722.313 vs. 722.323 transmissions

According to germanstar.net,
AT 722.313 is in '86-89 560SL's and
AT 722.323 is in '86-88 560SEL's.

What are the differences between the two - ratios, case size/shape, mounts, linkage, stall speed, . . . ?

Thanks in advance,
M D Nugent
Renton, WA