transmission?

Please call a dealer most do have a dip stick/tho there are several makes/ models that don't. Safty first. Anna Taylor

if u refer to owners manual, there is a fill plug on the side of transmission, accessed from under vehicle, remove fill plug and fluid should be added until it overflows from hole, replace plug and drive vehicle, it is a serviceable transmission.

All transmissions need proper servicing. The newer transmissions on the Honda Passport were made with a fill hole instead of a dipstick. SERVICE YOUR TRANSMISSION NORMALLY!