TRUCK REAR AXLE PRODUCTION CODE NUMBER LOCATIONS Chevrolet Single Speed Truck Stamped on forward upper surface of differential carrier housing Chevrolet 2 Speed Truck Same as single speed Dana Single Speed Truck Stamped on the right tube rear side adiacent to the differential carrier housing Axle ratio on metal tag attached to differential carrier Eaton Single Speed Truck Stamped on top surface of differential carrier housing Eaton 2 Speed Truck Stamped same as Eaton Single Speed Truck l Eaton Tandem Truck Forward unit stamped on left side of differential carrier housing rear unit stamped on top surface of differ ential carrier housing l C 0 P 0 or special equipment axles will be coded as follows sounce cooc Eaton Single Speed Air Brake E1A Eaton Single Speed Hydraulic E1H Eaton Two Speed Air Brake E2A Eaton Two Speed Hydraulic EZH Rockwell Single Speed Air Brake RIA Dana Single Speed DIA 1970 l REAR AXLE IDENTIFICATION AXLE MODEL AXLE MODEL CODE APPLICATION RATIO CODE APPLICATION RATIO TAA CA 20 4 10 1 THV CA 20 4 57 1 N0 Spin TCA GE 20 3 07 1 THW CA 20 4 10 1 TDA CA PA 10 3 73 1 THX CA 20 4 57 1 TDB CA PA 10 4 11 1 THY CA 20 4 57 1 N0 Spin TDC CE 10 3 07 1 TIA CE PA 20 4 57 1 TDD CE 10 3 07 1 TIB CA PA 2O 4 57 1 N0 Spin TDE CA 10 3 07 1 TID CA PS PE 30 5 14 1 TDF KA 10 3 73 1 TIE CA PS PE 30 4 10 1 N0 Spin TDG KE 10 3 07 1 P Trac TIF CA 30 5 14 1 No Spin TDH CA 10 3 73 1 TIG CA 30 PS PE 30 4 57 1 TDI CA 10 3 07 1 TIH CE PE 30 4 10 1 TDJ CA I0 4 11 ws ce 20 4 57 1 TDK GE IO 3 08ZI jX C jg 3 07 1 TDL GE 10 3 0821 P Trac TJY C 10 3 07 1 TDIVI GA 10 3 36rI TJT ce 20 4 57 1 TDN GA 10 3 36 1 P Trac TJU CE 20 4 1O j TDO GA 10 3 73 1 TLJ CA 30 4 10 1 TDP GA 10 3 73 1 P Trac TLN CA PA 20 4 10 1 N0 Spin TDO GA 10 4 11 1 TLV CA 30 5 14 1 TDR GA 10 4 11 1 P Trac TLW CA 30 4 57 1 TDS GE 20 3 07 1 P Trac TLX CA 30 4 10 1 N0 Spin TDT GA 20 3 73 1 TLY CA 30 5 14 1 No Spin TDU GA 20 3 73 1 P Trac TLZ CE 30 4 10 1 N0 Spin TDV GA 20 4 11 1 TMC CA 30 4 57 1 TDW GA 20 4 11 1 P Trac TM Fl CE 30 4 10 1 N0 Spin TDX GA3O 4 10 1 TMV PA 20 4 57 1 TDY 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 TMY PA 20 4 57 1 Toe l A 20 4 57 1 N0 span TM CA PA 20 4 10 1 THU CA 20 410 1 TNA CA 20 4 10 1 l 1970 CHEVROLET MOTOR DIVISION GENERAL MOTORS CORPORATION P A 31MS 81 l