1/ Check fluid levels
2/ Here is a list of issues that can cause No Reverse...in a 700 R4
The bold listings are most likely the issue...
Input Housing Assy:
- 3-4 Apply ring stuck in applied position.
- Forward clutch not releasing.
- Turbine shaft seals missing, cut or damaged.
Oil Pump Assy:
- Retainer & ball assy missing or damaged.
- Stator shaft seal rings or grooves damaged.
- Stator shaft sleeve scored or damaged.
- Reverse boost valve stuck, damaged or misassembled.
- Cup plug missing.
- Restricted oil passage.
- Faces not flat.
- Converter clutch apply valve stuck.
Reverse Input Clutch:
- Clutch plate retaining ring out of groove.
- Return spring assy retaining ring out of groove.
- Seals cut or damaged.
- Restricted apply passage.
- Porosity in piston.
- Belleville plate installed incorrectly.
- Excessive clutch plate travel.
Lo & Reverse Clutch:
- Clutch plate retaining ring mispositioned.
- Porosity in piston
- Seals damaged.
- Return spring assy retaining ring mispositioned.
- Restricted apply passage.
Time for a shop to look at it...
