What is a manual lever position sensor?
The MLPS or manual lever position sensor is one of the vitally important inputs to the transmission control unit (TCU) of a vehicle with modern computerized automatic transmission. That way when you move the lever, it moves the switch to the appropriate gear range.
What controls a 4L60E transmission?
On the 4L60E, however, it is strictly a PCM programming function. You may be able to hold gears down by using the shifter, but you cannot cause the up-shifts to occur before the PCM commands it. In the 4L60E the up-shifts are completely controlled by the PCM.
Is the 4L60E manual?
The 4L60-E is a fully automatic rear wheel drive transmission. This unit is basically a THM 700-R4 with electronic controls added to the valve body. The shift pattern is controlled electronically with 2 shift solenoids that recieve a ground signal from the Powertrain Control Module (PCM).
Where is the manual lever position sensor?
The TR sensor is located on the outside of the transmission at the gearshift selector lever.
What are the symptoms of a bad transmission range sensor?
Symptoms of a bad transmission range sensor:
- The car doesn’t start and will not move.
- Transmission shifts into an unexpected gear.
- The vehicle will go into limp mode.
Does the PCM control the 4L60E?
The answer is the PCM is in complete control of every aspect of when and how the 4L60E shifts, Line Pressure and Lockup.
What causes a 4L60E transmission not to shift?
4L60E No Movement in Any Gear The most likely cause of this is either a total pump failure or a complete loss of fluid. This could be due to a significant leak, so if the car has been stationary for a while you may be able to see a puddle of transmission fluid underneath it.
Will 4L60E shift without computer?
Externally, all it needs is a 12-volt source and an engine-vacuum reference. However, if your trans is, in fact, a 4L60E, running it off a computer is mandatory. Never mind TCC lockup; without a computer, the trans won’t shift at all.
How can I tell if I have a 4L60 or 4L60E?
The rear output housing is configured with a six-bolt pattern in late model 4L60E transmissions. The 4L60 transmission is configured with a four-bolt pattern. The bolt pattern is not a guaranteed distinction, however, as early 4L60E transmissions, manufactured from 1992 through 1997, also have a four-bolt pattern.
What years are interchangeable for 4L60E?
What years does 4L60E transmission fit?
| Year Ranges | Transmission | Pan/Filter |
|---|---|---|
| 1994-1996 | 4L60E | Shallow |
| 1997 | 4L60E | Shallow – Early Deep – Late |
| 1998-2000 | 4L60E | Deep |
| 2001-2003 | 4L60E/4L65E | Deep |