So im wanting to swap a 2000 1.9 tdi from a beetle into my rabbit. Would i have get the tranny from that and put on my car or would my old one work with the tdi. Also wondering how much it would cost to do the swap. Any help will help. Thanks.
Yes you probably would need to swap trannies, but you also need all the wiring looms from the Donor, and any ECUs that it takes to run it.
Costs depends on how good you are at electrical and doing wiring looms, and your Mechanical Skills, as well as body mods.
There are threads on the VWvortex here where folks did this.