Disclaimer:
I can't speak for Pro Converters. My comments about TCE are relevant to only 6 months ago. If things have changed then please correct me and I will edit (or remove) this post with up to date information. I've tuned with TCE and OEM convertors.
This below is fact. But whether it's an issue or is good as gold; that's up to your own taste.
You won't get a nice lock up in the lower gears with a converter from TCE. When I talked with them they were not using the OEM GM style frictions that allow for continuous slip. What happens is they shudder in the lower gears. To keep the NVH acceptable all you can do is disable lockup until 6th gear. Then you can command only a low load lock up. If you try to lock it up with moderate and higher load e.g. whilst still accelerating onto the freeway into 6th gear, it will shudder into lock.
When dealing with it for the first time it takes a bit of mucking around to tune it right. If you're tuner hasn't done one before allow a few trips back and forward before they get it dialled. The 2nd one they do will be quick. I've seen 2 tunes with the a TCE 2800 fitted from different well respected workshops and they just disable lock up all together. I can tell you, driving anywhere of substantial distance with a loud exhaust and no lock up gets real annoying real fast.
When I talked to TCE about the 6L90 converter re-stall mod the cost from memory was not that much. I can't remember how much as it's been 6 months but I remember feeling like it was good value.
