Slowly pull up to work the top case away from the bottom case.

Make sure no internal components come out with the top case. However, there are bearings installed in the top case that may stay with the bottom half of the case.

Completely remove the top half of the transmission case. You may have to "walk" the top half of the case off of the shafts it is slotted through.

Reinstallation tip: Scrape off old gasket before putting the transmission back together. Use a Scotch-Brite pad to remove any stubborn gasket from all mating surfaces, and do a final cleaning with isopropyl alcohol.

Be extra cautious to not let any old gasket fall into the transmission case oil basin, as debris could potentially harm future performance.

Reinstallation tip: When reapplying liquid gasket to the transmission case, run a 2-4 mm bead along all gasket mating surfaces on both the left and right transmission cases. Use HondaBond 4, ThreeBond 1216, or an equivalent liquid gasket. Reassemble both transmission halves within 10 minutes of applying the liquid gasket.

Reinstallation tip: If necessary, use a mallet to lightly tap the right transmission case until mostly flush with the left transmission case when putting the two halves back together.