Open the drain screw at the bottom of the gearbox hydraulic fluid is discharged.
There is no drain plug.
On the end of the transmission.
From the transmission bolt ,with the square cut out in it Just be careful
you pull the drain plug on the side of the transmission
Replace the transmission fluid from Honda Dealer.. simply drain from drain pitcock and refill. The damage may be to much at this point pending how many miles you have. There is no transmission filter to deal with. Worst case it may give you a little while longer on the transmission. ...this is assuming you have an automatic trans, that was not stated in the ? Honda automatic transmission are a weak link in their automobiles.
Automatic Trans: Right side (passengers side) at the bottom rear of the transmission housing.
Replace the gasket with a fiber gasket.
The drain plug is located on the passenger side of the transmission, remove the front tire to access it. A 3/8" drive extension will fit in the plug, use a ratchet to turn it out.
The transmission drain plug is on the bottom of the tranny, underneath. You will need to lift the car up. there is no trans filter.
The service on that vehicle is very easy. On the bottom of the transmission there is a drain plug. Pull that plug out and wait for the fluid to drain completly. Reinstall the plug and fill with HONDA transmission fluid that you buy from the dealer. the filter is not serviceable on this vehicle so dont worry about it. Macs Transmissions 281-394-4951 Macstransmissions@gmail.com
I recommend only Honda genuine Z1. About 3.5 quarts on a drain and fill
drop trans pan with drain pan under the trans