Vehicle moves in N position/mode, shift cable is properly adjusted

Probable cause(s)

• Forward clutch defective
• Reverse brake defective
• Reverse brake piston defective
• Spring retainer/return spring assembly defective
• Thrust needle bearing on input shaft assembly seized, worn, or damaged
• Manual valve worn or damaged
• Stator shaft worn or damaged

Notes 

• Inspect the clearance between the forward clutch end-plate and the top disc . If the clearance is out of tolerance, replace the input shaft assembly.
• Inspect the reverse brake piston and the O-rings. Check the spring retainer/return spring assembly for wear and damage. Inspect the clearance between the reverse brake end-plate and the top disc . If the clearance is out of tolerance, inspect the reverse brake discs and reverse brake plates for wear and damage. If the discs and plates are worn or damaged, replace them as a set. If they are OK, adjust the clearance with the reverse brake end-plate.
• Check the thrust needle bearing on the input shaft assembly for seize, wear, and damage. If the thrust needle bearing is seized, worn, or damaged, replace it and also check the related part of the input shaft assembly for wear and damage.
• Check the manual valve for wear and damage.
• Check the stator shaft for wear and damage.