I have been running a Gen2 steering box in my 89 LWB Montero for the last 2 years. In that time I broke 2 pitman arm stubs off. Both stationary so thank god no disasters. I pulled a Gen1 gear box and pitman arm and compared them side by side. the Gen2 pitman arm is just under an inch longer. I am assuming this is causing the front end to bind up causing excessive wear and breaking of the pitman arm. I looked at changing the pitman arm for a Gen1, but the splines are too different to work. Sucks, but I guess without some more reverse engineering, Gen1 steering boxes are the safest route to go when your old one fails... Just a heads up to those people who have done the upgrade.