Stronger Steering:Īll Duramax powered trucks use independent front suspension which provides a smooth ride, but as a result, oversized tires and increased horsepower will put extra stress on the front steering components. One interesting note about the GMT900 platform: for the first couple years, the chassis was almost identical to the earlier GMT800 trucks, which is why you see so many steering and suspension parts that fit 2001 to 2010 trucks, which overlaps both body styles. In 2008, GM rolled out a new body style which was a huge departure from the classic looks of the previous generation, and there are plenty of Duramax performance upgrades available for this body style as well. Any high mileage Allison transmission can benefit from replacing the factory lines as they are known to become brittle and leak. The kit comes with everything you need to adapt your transmission, radiator, and fluid cooler to the AN style fitting which makes installation a lot easier, and the lines will last a lifetime and ensure you have no more transmission fluid leaking out. The best bet if your transmission cooler lines are leaking is to eliminate the problematic stock lines altogether and replace them with a hydraulic hose style transmission cooler line kit from Fleece Performance. As the miles and age increase, the old rubber has a tendency to get brittle and leak or sometimes even burst which can leave you with a messy driveway or in a worst-case scenario, stranded on the side of the road after all the ATF is pumped out. The original lines are made from aluminum tube, but they have short sections of flexible rubber hose in the middle, and the two are connected with a crimp. In order to help the transmission fluid run a little cooler, often the first upgrades to the Allison are a deep fluid pan and a larger external cooler, but it’s easy to forget about the stock cooler lines. Upgrading any vehicle, including a Duramax powered Chevy HD, with a Red-Head Gear Box will make a very noticeable difference in your steering. Combined with their precise quality control and ultra-stringent core selection, a Redhead Steering gear box will provide a much tighter and more precise driving experience for your Duramax powered 2500HD. Red-Head is an American made company, and their manufacturing process involves several unique steps like adding needle bearings into the housing and fitting custom sized ball bearings into the worm gear assembly to eliminate play. The best solution for your Duramax steering problems is a Red-Head Steering Gear Box. If you have to saw back and forth on your steering wheel simply to maintain a straight line down the road, chances are its shot and needs to be replaced, but if you go to a parts store and grab a simple remanufactured box, chances are the replacement will be of a lesser quality than the original and your symptoms may not improve. If you’re driving an early 2000’s Duramax LB7 or LLY, one of the most often neglected and frequently worn parts of the chassis is the steering gear box. Upgrades for these engines are plentiful, and the best part is the GMT800 body style is pre-emission, which means you can have a little more leeway with your engine upgrades, but the bad part about the aging chassis, is they often have a few maintenance items which need to be taken care of before horsepower is added. Over the short run of the GMT800, it was home to three different versions of the Duramax, the LB7, LLY, and LBZ. The GMT800 platform ran from 1999 to 2007 and is a classic body style which still is a favorite of enthusiasts today. To help point you in the right direction, we’ll go over some essential upgrades for the Duramax, based on the body style of truck. Whether you want to upgrade the injectors in your LB7 for more power or throw a better turbo on your LML to control EGT’s the options are nearly endless, but it can be hard to figure out where to start. The Duramax powered Chevrolet Silverado or GMC Sierra is one of the most upgraded diesel trucks on the road, and you can build one to fit for nearly any purpose, whether that’s racing, hauling, or even off roading, but for most of those disciplines at least some upgrade to the Duramax will be needed.
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