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Does the 4L80E have overdrive?
The 4L80E is a truck automatic transmission that was introduced by GM in the early ’90s. It basically uses many of the same internal components as the TH400 but has an overdrive Fourth gear and uses electronics to control shift points, firmness and that sort of thing.
How many shift solenoids does a 4L80E have?
This set contains the two 4L80E transmission shift solenoids found in the valve body. It is recommended that you replace both of these solenoids at the same time as they tend to go bad together.
What controls a 4L80E transmission?
All 4L80E transmission use electronic controls; typically from the Powertrain Control Module. Some vehicles have shift maps that are selectable by the driver based on usage, such as towing. A portion of the PCM’s strategy is shift stabilization, which reduces hunting.
How many gears are in a 4l80?
There are five gears in a four-speed overdrive transmission: First, Second, Third, Overdrive, and Reverse. All of these gears have a clutch assembly that uses springs to keep the gear disengaged.
Is a 4l80 a good transmission?
The 4L80E is a descendent of the proven TH400 transmission design. It is very rugged, has much more potential for power capacity than any other overdrive transmission on the market. It has better power flow for big power applications, much more clutch capacity and apply area than the 4L60E.
Can you use a 4L80E without a computer?
The only logical transmission for our 4×4 was the 4L80E four-speed automatic transmission commonly found in 3/4- and 1-ton GM trucks and SUVs. However, the 4L80E can be easily converted to a manually shifted valvebody, which eliminates the need for the computer and much of the electronics and wiring.
What’s the problem with the 4L80-E no overdrive?
The most common problem facing the 4L80-E NO OVERDRIVE and how to deal with it. Not open for further replies. If the problem is electrical then chances are you can troubleshoot the problem yourself. The torque converter has a torque converter clutch. It is this clutch that provides the mechanical coupling from the engine to the transmission.
What to do if your transmission is not going into overdrive?
There is another check you can do if you are not going into overdrive. It is the Transmission Fluid Temperature Sensor. DTC 79 is transmission fluid Overtemp. A defective temp sensor will prevent overdrive. Use a multimeter between pins L and M to check for resistance.
What kind of transmission does Hydra Matic 4L80E have?
The Hydra-matic 4L80E is a 4-speed automatic transmission which uses electronic control for smooth shifting. It offers a fourth gear overdrive to increase fuel efﬁciency. A torque con- verter clutch automatically engages at cruising speeds to improve fuel efﬁciency.
When did GM start using the 4L80E in trucks?
GM started using the 80E in 91 on the 3/4 and one ton trucks. Before that was the good ole TH400. 93 was the first year for the 4L60E. Sounds very doubtful that it is a major internal hard part.