Honda Pilot transmission problems are nothing new. But according to American Honda, this particular one has a rather long list of potential causes.
What Transmission Do I Have?

BVGA 2 and/or 3rd clutch discs and plate
Third clutch transmission fluid pressure switch is defective
Crutch piston, check valve O rings
Second and/or third accumulator failure (this acts like a little shock absorber that absorbs excess energy during and after a shift)
Shift solenoid valve C defective
Shift valve C defective
CPC valve B is faulty
A/T clutch pressure control solenoid valves A and B have failed
2nd checkball is stuck inside inside of the valve body is
Obviously, those are a number of potential problems that could take a lot of time and money to track down.
With the rising cost of used vehicles, interest rates and the cost of living, it makes more sense than ever to keep your current vehicle on the road for as long as possible. That’s why you might want to consider investing in a remanufactured Honda transmission. If the rest of your truck is in good working order, this could keep you on road for a very long time.
What Transmission Do I Have?

Companies like Street Smart Transmission completely reengineer each transmission so that it meets or exceeds the original specifications. All of the issues explained in this technical service bulletin are already addressed, and a significant number of upgrades are made to help the transmission exceed its original lifespan. If you would like more information about a remanufactured Honda, simply click here.