AUTO TRANSMISSION (TH-350)

 

O - other possible causes

I - most probable cause

problem

Causes

Slips in all ranges

Drive slips no first gear

No 1-2 upshift

Slips, 1-2 upshift

Harsh 1-2 upshift

No 2-3 upshift

2-3 upshift early or late

Slips, 2-3 upshift

No full throttle down-shift

2-3 upshift, full throttle only

Car drives in neutral

Slips in reverse

1-2 or 2-3 shifts noisy

Noisy in all ranges

Spews oil out the breather

Low oil level/water in oil

O

O

 

O

     

O

     

O

I

O

O

Vacuum leak

   

O

 

O

 

O

 

O

O

         

Modulator and/or valve

O

O

 

O

O

   

O

O

   

O

     

Strainer and/or gasket

O

O

                 

O

 

O

O

Governor valve/screen

   

O

     

O

               

Valve body gasket/plate

O

O

O

O

 

O

O

O

     

O

 

O

 

Pressure regulator valve

O

O

O

O

O

 

O

O

O

   

O

   

 

1-2 shift valve

   

O

O

 

           

O

   

 

2-3 shift valve

 

     

 

O

O

O

O

         

 

Detent valve and linkage

 

   

 

 

 

O

   

O

I

     

 

2-3 accumulator

 

 

 

O

 

     

O

           

Manual valve linkage

O

O

 

 

 

           

O

     

Pump gears

 

 

 

               

O

     

Gasket screen-pressure

O

O

 

               

O

 

O

 

 

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