Rear door actuator is making a noise, needs replacing

It is the door lock actuator. It needs to be replaced in order to resolve the issue. The part is available from your local Mitsubishi dealer only.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

The power lock mechanism on these have this plastic gear setup and they crack. When it splits it just spins and makes that noise. You'll have replace the module, about $60 IIRC.

This noise could be cause from the door lock actuator. If this is the Problem it will need replacement. But in most cases if the actuator is faulty the locks will jump, and not always lock on that door.

Sounds like your door lock actuators are going bad. They are the solenoids that actually pull the door lock closed or push it open. Have them checked and replaced if necessary.

The lock that is doing the machine gun action has a bad actuator. You will need to have that lock replaced.

The locks are applied by a door lock actuator in each door & tailgate. See which one it appears to be. Once located disassemble door or tailgate & see if something is interfering with its operation. If nothing hitting or rubbing on it. The actuator may be lubed with penetrating oil. If that cures the noise your done. If not you will need to replace actuator.

sounds like the door lock actuator is frozen and wont unlock,you will have to get the gate open to replace the actuator,you will have to remove the paneling to get inside the door,then dissconnect linkage to actuator,then make sure linkage to latch is free and not frozen,then double check the actuator while dissconnected, hit the lock/unlock button and see if the actuator moves it should not but will make alot of noise.

replace the door lock actuator/latch assembly

I have a 1999 Chrysler T&C 3.8 liter like yours and it sounds
like you are having the same the same problem I had.
Every time you hit the door unlock or lock button, it made a loud
buzz like you just missed a question on a game show. ;-)

It turned out the problem was the rear lift gate lock actuator. The part costs
about $40 from the dealer if I can recall correctly.

The repair involves: 1st removing the middle and rear seats to get
access from the inside to the rear gate
(obviously you will have to remove the seats from the side doors
since the rear gate won't open yet)

Remove the plastic inside rear gate panel and molding (phillips screws)
Once you remove the panel, you may see a way to manually
open the rear gate. As I recall, I think there was a access opening
covered from the inside with a black weather/insulation tape.
Carefully removing this out of the way gave access to a way to
manually open the gate, making the rest of the work easy.

Remove the electrical connector and the mounting bolts
to remove from the actuator. It is attached to the inside
rear gate with 2 or 3 bolts (10 mm?)

Remove the old one and replace the part, then put it all back
together, make sure you reconnect the electrical connector

Takes about an hour for the whole job (max)

Hope this helps,

Wes

You'll need to remove screws that are by the door handle, arm rest, under door and side of door and then gently pull back on the panel as there will also be retaining clips attached and you don't want to break them. If needed, you can pull back the weather seal (can't reuse it, but it's not that important) and you will be able to access everything inside the door