So guys, I developed lock up issues Friday morning. My truck was going subtle in and out. Ironically at the exact same time my trans developed shifting issues.

Currently it is holding 1st gear to 2,500 rpm, and shifting between 45-55, and I also have the unlock and lock up problems as well.

I traced an issues with a loose positive battery terminal and the grid heaters.

Today I tested my vac, and I had .027-.033 at the batteries. And .04-.065 with the grids during away.

After fixing the terminal using threaded rod and some nuts, the grid heater drop is now 12.15v instead of 10.15v.

However, after the repair my alternator now is pushing .09 and the batteries are a little higher at .035-.04.

Now, I did ohm test the main cable between the two batteries and I got .03-.06 this was with the one side unhooked.

I'm so annoyed I don't feel like this alternator is fried, but currently I know it must be at the center of this.

It doesn't help that I also flashed the smarty again, and coincidentally this happened.

I'm going to try and get to Napa and see if they have another terminal bolt, I suspect that rod may not be helping it.

Pull the relay for the alternator and take it for a drive. That's the only real way to tell if the alternator is the cause.

When you check for AC check it at the alternator for a more accurate test. With the numbers at the battery you are probably above .1 volt AC. Like TFaro said, disconnect the alternator and see how it drives.

I like the idea of removing the plug & +BAT wire from the back of the alternator. The charge wire can act as an antenna & transfer the AC noise through inductance.

 

Ed

Guys I already ran a vac test with my fluke meter, the alternator was .06 before the writing fix, but now hovers around .09 volt.

Guys I already ran a vac test with my fluke meter, the alternator was .06 before the writing fix, but now hovers around .09 volt.

But didn't you say you checked it at the battery? The battery will absorb a little bit of the AC that's why I said to check it at the stud on the alternator. If you are at .09vac then it wouldn't take much to be at or above .1vac at the source.

I checked both, the batteries were .03, but the alternator was .08 ish.

I pulled the grid heater wire of, then pulled the alternator lea, and the lock up issues went away, however the delayed shifting remained, thought not as bad.

Near failing state...

 

Normal is 0.01 to 0.02 Volts AC

 

Limit 0.1 Volts AC

I replaced the alternator, and the lock up issues went away.

I replaced the vss yesterday, and my first gear shift is now down to 2,100,-2,200, and the shift is not as bad, but it is still higher then it was.

I'm out of ideas, now I'm thinking towards a governor pressure issue.

Dropped the pan, and changed the filter and fluid and tried a band adjustment and the 1-2 shift is still lagging. But end everything else cleaned up.

Hopefully you didn't get a$100 alternator at part store, and when you check vac rev up engine and see where it climes. At alternator.

I replaced my alternator and my issues continued,I changed my torque management on the smarty, issue went away.