Is there any motor swaps that will bolt up to a 2nd gen auto tranny? Maybe by means of advance adapters?? Before I go out and spend a buttload on a 3.0 I wanna consider my options.

 

Downey has a kit to mate it to the 4.3 and 5.7 I beleive...definately the 4.3 though.

 

I think some have bolted up a 3.4 engine without any adapters, but the transmission is driven by the ECU and the ECU also drives the engine so there may be a compatibility issue.

Try a search under user name "TeamShiftpoint", I think he has mated the 3.4 engine to the 3.0 auto tranny with good results.

 

Here is a couple of his swaps: https://www.yotatech.com/forums/f116/3-4-swaps-galore-pics-3-swapped-trucks-more-44908/

 

Hmmm....haven't saw anything on the downey site that adapts the toy tranny to the 4.3. Lets start here....how do I identify my tranny in it now? Get the dumb questions out of the way first...

 

Found a complete 2003 4.3 vortec with ecu and 4l60E tranny for $1,400 with 23,000 miles on it. Only thing is the tranny is from a 2wd. Would this give me any problems? I noticed downey sells a kit for $658.