4l80e transmission6/21/2023 So here are the most common 4L80e transmission problems. Users have reportedly made complaints about the 4L80. While the 4L80e is known for its power and reliability, it’s not flawless. What are the common problems of the 4L80e transmission? That said, here is a detailed list of cars that saw the 4L80e. The GM 4L80e transmission also found its way into several vehicles like the AM General Humvee, Isuzu, W-series, G-series van, and workhorse Chassis trucks throughout 2009. However, even with this development, the 4L80e still featured in GM’s truck, in fact, in 2007, it was outfitted to the Yukon XL and Suburban with the 6.0-liter engine. GM, in 2006, with the upstart of the later 6L90e six-speed tranny started replacing the 4L80e in several applications. The transmission was also fitted into luxury vehicles like Aston Martin, Royce, Jaguar, Bentley Royce, and other less stunning applications like vehicle homes and school buses. In 1991, the 4L80e was outfitted to GM trucks like the Sierra, Suburban, Silverado, and even the Hummer H1. But here is how to identify a 4L80e transmission while the 4L80e comes with four pinion gears, the 4L80 uses five. So the 4L80e transmission identification may be tricky, though possible to spot. With the PCM activating and deactivating the solenoid in a preset pattern, four gear ratios are established.įurthermore, the 4L85Ee was produced in 2002 alongside the 4L80e, hence, appears similar. However, to conform to the OBD II regulations, they were later changed to 1-2 and 2-3 solenoids. The 4L80e features two shifts of solenoids formerly known as the Shift A and Shift B solenoids. But, the indexing bore diameter got changed. For the tail housing in the back, the bolt pattern still was the same. The addition of overdrive led to the increment of the 4L80e transmission case-about 1½ inches longer than the TH400. As stated above, the 4L80e used most parts of the TH400 but added overdrive gear, lockup converter, and electronic controls. General Motors wanted a powerful automatic overdrive, hence, the introduction of the 4L80e. However, while the 700R4/4L60e performed excellently, they were not as strong as the TH400. The need for an overdrive and lock-up torque converter led to the production of the 700R4 transmission, later upgraded to the 4L60 and 4L60e. The TH400 no doubt had no lock-up converter and overdrive, in fact, it was the last GM transmission built without an overdrive and lock-up converter. However, one cannot completely talk about the 4L80e without involving the powerful TH400. The transmission also features a 32-spline output shaft in both its two-wheel and four-wheel drive applications. GM’s 4L80e transmission uses one pressure which comes in handy in testing and diagnosis, plus cooling transmission ports for external transmission coolers. Without the transmission fluid, the 4L80e weighs 254 lbs, but with transmission fluid, it weighs up to 268 lbs. However, GM, in 2006, recommended the Dexron VI outfacing the Dexron III. The 4L80e transmission fluid capacity lurks at 6.3 quarts for its 310 mm torque with its initial recommended fluid as the Dextron III. The 4L80e is 26.4 inches long and features 17 bolts. The 4L80e featured a die-cast aluminium case which accounts for its sturdiness. Manufactured by General Motors in 1991, the 4L80e was used to replace the strong TH400, which was first built in 1964, though with additional upgrades. It has a maximum input torque of 440 lb-ft and a maximum output torque of 885 lbs-ft with a vehicle weight rating of 800 lbs. The 4L80e uses four forward gears and one reverse gear in the following ratios! First gear:2.48, second gear:1.48, third gear:1:0, fourth gear:0:75, and reverse gear:2.07. So technically, the 4L80e is the heavy-duty version of the TurboHydramatic TH400. The only difference is that the 4L80e featured additional upgrades like an overdrive gear, lock-up torque converter, and electronic controls. It was built on the same platform the ever-true and tried TH400 was built. The 4L80e transmission is a four-speed, electronically controlled automatic transmission built for longitudinal engines. Image credit: 4L80e transmission explained Follow us as we unleash more interesting information about the 4L80e. Here, we will discuss how the transmission evolved, the cars it’s fitted into, common problems, and solutions. Technically, there is more to this transmission, and that’s why we’ve put out this article together. The transmission is known for delivering much power and can even be tweaked to grace more power. And if you’re driving one of GM’s trucks like Sierra, Silverado, or Suburban, chances are you have the 4L80e. The 4L80e transmission is one of the strongest and most reliable high-performance automatic transmissions built by General motors.
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