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A Hydra-Matic 4L80 transmission at the Ypsilanti Automotive Heritage Museum. The 4L80-E (RPO MT1) is rated to handle engines with up to 440 ft·lbf (597 N·m) of torque. [2]
The 4L80E (and its successor 4L85E) was the first Hydramatic to incorporate electronic controls — almost all of the THM400/3L80/3L80HD's components are interchangeable. Transmission fluid cooler line connections are found on the right-hand side of the THM400. The lower connection is the cooler feed, and the upper connection is the return. [1]
Designed for transverse engine configurations, the series includes 4 gear bearing overdrive [1] [2] 2 electronic shift solenoids, and electronic force motor to control line pressure. [ 3 ] The 4Txx family is an evolution of the original Turbo-Hydramatic 125 transverse automatic introduced in the 1980 model year "X" body.
4-speed 4L80E automatic 5-speed HM290 manual ... The upscale Denali trim line for the Yukon was introduced in 1999. ... and a tire-pressure monitoring system. A new ...
There is much speculation as to why the Isuzu chassis was ditched. Some believe that the engine was under-powered while others mentioned the cost vis-a-vis the dollar/yen exchange. Either way, the Trek was now utilizing a GM Chevrolet P30 chassis with a 454 V8 gas engine linked to a GM 4L80E transmission. Also available was a GM 6.5 liter turbo ...
Electronic control of shift pattern (when it shifts), shift timing (how long it takes to shift), shift quality (shift feel), line pressure, and TCC apply and release rates were all affected by the cold temperature performance of the ATF flowing through solenoids. In 1990, DEXRON-II (E) (GM Spec GM6137M) was released.
Next, the flow follows the Fanno line until a shock changes the flow from supersonic to subsonic. The flow then follows the Fanno line again, almost reaching a choked condition before exiting the duct. Figure 5 Fanno and Rayleigh Line Intersection Chart. The Fanno flow model is often used in the design and analysis of nozzles.
Introduced as a performance engine in 1967, the 350 went on to be employed in both high- and low-output variants across the entire Chevrolet product line. Although all of Chevrolet's siblings of the period ( Buick , Cadillac , Oldsmobile , Pontiac , and Holden ) designed their own V8s, it was the Chevrolet 305 and 350 cu in (5.0 and 5.7 L ...