I have an 85 Chevy K20 6.2 diesel, 4spd manual with a gear vendors O/D. It works great and i have never had any real issues with it other than the fact that whenever I go to shift out of O/D the gear vendors makes a loud banging noise that i can feel throughout the whole truck. I bought the GV brand new and it has done it all its life. I am very good about changing the oil on it too. Does any one know if this is normal? From what I have read nobody else experiences this with their Gear Vendors OD.