I recently purchased a 1994 Mazda b3000, 5 speed manual transmission its a nice little truck and I have had no problem besides my hoses and my gaskets are all starting to go but what can you do the truck is nearly 30 years old, I have a small transmission leak and I wanted to try and see how much fluid I had and if I needed to and any, I could not get the fill off so I saw another smaller bolt to the side of and the same level as the fill, I removed it thinking if I added some transmission fluid It would pour out when I had enough fluid in the transmission but that never happened, so I eventual got my fill removed and I drained the access fluid, but when I went to place the small bolt back in it just will not seed completely, and I am hoping what Removed wasn't something important and maybe a part that is supposed to add tension on a component in the transmission, the transmission runs fine and I am able to drive it, I am wondering if anyone here knows what I took off, I have been unsuccessful on finding any useful diagram or schematic that could shed some light on what the part is
Thank you for your time.

 

Welcome to the forum

Sorry I looked at a breakdown and I cant figure it out?? We do have a couple of members that are well versed in that model Mazda sop hang on.

As for the bolt, your thoughts may be correct if it is a specialized bolt and not just with threads as a normal looking? If it did have a purpose, there should be parts you can see inside the threaded area. Take a light and look. You have also inadvertently damaged the tread reinstalling it? So look at the threads again?
Other than that, wait for and experienced member with B series Mazda Trucks/pickups.


specialized bolt

 

A 1994 Mazda b3000, 5 speed manual transmission is really a Ford Ranger made in USA, so search such forums. Most here are experienced with 1986-1993 Mazda trucks which were made in Japan.

There were 3 engine sizes for 1994 Rangers, B3000 is the middle size.