im having trouble identifying this transmission. i believe its a 67 olds jetaway id# 67MM178D. dont know what the other M is stands for though. any answers?

 

The 40th edition Hollanders Mechanical lists this code on p 94 of section 11. MM: Jetaway late '67 Olds F85 (8cyl w/4BC) and '68-'69 Olds F85 8-350. Also reads that it was used as a replacement for both "MK" and "NJ."