Warn Overdrive, Gear Vendors Overdrive, Ranger Torque Splitter

[Ben Framed]

Does anyone here know anything about any of these add-on overdrive systems? And, have any of you added one to your older turbo 400 transmission for your muscle car or truck? Or any other transmission for that matter.

https://www.motortrend.com/how-to/gear-vendors-vs-warn-vs-ranger-overdrives/