 4 10 1 THU CA 26 4 1 1 TNA CA 20 4 1021 GM PARTS DIVISION GENERAL MOTORS CORPORATl0N CHEVROLET 72TL I 55