What is the RPO code for a GM 4L80 transmission?

What is the RPO code for a GM 4L80 transmission?

The 4L80 nomenclature denotes that the transmission is a 4-Speed, Longitudinally mounted, and for 8000 lbs. vehicle weights. It’s RPO code is “MT1” and has been domestically manufactured in GM’s Ypsilanti and Willow Run plants.

How much does a GM 4L80E automatic transmission weigh?

The transmission typically accepts a 6.3 quart fill. It features a dry weight of 254 lbs. and can weight up to ~268 lbs. full. Like earlier automatics, the 4L80 features one line pressure tap available for testing and diagnostic purposes.

How to wire a 4L80E transmission to a GPIO board?

To wire the 4L80E transmission to the GPIO board, you need to make a number of connections: You need a minimum 4.7 Ohm (or higher resistance – up to ~10 Ohms), 10 Watt (or more) resistor (such as Digi-Key 4.7CWBK-ND, $1.67) on the pressure control solenoid wire from the trans connector pin D to the GPIO board’s pin 33.

What should the voltage be on a TPS switch?

The TPS voltage should be over 4.0 volts. Close the throttle again, and then slowly open it to WOT, observing the voltage reading. It should increase progressively and in a linear fashion. If it sticks or jumps or falls off at all while doing this check, that could mean a bad TPS switch and could be a cause of stumbling and driveability problems.

How to identify a GM 4L80E longitudinal transmission?

With all GM longitudinal transmissions, it is far and away easiest to identify them by the amount of bolts on the transmission pan. Only the TH350 and TH400 share the same number of bolts. So if you count the bolts and get 17 you can be sure that you have identified the 4L80E transmission.

Is there a successor to the 4L80E transmission?

The 6L80E, which is the successor to the 4L80E, has 20 bolts. If you are looking at a transmission and you don’t even really know where to start, you can look at whether or not it has any sort of computer control to it.

How to test the TPS sensor on a GM car?

In three simple test steps, you can find out if the TPS sensor on your GM car or pick up or SUV or Van is bad. You don’t need a scan tool, since all three of the tests explained in this article are done with a simple multimeter. Every test has step by step instructions that will make diagnosing the TPS on your GM vehicle a breeze.

What are the DTC codes for the throttle position sensor?

TPS diagnostic trouble codes (DTC’s) stored in the vehicle’s computer’s memory. P0121: Throttle Position Sensor Performance. P0122: Throttle Position Sensor Circuit Low Voltage. P0123: Throttle Position Sensor Circuit High Voltage. Really bad gas mileage. Transmission does not shift out of second gear.