Steve I believe all SSEi'* came with HD. The neat thing is 65'* didn't automatically come with a tranny cooler. So chance of failure is probably equal or greater.

not the earlier model bonnies. (UNLESS IT HAD TO SHOW HD UNDER THE TRANSMISSION PAN)

I have a 95 Bonneville SE w/ 3800 Series II. I want to do a direct swap with another series II and 4t60e trans. I know now that the electrical is quite different. Would I be able to get any 4t60e transmission (like this http://cgi.ebay.com/ebaymotors/ws/eB...984266331&rd=1) And do a direct swap without changing any of my current wires/setup?

That trans will not work correctly.

The easiest thing that you could do is to take and try to find a complete engine, trans, PCM and wire harness out of the same vehicle and modify as needed.

I have question why would you want swap a series I for Series II. I mean I like my series one but I will admit that series 2 has more power and better fuel mileage. It pretty much almost as reliabe as my series 1. That would be alot of work to do that. I a, thinking junk yard and hope for the best

I think the purpose of the swap is to have the more powerfull motor in the lighter car.

Who said anything about putting a series one in it? I need a 4t60e tranny becuase thats the one my car has. Why would that trans not work with mine, if both are 4t60 electronically controlled?

There were several revisions done to the 4t60-e when it was in production. That includes electrically and some random hard parts. So, there are differences.
That tranny is from a 3.1l engine and i'm next to positive that it has a 3.33 FDR instead of your 3.06, along with a different stall torque converter. Also it has an OBDII system controlling it instead of your hybrid OBDI/II system. That will defintiely give you trouble. The actual transmission case might actually be different too, since it'* from a w-body.