I'm new here. Just curious, but what is the story with these older transmissions? My cars will never be show cars, so I don't have a need to keep them original for "value" or "show." I'm pretty sure all the engines and transmissions in the MGAs my dad had are somewhat original, except for swapping a 1500 for a 1600 engine. I don't know why, but the previous owner of the TR-3 said he put a TR-4 transmission in it back in the '70s. Other than catastrophic transmission failure, would there have been a reason to replace the TR3 transmission with a TR4's? I hope your wait isn't too long and you enjoy the new transmission.