Hey all,

Recently this past month I’ve taken the project of rebuilding my transmission.

Some Background: I’m rebuilding the s40 that came out of a 1999 honda civic dx hatchback

The engine is d16y7 (non vtec) and 1.6L obd II



This is the first time I’ve rebuilt a transmission. I took my trans out when I first bought the car I thought the clutch or something was making a bunch of noise, shortly after I replaced the clutch the noise was less but was still there. It was the input shaft bearing. So, I took out the trans and brought it inside. I started taking it apart, removed the interlock guide bolt and I separated the case half’s, pulled out the main shaft, countershaft, and fork assemblies. Then I replaced the countershaft bearing, main shaft bearing, diff bearings and oil seals. I now have the main shaft, counter shaft, fork assemblies and diff back in and I don’t know how the orientation of the “change piece” goes. In my helms it says “set the change piece” read a little bit further and it says “NOTE: Align the finger of the interlock with the groove in the shift fork shaft.”

What does the alignment look like? They show no pictures.

Also, when do I put the interlock guide bolt back in. Everywhere I read tells me first bolt out last bolt in. But does everything need to be in neutral first? Should It be in second or third gear so the trans closes then put it in? Another thing is everyone says just put it in when its an “empty” hole or has nothing on the left or right of it that would obstruct the bolt.

Lastly, how would I bench shift my trans? I have a screw driver through the nub that the linkage bolts onto but it’s so hard to pull backwards and push forwards, surely it’s gotta be something with the shift forks orientation. Also a side note is that the main shaft does spin freely so there is no binding.

Thanks all to who respond I’m just trying to figure this out

If at all possible if someone have a picture for orientation so I can compare to how my trans looks and go from there.

 

 

Another image i found, it's a b series transmission but I assume its the same. Is this the correct orientation?

 

Line the shift fork tabs up and the interlock and interlock guide slot into them, it does not matter how as long as they're all slotted in. The interlock guide bolt goes in last. Look through the hole and make sure the interlock is lined up so you see airspace for the bolt to go into. If there isn't airspace and you see metal, the bolt will hit it, damage it and you'll have shifting issues and gear lockout.

 

so it doesn't matter if all the gears are in neutral just as long as there's no obstruction for the interlock guide bolt when it goes in. Right?

 

It will be in neutral when its lined up correctly.