Re: E4OD/4R100 Gurus - diagnose

There is a tap on the driver's side of the trans just forward of the shift selector shaft. Remove the plug and attach a pressure gauge. Below are what the gear line pressures should be in psi:

P,N: 50-65
R: 70-100
D,2: 50-65
1: 70-100

If the pressures are high, could be problem with regulator value in front pump or EPC. I suggest visiting the Bauman Electronic Controls website (www.becontrols.com) or give them a call. These people are very knowledgeable and can provide additional help in diagnosing the problem.