Heres a mod that i did a while back that i have never seen done.I call it the double up tranny(no disrespect to rrp's slipper)Its a 3906 tranny with 2 2nd speed gearsets this photo was halfway through the conversion but to be honest i dont think it was worth the time.worked great but just a bit over engineered.I must have been planning to attach it to a small block chevy or something when i came up with that
.Its funny sometimes what goes thru your mind with a shop full of tools & nothing to do