what size/length are the bolts between the transmission and rear plate at the bottom. my 2 are kind of...non-existant

 

All the tranny bell housing bolts should be 14mm heads... I don't know the thread pitch measure tho. Just take out one of the other bolts, make sure it fits and take it to a hardware store to compare. Just make sure you buy one of equal or better hardness.

 

i've got a place that just sells all sort of bolts nuts etc so i'l grab all high tensile. thanks