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Idahome
Joined: Wed May 2nd, 2018
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its because they sit idle and are not used enough
It is EASY to rebuild
There is a plastic spacer inside the stator assembly that dries out over time and breaks apart into pieces. This allows the stator to over rotate and the motor gets "out of position"
You basically are going to take the whole thing apart, clean the armature and brushes on the motor side
Then clean up the stator assembly and replace the missing plastic bushing with a piece of rubber tubing, put it all back together and test it.
That is the basics, these motors have been rebuilt on the bench by people of all skill levels over the years, you can totally do this.
My stock 1988 motor lasted until 340K miles when I finally converted to a manual transfer case. I had rebuilt it twice
You also need to consider deleting the vacuum hubs, they really do suck very badly on the 98-99 ranger. I am not sure if they can cause a flashing 4x4 light, I do not think they can but I am not sure.
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I build custom RBV, specializing in drivetrain conversions, wiring, suspension and complete custom trucks