As I have a 3500 4x4 gas truck sitting not being used and a fair way from being able to be used I'm thinking about breaking it for parts (need the space) what is the difference between a 46RE and  a 47RE, trans on the cummins should really be done so I was thinking would it be possible to do the 46 to like dynamics stage 3 trans and its then a 47 ? Or am I missing something. Just read that the trans are basically the same just higher torque rating on the higher 2nd number. Would do the full works think it works out to around 5k. Importing a done trans isn't really feasable due to taxes and shipping charges and core charge

call John and ask him, he knows best.

 

typically the case is very similar and the internal hard parts vary, that said, the increase in sizze of some parts warrant a case change.

There are a myriad of differences: bell housing bolt pattern, clutch count (all except forward clutch), band lever ratio, planetaries (all 3), line pressure curve, TV pressure curve, shift points, etc.

Thanks for clarifying, was worth asking the question. I'd say no chance at all of a core over here to build at my leisure so will have to come up with a plan B