Will GM 200r4 work with factory floor shift location?

Ok, here's the deal....most 2004R transmissions come with the run of the mill governor which shifts out of 1st, 2nd and 3rd at a much lower RPM than us street guys like. The cars with the good governors are the Monte Carlo SS, GN and 442s. If you happen to get a regular 2004R you can modify the governor yourself basically for free if you know what to do. The trick is to do it before you get you tranny overhauled because you must remove the pan to get to the governor. In my case, I thought I would be happy with the standard governor but even though the tranny works great and gets tremendous gas mileage I would rather that it shift much later. All the high perf 2004Rs shift at 4800, 5500, 5800 RPM at WOT. That's not what I'm looking for but I would be happy with 3500-4000 at WOT. To accomplish this all you need to do is remove your governor or have a spare like I do. Actually I bought a spare 2004R for $27 and I plan to use the governor for my experiment. I can always put the governor out of my Barracuda back into the spare trans.
Once you have a governor that you can experiment with you look at the pics of the GN governor and disassemble yours and start cutting/grinding. These pics are just examples of a 2004R governors but don't show good pics of what and how much to trim. Once I remove the governor from my spare tranny I'll post some good pics of all the steps and the results.


A GN governor costs close to $200 and you can get rebuilt ones (modified) for less than $100. But why spend any money when you don't need to. Besides, you can actually tune your governor to your specifications. The more you trim the higher your shifts at WOT. So later this week I'll start this project.

treblig