This may be common knowledge but I didn't find anything using the search function. Here's a link to the product, part # RM-9070 https://www.holley.com/products/drivetrain/bellhousings/bellhousing/parts/RM-9070 I watched a YouTube video on Jay Leno's channel where they had a Tremec rep speaking who referenced QuickTime bell housings. This was the only automatic one for Buicks that I saw but there are also several BOP housing for manual transmissions. I didn't see one for a 4L80E though, only the 4L60E. Link to the YT video on Jay Leno's channel: https://youtu.be/VNSbXR4x5WA Sent from my iPhone using Tapatalk
Are looking only at bell housings? There are adapter plates that serve the same purpose. I use an adapter plate and shimmed TC without issue with my 455/4L80e pairing.
I figured a bell housing would be more robust but it will be a while before I'm looking at a trans swap. There's much to do before I get to that. At any rate, I thought I'd share with the folks here. Sent from my iPhone using Tapatalk
Unlike the 4L60E and 6L80E the 4L80E has a one piece transmission case. The bell housing is not removable.
This is good information but all depending on price point and build, an adapter plate is an effective solution. It is simply a good consideration.
