How do you put trans fluid in a mtx tranny? I've loked all over and can't find any way to fill it!! HELP!!

 

rubber plug on the right side.
funnel, tubing, and a friend needed.

 

i take the reverse light switch out of mine and put it in there. IF your battery isnt in the way its alot easier.
just make sure its not in reverse or it goes in really slow.

 

is there a level indicator telling you how much fluid is in there? whats the best grade of gear oil to use?

 

The level indicator is the rubber plug on the side of the diff housing. Fill it till it runs out of that hole.
I was using penzoil synchromesh in mine and it seemed to shift even better. Gear oil (80w90) or similar is too thick.