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I've searched for a long, long time, and here's what I've found (disclaimer - I don't know everything).

I have never found the v5mt1 behind a 4d56 or 4g54. I found the v5m31 behind the 4d56 in Europe.


My 4d56 came with a V5MT1 behind it. It's a beef tranny, but Prob not good for street performance use. It's a "truck transmission" for sure.


87 Raider 4D56td v5MT1
31's..Basically Stock