Product Description
4R44E, 4R55E, 5R44E, 5R55E
O-Ringed End Plug & Checkball Kit
Part No. 37947-13K
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
- 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)
Symptoms:
- Gear ratio & solenoid codes
- Erratic shifts
- No 3rd when hot
- No 4th when hot
- Shift timing change with temperature
