Mazda Speedometer Drive Gear Interchange Codes Car Year Cnt Color Diam Avail Part # A4A7T2 616, 808, 1600 PU 18.20 0305 17 341 RX-2 early 6 No 0620 17 341 B RX-3 early 5 No 0820 17 341 R2A5A7R3 RX-2, 618, 808, RX-3, Cosmo, REPU C To 7706 6 No 0862 17 341 T5T6T4T7R6M05 REPU, B2200, B2000, RX-7 '86, Cosmo, Miata C From 7706 6 22.95 1281 17 341 808 auto '72 5 No 2228 17 341 618 Auto 4 No 2541 17 341 A R7A7 RX-7 (808, 1600) RX-7 '79-'85 5 25.10 3728 17 341 A T3A9T4 1800 PU, RWD 626, B2000 25.10 3877 17 341 A A8 GLC RWD 22.95 3919 17 341 B1 929 13.55 M501 17 341 A M05 Miata 22.95 M503 17 341 T8 B2600 4X4 27.95 M506 17 341 R6T8T9 RX-7 T2 & Automatic, 4 X 4 PU '87 20 22.95 R501 17 341 A R8B1V1B2V2 TT, MPV, 929 13.55 R502 17 341 A V1V2 MPV 30.70 R503 17 341 A A4A7T2 616, 808, B1600 19.50 0305 17 345 A6 Mizer 21.85 0324 17 345 A7 808 No 0494 17 345 R2A5 RX-2, 618 early 20 M 17.75 0620 17 345 A T3 B1800 17.75 0713 17 345 RX-3 early 16 No 0820 17 345 808 auto '72 18 No 2228 17 345 618 Auto 14 No 2541 17 345 A T3 1800 PU 17.75 3870 17 345 RX-4 19 Red S 17 441 A7R3 808, RX-3 19.50 0862 17 441 Mazda Speedometer Drive Gear Interchange Codes Car Year Cnt Color Diam Avail Part # R6 RX-7 Convertible & Automatic '86 19 S 16.85 0862 17 441 A A5A7 REPU '74, 618, 808 21 L 16.45 1011 17 441 R6 RX-7 GTUs '89 21 15.70 1011 17 441 A M5 Miata 16.85 1472 17 441 A A8 GLC RWD 1526 17 441 R2 REPU '75 M/T, RX-2, RX-3 20 Blk S 17.75 1669 17 441 R6 RX-7 '86 20 Blk S 16.85 1669 17 441 A T3 B1800 17.75 3877 17 441 T4 B2000 17.75 3877 17 441 A T5T4T3 REPU '75 Auto, B1800, B2000, Cosmo '75 18 Grn S 19.50 3902 17 441 T7T8T9 B2000, B2600 4X4, B2200 4X4 16.85 3902 17 441 A A6A8 GLC RWD, 808, Mizer 17.75 3919 17 441 A8 GLC RWD 16.45 3953 17 441 A8 GLC RWD 15.70 3953 17 441 A R7A7 RX-7, 808 '79-'85 17 L 17.75 8057 17 441 A R7 RX-7 '79-'85 17 L 18.60 8057 17 441 C R7 RX-7 '79-'85 17 L 18.60 8562 17 441 A T4 B2000 17.75 8788 17 441 T4T6 B2000, B2200 18.60 8788 17 441 A A9 626 RWD 22 L 17.75 8854 17 441 A9 626 RWD 22 L 18.60 8854 17 441 A M05 Miata 16.85 BU55 17 441 V1 MPV 16.85 BV11 17 441 V1V2 MPV 16.85 BV12 17 441 T8 B2600 4X4 16.85 BV50 17 441 T6T4T9T8 B2200, B2000, B2200 4X4, B2600 4X4 16.85 M501 17 441 B1 929 10.05 M502 17 441 Mazda Speedometer Drive Gear Interchange Codes Car Year Cnt Color Diam Avail Part # B1 929 16.85 M503 17 441 B1 929 16.85 M504 17 441 T4 B2000 19.50 M509 17 441 M05 Miata 16.85 M510 17 441 T8 B2600 4X4 16.85 M515 17 441 T8 B2600 4X4 16.85 M516 17 441 T8 B2600 4X4 16.85 M517 17 441 V1 MPV 16.85 R501 17 441 B1V1V2 929, MPV 10.05 R502 17 441 V1 MPV 10.05 V501 17 441 Codes - from Mazda price book Car - partial translations of the codes Year - usually the first year used for the first application listed Cnt - number of gear teeth where this is either published or observed Color - observed on plastic driven gears Diameter - S, M, or L for small, medium or large Avail - retail price from Mazda price book as of 1996, indicating you probably can buy a new one Part # - Mazda's part numbers with hyphens omitted and an additional space for applicable suffixes These are from RWD cars only and exclude transmissions designed or originally produced by Ford This table is obviously incomplete. Any email submissions of tooth counts, color or diameter are welcome and will be used to update this table. To those who don't know Mazda's part numbering system, part numbers beginning with a letter are newer.