The ‘H4A’ was a modified version of Honda’s first 4-speed automatic transmission, the H4. Introduced in 1990 on the Honda Accord, the H4A series had three shafts, rather than the two found on the H4. It was replaced by the light-duty M6HA series and medium-duty B7XA, leaving a mass overload of used transmissions on the market.
Just to simplify the matter of H4A series of automatic transmissions, the applications:
- 1990- Honda Accord (PX4B)
- 1991-1992 Honda Accord (APX4)
- 1991- Honda Accord (MPXA)
- 1992- Honda Accord (MPWA)
- 1992-1994 Acura Vigor (MPWA)
- 1993- Honda Accord (MPXA)
- 1994-1997 Honda Accord (MPOA)
The transmission may have had an abundance of upgrades, with three shafts to meet the demands of increasing the amount of speed ranges to satisfy more advanced models, the basic premise has not been lost. even though each separate unit requires a different rebuild kit to achieve a quality rebuilt transmission, the design has surprisingly wavered little since the basic inception of the unit.
With that in mind, one of the best deals in the replacement transmission industry is a used transmission. With the availability of JDM transmissions becoming a terrific and prolific source of low mileage units and an abundance of low mileage used transmissions, coming primarily from low mileage wrecked cars, compared to rebuilt, a used transmission is a viable, cost effective and most important, reliable avenue to take if the occasion occurs for a replacement transmission.
