USATransdoctor.com
 These recommendations do not cover all possibilities. They are some things to check before you have your transmission rebuilt. Always check transmission fluid level first. Always run a scanner on any computer controlled transmission. On modulated transmissions make sure they have enough vacuum.

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Accord 1983-84 1.8L AK / AS 1986-89 2.0L F-4 1990 2.2L PX4B 1991 2.2L MPXA
  1991-92 2.2L U S built APX4 1992 2.2L MPWA Japan built 1993 2.2L MPXA 1994-97 2.2L MPOA/AOYA/ BOYA
  1995-97 2.7L MPZA 1998-01 2.3L BAXA 1998-01 3.0L B7XA  
Civic 1989-901.6L S-5 1992-951.5/ 1.6L  A24A/ A2YA 1996 1.6L A4RA  
  1997-98 1.6L B4RA B46A M4RA      
Civic CRX 1981-85 1.3/1.5L 3SPD 1986-87 1.5L CA 1988-91 1.5/1.6L L4  
Del Sol 1993-97 1.6L M24A S24A      
Odyssey 1995-98 2.2/2.3L MPJA MDWA 1999-01 3.5L B7YA B7TA 2002-2008 3.5L BYBA BGRA PGRA  
Passport 1994-01 2.6/3.2L 4L30E      
Prelude 1980-82 1.8L 3SPD 1983-85 1.8L AS 1985-87 2.0L F4 1988-89 2.0L K4
  1990-91 2.0/2.1L PY8A MY8A 1992-01  2.2/2.3L MP1A M6HA    

 

 

 

PX4B /   MPXA / APX4 / MPWA / MPOA / AOYA / BOYA / MPZA / BAXA / B7XA / APXA / A24A / A2YA / A4RA / B4RA / M4TA / M24A / MPJA / PY8A / MP1A / BYBA/ BGRA/ PGRA
 The transmissions above are front wheel drive 4 speed automatic transmissions. They are computer and throttle pressure controlled.  Common symptoms are transmission shifting erratic, slipping or not shifting at all.

External sensors like the throttle position sensor, vehicle speed sensor or output speed sensor quite often go bad, causing these symptoms. Always run a scanner first and check your throttle pressure cable adjustment to see if they are causing the problems. Check the shift solenoids that attach to the transmission casing, sometimes they can go bad. Always replace the linear solenoid on these units if you rebuild it they go bad a lot and control the transmission pressures.

 

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AK / AS / F4 / S5 / CA / L4 / K4 
 The transmissions above are front wheel drive 4speed automatic transmissions. Most are computer and throttle pressure controlled.  Common symptoms are transmission shifting erratic, slipping or not shifting at all.

External sensors like the throttle position sensor, vehicle speed sensor or output speed sensor quite often go bad, causing these symptoms.   Always run a scanner first and check your throttle pressure cable adjustment to see if they are causing the problems. If the transmission has shift solenoids that attach to the transmission casing, they should be checked, they can go bad causing the above symptoms.

 

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3SPEED
This transmission is a front wheel drive 3 speed automatic.  Common symptoms are early soft, late hard shifts or no shifts at all. Always check the throttle pressure cable that goes from your carburetor or throttle body linkage to the transmission.  This controls shift points and often the cable gets out of adjustment, or breaks.

 

 

 

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4L30E
 The transmission above is a rear wheel drive 4 speed automatic, that is all computer controlled. It uses a microcomputer to judge operating conditions while monitoring the throttle position sensor and vehicle speed sensor and many others.  Common symptoms are trans shifting erratic, slipping or not shifting at all. external sensors on the vehicle like the winter mode switch, throttle position sensor and vehicle speed sensor, quite often go bad causing these symptoms.

Always run a scanner first to see if a sensor is causing your problem. I recommend that you change the transmission fluid on this style transmission about every 12,000 to 15,000 miles.

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