- Learn about common Chevy Silverado 2500 transmission problems
- Everything you need to know when shopping for a Chevy Silverado 2500 transmission for sale
- How and when to buy a remanufactured Chevy Silverado 2500 transmission
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Chevrolet Silverado 2500 Transmission Problems & Solutions
The Chevrolet Silverado 2500 & Chevrolet Silverado 2500 HD are designed with far more capabilities than the 1/2 ton Silverado 1500. From towing heavy trailers, to lugging around the extra weight of tools or a service body, these trucks have to perform. To make all of this possible, GM designed a pair of heavy duty transmissions: the 4-speed 4L80E, and the 6-speed 6L90. These gearboxes are loosely based on the venerable TH400, and they’re able to handle a lot of torque and strain. However, they can develop problems over time, which can cost you a significant amount of money. So let’s look at some of the most common Silverado 2500 transmission problems, and see how you can avoid them.
Common Chevrolet Silverado 2500 4L80E Transmission Problems
Failed Shift Solenoids
In order for the computer to control the hydraulic shifting systems, it sends an electrical charge through a coil of wire that’s wrapped around a plunger device called a solenoid. A total of 8 shift solenoids are positioned throughout the valve body, and it’s their job to direct the pressurized ATF/hydraulic fluid to the correct channel to actuate a gear change. If one of these solenoids go bad, you may experience slipping between gears, failure to shift, and a failure to shift into overdrive. To address this problem, every remanufactured 4L80E transmission by Street Smart Transmission receives 8 brand new solenoids that are pressure tested to ensure that they function properly. Next, a heavy duty recalibration kit is installed in the valve body, along with new heavy duty bushings, and an upgraded pressure regulator. All of this helps to stabilize the fluid pressure and extend the service life of the 4L80E shift solenoids.
There’s a bunch of moving parts inside your Silverado 2500 4L80E transmission, and its up to the transmission fluid to keep everything cool. Towing heavy loads, and the constant shifting that occurs in stop-and-go traffic and mountainous terrain can intensify the heat, which can cause the transmission to literally overheat. This can result in blown transmission seals, along with damage to the clutches, bands, and valve body. To keep this from happening, we recommend installing an auxiliary transmission cooler.
Common Chevrolet Silverado 2500 6L90 Transmission Problems
Torque Convertor Issues
The torque converter acts as sort of an amplifier between the engine and the transmission. It’s designed to translate the rotational force of the engine (aka ‘torque’), into hydraulic pressure that the transmission can use to turn the drive wheels. A series of turbine blades spin in conjunction with the engine’s flywheel, which turns a pump that provides the correct amount of pressurized transmission fluid needed to shift gears. If one of the elements go bad, you can experience erratic shifting, slipping, or no gear engagement at all. In order to prevent these problems, every Street Smart remanufactured 6L90 transmission receives a completely remanufactured torque converter that’s been updated to exceed the OE specifications. Some of these upgrades include a later style stator support shaft with higher quality seal rings, all surfaces of the pump have been machined to ensure consistent fluid pressure, and custom-spec bushings replace the weaker OE bushings.
How to Solve Chevrolet Silverado Transmission Problems
Solution A: Buy a Used Chevrolet Silverado 2500 4L80E / 6L90 transmission
Chevy Silverado 2500 transmission problems aren’t cheap to fix, so you might be tempted to just buy a used 4L80E transmission or a used 6L90 transmission from a junk yard. However, there’s no guarantee that it won’t have the same problem that you’re trying to fix now. Sure, most reputable salvage yards will give you a 30-90 day warranty, but it doesn’t cover the installation charges that you’ll have to pay for installing yet another used transmission.
Solution B: Buy a Rebuilt Chevrolet Silverado 2500 4L80E / 6L90 transmission
The next best solution would be to pay the extra coin to get a rebuilt 4L80E transmission or a rebuilt 6L90 transmission. These will typically hold up longer than a used Silverado 2500 transmission, and they usually come with a 1-2 year warranty. However, the quality and service life of each rebuilt transmission varies, based on the skills and experience of the tech rebuilding it. That warranty also may limit you to a specific number of shops, in a specific region. And it won’t do you much good if you have transmission problems, and you’re nowhere near an XYZ Transmission shop.
Solution C: Buy a Remanufactured Chevrolet Silverado 2500 4L80E / 6L90 transmission
If the rest of your truck is in great shape, but the transmission is holding you back, then you should seriously consider investing in a remanufactured 4L80E transmission or a remanufactured 6L90 transmission by Street Smart Transmission. Unlike a rebuilt Silverado 2500 transmission, these are produced in a factory, where each component and step must pass rigorous quality checks. Any ‘hard parts’ that don’t meet specification, like the valve body, gear sets, or torque converter are immediately replaced. Upgraded parts are installed, surfaces are machined, and the transmission is reassembled. Next, the torque converter is tested for concentricity and leaks, and the transmission is hot & cold tested on a dyno machine to ensure proper function prior to shipment.
Each remanufactured 4L80E transmission and remanufactured 6L90 transmission then receives a 3-year/Unlimited Mile Warranty (18-months/100,000 miles for commercial and heavy duty applications). Unlike a rebuilder’s warranty, ours will cover parts and labor at any licensed repair shop in the country. It’s also transferable, which allows you to pass on the coverage should you decide to sell your truck. To find out more about the Street Smart Transmission advantage, give us a call at 1-866-812-7560. Or you can click here to check on the price and availability of a remanufactured Chevrolet Silverado 2500 transmission.