Reply to thread

Message: <blockquote data-quote="ORVietVet" data-source="post: 23775" data-attributes="member: 9438">4 groove or 3 groove mean that the splines on the shaft of the steering gear and the splines of the pitman arm have a fat spline to help determine where to install the pitman arm. When you take the pitman arm off the steering gear you should have the steering wheel centered and tires pointing forward and a fat spline of either new arm lining up with the positioning of the old pitman arm. I would bet that the 4 groove spline will be the correct pitman arm."The main difference between a 3 Groove and a 4 Groove pitman arm is the number of Grooves carved on them. Pitman arms are responsible for connecting the steering box to the steering linkage, also known as the drag link, and transmit the motion of the steering box to the linkage.A pitman arm with fewer Grooves will have a more reactive response than a pitman arm with more Grooves. A 3 Groove pitman arm is ideal for vehicles that require a more sensitive steering response, while a 4 Groove pitman arm is best suited for larger and heavier vehicles as it provides a more stable and smoother steering feedback."</blockquote>