Working on it. Found a mouse nest. Twigs. Like big twigs. How the heck do twigs get up in there? Cleaned most of that out but not exactly certain where I'm looking (I understand the general area, just not exactly the location that the 1/2" x 2 stamping will be under the black hard burned oil/crap which means I have to clean my way down to bare metal. I'm assuming not under the engine tin, though..... I'll do some research tonight to see if I can find some photos of the exact location.
There is a BIG "However" though. For sure this is a 1975 bus. This photo below is from under the transmission. I don't have a lot of experience with 5 rib transmissions but would this not be a 6 rib transmission? (photo directly below is of my transmission from underneath):
![](https://lh3.googleusercontent.com/zZCsBbwDhSWRRHxCI4r2eaZ65NvisaUppmjeGXdShRg1TCmarwbpjxLrtuKdEzI98IxCPTL00_OXERwFD556hOUUpYZQdVZQIqWr2__FmQI3dL_SGjp9cLiAN1sFBBH6EEs7ggfe1DQ=w700)
I always am never sure what counts as the 6th rib, especially from underneath but compared to others, it seems like this is a 6 rib transmission. A classic 6 rib tranny photo I've seen that shows how the ribs look along the bottom and sure looks exactly like mine to my old eyes:
![](https://lh3.googleusercontent.com/lLuBDFOcwOzEiHqzJOOKJkSU7FwwJJ9HWI7NXPYB5v1esFpphbNwZQ3IPy5eI30EDeK-RWQgk5HVrjucDAWFF-PImzhf7EXbhHtlWln5SBz2Ae3qtH9TAT1bR1LiCeW2DY9WM1rw6lk=w700)
Anyone agree mine is a 6 rib transmission? (the first photo, not the 2nd photo as I'm using the 2nd photo for reference of what a 6 rib transmission should look like)
Thanks!