Honda 1998 v6 engine automatic transmission slips out of 2nd,3d, goes in 4th if go to neutral and back to 4th at 30mph okay till slows up and drop out of 4th gear

SOURCE: transmission problems

Yes, it could very well be a bad transmission.

SOURCE: 91 Honda CRX Automatic Transmission Slips

I don't know much about cars, but I've got a service manual for your care in case you need one. It's BIG, 300mb.

Let me know if you need it.

SOURCE: 1998 honda accord transmission goes into limp mode

the vehicle may have a electrical problem and or mechanical problem in the trans....id try replaceing the solenoids and then the entire transmision and torque converter.

SOURCE: I only have 3rd and 4th gear, 1st 2nd and 5th are

Purchase a gear shift repair kit for your car. They are pretty cheap. About 20 bucs. The ball and bushings are probably worn.

SOURCE: 156,000 mi./automatic transmission slipping/slow to change gears

Nope. There is a drain plug on the transmission case. It is a simple drain and fill. Odyssey transmissions do not have a filter.