4r70w to aod
It will bolt to the engine if it's a 4.2, but you won't have a speedometer, odometer, it won't run right, and you may also have driveshaft issues. It won't even shift right without a TV cable.
That would be about the most expensive route. Getting an inexpensive stock rebuild from someone who knows how to do it or taking your chances with a used transmission that comes from a quality yard offering a warranty would be the least expensive.
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With the right plate you can adapt any transmission you want. The problem is getting a custom plate made that WORKS probably costs more than the right transmission would cost.





