The pitman arm is a key part of any steering system involving a steering box, since it’s literally the part that bolts to the output shaft of the steering box. So here are some details about various GM pitman arms and why we use the parts we do.
In the GM squarebody (and even earlier) world, the 4wd trucks use a different steering box output shaft and pitman arm arrangement than 2wds. On a 4wd, the pitman arm points to the side of the truck and the draglink runs toward the back of the truck to the steering knuckle. On a 2wd, the pitman arm points straight back and moves the centerlink side to side to move the tierods to steer the tires.
Here’s a question we get all the time: “What axle gears should I use for my combination?”
Obviously there are a lot of engine, transmission, tire size, vehicle weight and intended use combinations but here are some general guidelines and specific recommendations.
In general we like to gear a lifted truck to run more RPM rather than less. Usually a lifted truck ends up with bigger tires, exterior accessories that add aerodynamic drag, the lift itself adding aerodynamic drag and often bigger axles, transfer cases and transmissions that make our power requirements greater. Your typical lifted K5 Blazer can very easily end up with the equivalent load of a loaded down pickup so we tend to look at gearing systems for heavier rated factory trucks or towing packages for lighter rated factory trucks. The big thing you see is that they’re geared deeper, no big secret.
The first thing to consider is if you...
We are working with a second generation Kevlar reinforced polyurethane bushing material that is proving to be another step stronger and more durable. At this time the new material is only available in the same grey color as our Kevlar tierod end boots. Due to shortages in all our materials we are not able to offer most of our kits in all grey or all black for immediate shipment. If we ship at regular in-stock timing you will receive a mix of grey and black and we have very limited control over what bushings are what color. We understand some of you are working on some super good looking truck builds and we don’t mind a bit doing all we can to make our stuff match for you. To help you keep it all looking matched up we are offering the option to hold your order and ship all black bushings as they are available. This option will be a mix of our Kevlar bushings and regular polyurethane but the colors do match and will be all black. T...
Below is a customer question about leaning springs and what to do to remedy the situation. We figured it could be helpful for many people:
A lean is fairly common and is a byproduct of a soft spring and kind of unique to this truck platform because the front springs’ mounting width is fairly narrow. A small difference in the height of the springs can make an exaggerated difference in side to side height and a small weight difference can also also cause an exaggerated ride height change. To put some numbers on it, the springs are about 32” center to center and the outside of the body where you see and measure is about 80”. The body has about 2.5:1 leverage over the springs so a ¼” change at the spring pad should convert to 5/8” at the body line. It also works the opposite for weight, any weight change has a big lever arm over the springs and makes itself look way bigger than it should.
We have yet to have a spring problem that was causing a lean so I’m betting your...
Best Way to Setup Your Steering Gearbox For Hydo Assist
Recently we were asked about the steering box end caps and why we don't offer a tapped one for hydro-assist. Since this is an often asked question we figured the answer could help a few others out as well!
"I'm planning a hydro assist conversion using the part below (tapped end cap for steering gearbox), tapping the other hole for the system in the aluminum cap on the top of the steering box (there's a link in his description to a video on youtube where a guy does this on a jeep). If you made a part like that, I'd buy it from you. Is there a specific reason that you don't make that, or wouldn't recommend it?"On the hydro...