[waialua359]

Originally Posted by AlecS

The roll pin referred to here is for replacing the #4-40 DOG shifting screw that goes through the dog. While the high-strength #4-40 screw that comes with the gearbox is plenty sufficient for shifting in drives, some teams using previous dog shifters, or shifting dogs for things other than the drive have had issues with the dog screws bending. The .125" roll pin has a much higher shear strength than the #4-40 screw, so replacing the screw with the roll pin will allow the dog to take much higher loads than before.

In the drivetrain, there is no real advantage using the roll pin. However, for teams making things like kickers, or other high load gearboxes, the .125" roll pin could prove to be a significant advantage.

We have had some bad experiences of failure due to setting up an automatic transmission in the past. Even with the recommended changes, I would have to hear from other teams about its reliability first, before we ever do it again vs. manual shifting when needed.