The tranny in the 230E is a 722.401. The tranny in a 190E 2.3 is a 722.411. Externally they are about identical. I would say that they would interchange. It is concievable that the output flanges could be different, but they should be changable one to the other.

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Steve Brotherton
Continental Imports
Gainesville FL
Bosch Master, ASE Master, L1
33 years MB technician