Product Description
Sonnax part number: 37947-13K
Fits: 4R44E, 4R55E, 5R44E, 5R55E
Fits: 4R44E, 4R55E, 5R44E, 5R55E
The end plugs at the kick downshift control, manual low, and throttle downshift control valves become loose. This allows solenoid feed oil to exhaust and drop below 40-45 psi, which prevents the shift valves from stroking fully. Sonnax O-ringed end plug and checkball kit 37947-13K contains O-ringed end plugs for these three locations, which positively seal the circuit to prevent oil loss.
- O-Ringed end plugs positively seal the circuit to prevent oil loss
- End plugs have threaded ends for ease of installation and removal
- Kit contains 4 Torlon® checkballs to replace lost or damaged originals
- Kit contains 4 L-shaped retainer pins to replace lost originals
Symptoms
- Gear ratio & solenoid codes
- Erratic shifts
- No 3rd when hot
- No 4th when hot
- Shift timing change with temperature
Cause
Wear of bore end plugs allowing solenoid feed oil to exhaust.
Correction
Sonnax O-ringed end plug and checkball kit contains O-ringed end plugs to positively seal the bores.
Contents
- End Plugs (2) Small
- End Plug Large
- O-Rings (5) Small, 1 Extra
- O-Rings (3) Large, 1 Extra
- Checkballs (4)
- L Retaining Pins (4)
Product Videos
Custom Field
Transmission Model(s) 4R44E, 4R55E, 5R44E, 5R55E
