Here's something for you to look at regarding no reverse:
o No or Delayed Reverse Engagement (Forward OK)
Possible Source(s):
§ Improper fluid level.
Action(s) to Take:
§ Perform «fluid level check» .
Possible Source(s):
§ Manual linkage misadjusted/damaged.
Action(s) to Take:
§ Check and adjust or service as required.
Possible Source(s):
§ Low main control pressure in reverse.
Action(s) to Take:
§ «Control pressure test» .
Possible Source(s):
§ Reverse clutch or reverse clutch stator support seal rings leaking (No. 1 and No. 2).
Action(s) to Take:
§ «Air pressure test» or visually inspect, especially if reverse clutch plates are burnt.
Possible Source(s):
§ Reverse clutch assembly burnt/worn
Action(s) to Take:
§ «Air pressure test» or visually inpect, especially if reverse clutch plates are burnt.
Possible Source(s):
§ Reverse clutch piston check ball leaking/leaking piston seal rings.
Action(s) to Take:
§ «Air pressure test» or visually inspect, especially if reverse clutch plates are burnt.
Possible Source(s):
§ Valve body bolts loose/too tight.
Action(s) to Take:
§ Tighten to 9-11 N-m (80-97 lb-in).
Possible Source(s):
§ Valve body dirty/sticking valves.
Action(s) to Take:
§ Determine source of contamination. Service as required
Possible Source(s):
§ Transmission filter plugged.
Action(s) to Take:
§ Replace filter.
Possible Source(s):
§ Pump damaged.
Action(s) to Take:
§ Visually inspect pump gears. Replace if necessary.