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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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C30 / C30R 2008 2.5L  5 SPEED FWD 55-50SN    
40 Series 2002-08 5 SPEED FWD 55-50SN    
50 AND 60 Series 2002-08 5 SPEED FWD 55-50SN    
70 Series AND V70R 998-00 2.3/2.4L AW50-42LE 2006-2008 2.5  3.2,   6 SPD FWD  TF-80SC  
80 Series 1999-2002 2.5L 4T65E      2003-2006  2.5L
 5 SPEED FWD 55-50SN
2007-2008 3.0,  3.2,  4.4L
TF-80SC
90 Series 2003-2005 2.9L 4T65E   2004-2006  2.5L
 5 SPEED FWD 55-50SN
2006-2008  3.2,  4.4L
TF-80SC
240 1985-92 2.3L AW70 1992-93 2.3L AW70L  
740 1985-89 2.3L ZF- 4HP22 Diesel 1985-90 2.3L Turbo AW71 1985-91 2.3L AW70
  1990-92 2.3L AW70L 1990-92 2.3L AW72L 1990-92 2.3l turbo AW71L
760 1985-90 2.3L Turbo AW71 1985-90 2.8L AW71  
780 1987-90 2.3L Turbo AW71 1987-90 2.8L AW71  
850 1993-97 2.3/2.4L AW50-40    
940 1991-97 2.3L AW72L 1991-97 2.3Lturbo AW71L  
960 1993-97 2.9L A341E    
S80 1999 2.4L AW50-42LE 1999 2.9L 4T65E  
CROSS COUNTRY 2002  2.4L   5 SPEED FWD 55-50SN    

 

4T65E
The transmission above is a 4 speed automatic that is computer controlled.  If your check engine light comes on, or the transmission starts shifting erratic or not at all. 

Make sure you or a shop runs a scanner on the vehicle.  You want to see if a sensor has gone bad causing your problem. Always check your external sensors first.

 

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ZF4HP22
The transmission above is a rear wheel drive 4 speed automatic and shift timing is controlled by a throttle pressure cable that connects from the transmission to the carburetor or throttle body.

Always check these items first before your purchase a transmission.  Also make sure your clutch fan on the front of the motor is not starting to seize up.  This causes the engine to sound unusually loud almost like the transmission is not shifting into 4th gear.

 

 

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AW341E
The transmission above is a rear wheel drive 4 speed automatic transmission. This transmission is computer and throttle pressure controlled. Common symptoms are transmission shifting erratic, slipping or not shifting at all.

Always check your throttle pressure cable adjustment to see if it is causing the problem. On most of these models, they have a diagnostic box you can retrieve codes with. The location of this box should be in your owners manual. If you don't have a diagnostic box then run a scan nner. 

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AW70 / AW70L / AW71 / AW71L / AW72L
The transmissions above are rear wheel drive 4 speed automatics and shift timing is controlled by the computer and a throttle pressure cable that connects from the transmission to the carburetor or throttle body. Common symptoms are transmission shifting erratic, slipping or not shifting at all. Also the check engine light can come on.

Always check your throttle pressure cable adjustment to see if it is causing the problem. On most of these models, they have a diagnostic box you can retrieve codes with. The location of this box should be in your owners manual. If you don't have a diagnostic box then run a scanner. Always check these items first before your purchase a transmission.  

Make sure your clutch fan on the front of the motor is not starting to seize up. This causes the engine to sound unusually loud almost like the transmission is not shifting into 4th gear.

 

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AW50-42LE / AW50-40
The transmission above is a front wheel drive 4 speed automatic transmission. This style transmission is computer and throttle pressure controlled. Common symptoms are transmission shifting erratic, slipping or not shifting at all. Also the check engine light can come on.

External sensors like the throttle position sensor, vehicle speed sensor or output speed sensor quite often go bad, causing these symptoms.
Always check your throttle pressure cable adjustment to see if it is causing the problem. On most of these models, they have a diagnostic box you can retrieve codes with. The location of this box should be in your owners manual. If you don't have a diagnostic box then run a scanner. Always check these items first before your purchase a transmission.  

Check the shift solenoids that attach to the valve body, sometimes they can go bad.

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55-50SN

The transmission above is a front wheel drive 5 speed automatic transmission. They are computer controlled.  Common symptoms are transmission shifting erratic, harsh or erratic reverse. Also the check engine light can come on.

External sensors like the throttle position sensor, vehicle speed sensor, inhibitor switch can go bad, causing these symptoms. Always run a self diagnostic check first to see if a sensor is causing your problem.
This transmission has severe valve body wear, along with common solenoid problems, the shift solenoids that attach to the valve body, sometimes they can go bad between 65.000 and 100.000 miles. I have found that many times the only fix for some of the valve body problems is to purchase one from the dealership. sorry cause they are expensive.


 

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TF-80SC

The transmission above is a front wheel drive 6 speed automatic transmission. They are computer controlled.  Common symptoms are transmission shifting erratic, harsh or erratic reverse. Also the check engine light can come on.

External sensors like the throttle position sensor, vehicle speed sensor,
The multi function switch can go bad, causing these symptoms. Always run a self diagnostic check first to see if a sensor is causing your problem. This transmission has severe valve body wear, along with common solenoid problems, the shift solenoids that attach to the valve body, sometimes they can go bad between 65.000 and 100.000 miles. I have found that many times the only fix for some of the valve body problems is to purchase one from the dealership. sorry cause they are expensive.

 

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