Ford E4OD/4R100 Solenoid Pack 1998-05 With Pulse With Modulation (PWM) This auction is for NEW E4OD 4R100 Solenoid Pack. If you are experiencing shifting problems you may want to consider replacing this Solenoid pack. Don't put a used part that has already proved failure back into your rebuilt transmission replace it with a new one; save yourself from a future problem. Note: If you need any other parts for your E4OD/4R100 please check out our store!