Disclaimer: The following is provided as a GUIDE ONLY, and neither myself nor Ozhonda take any responsibility for the outcomes of someone else doing the following. You follow these steps at your own risk!
Aim:
Service/Replace gearbox fluid in a b16a1 gearbox (y1 trans?) [And i know wynode already has a gearbox removal DIY that tells how to do this but i thought I would create a thread specifically for fluid changes to promote discussion]
Required:
2ish litres of honda MTF gearbox fluid (i purchased 3L just in case)
drain bolt washer
filler bolt washer
WD40 or something similar
Car ramps or jack and jack stands
1/4" drive ratchet
17mm spanner/socket and maybe extensions
Tubing and funnel
Phillips head screwdriver
Pliers
Steps:
Replacing the fluid in a gearbox is similar to doing a oil change for the engine. There is a gearbox drain plug/bolt and a filler plug.
1) Put your car on ramps or jack it up and locate the gearbox drain and filler bolts.
2) Unbolt the top bolt, the filler bolt with a 17mm spanner. This can be a hard bastard, so a hammer onto the spanner and some WD may be needed. Be sure to have a bucket or something to catch the fluid that will come out. Eventhough this is the filler bolt, because the car is on an angle fluid will come out of it. Then place a ratchet onto the bottom drainage bolt and let all the fluid flow out.
3) Now pop the hood and remove the intake pipe.For my b16a all that was needed was to undo the clamp to the throttle body, unclip and pull out the two airlines to the intake and slide the pipe off the induction box.
4) Wait untill most of fluid has drained from the gearbox, and then get the new washer and the drain plug and bolt it back into the gearbox tight.
4) Now get your rubber tubing, I used some left over 9mm silicone vac hose, and drop it down through the engine bay. then put one end into the filler hole and have the other end attached to a funnel.
5) Now either roll your car off the ramps in Nuetral with the engine off or jack down your car. Do this so your car is level so you can get the correct ammount of fluid into the gearbox.
6) Now make sure the hose is in the filler hole and poor fluid into the funnel and let gravity take it into the gearbox. It may take a while for the fluid to drain down.
7) Now either watch under the car or keep an eye on the filler whole. When fluid begins comming out of the filler hole you know you are done. My car took around 2.1 litres. So then bolt in the filler bolt with the new washer from the top of the engine bay so the car is still level.. get a skinny mate to help you.
8) You may wish to then put your car back on ramps or jack it back up. I was able to do the bolt a little tighter from under the car.
9) Be happy
Other comments
There are other methods to filling the gearbox, such as removing the VSS and pouring it through there. I found this way the least hassle though. Fairly easy task and only cost the max of 40 bucks using gen honda parts
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