Mating a 4L60 to an NP205 (part of my 5.3 swap)

[Thealien]

I will include this in my build thread but thought some of you may be interested in what is needed to mate a 4L60 to the NP205 transfer case usually found in our trucks.

Here is my original adapter next to Advance adapters part number
50-5302



Which is part of
4L60205 You save about $90 buying the whole kit. Due to poor understanding by the Techs at advance adapters I bought the kit piecemeal

Here you will see their 4 bolt to 6 bolt adapter part number
50-0405 will not fit on the stock adapter.



This was in their instructionsbut nowhere on their site and none of their techs informed me of this even after numerous conversations?



Here are a couple of pictures showing some of the differences. I do believe you could alter the stock adapter with a cut off wheel on a grinder as it seals against the first flat spot/shoulder and not anywhere on the part you would have to cut off.
I figured aluminum would be easier to work with so I opted not to cut mine and sell it to offset the cost.

Their adapter



Stock adapter



Now you will see even their adapter doesn't fit 100%. If you cut the flange off the stock adapter you would not have to deal with this. If you use theirs you will run into this. The VSS will not screw into the adapter due to this flange!



So I made a modification