Description:REPROGRAMMING KIT AOD 1980-93 Firm Muscle car shifts; Hold 1st, 2nd, 3rd to any rpm. Wide open 3-4 shift; Holds 4th at high speed. Includes: 4 Hi-Rev Governor Vales # T76165P   1st position manually, upshift to the 2nd/D position for 2nd gear, pull shifter back down to the 1st position: It will stay in 2nd gear, shift to the 2nd/D position again it will now go to 3rd gear, then move shifter to OD for 4th gear.