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emperorbrownsuga

1999 Lumina 3.1 subframe swap with a 3.8

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Basically I have the same common problem with the 3.1 head gasket blown and debating possibilites and ease of swap the whole 3.1 sub frame with a lumina LTZ or similar subframe. Anyone have an idea if both subframes have the same bolt pattern and mount locations? Yes i am aware of the wiring and ECM differences. However, would the 3.1 tranny controller work on the 3.8 tranny? thanks appreciated.

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Yes, and no, I cant imagine that a 4T60-e PCM will control a 4T65-e tranny. If you are going to swap you have to take it all.

 

Yep, Just get the PCM with the wiring harness and youll be all set

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