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Funny, the old Hydramatic GMC deuces would do that too, the reduction unit would get the planetary locked and engaged at the same time. In your case, I think the problem is electrical. I suspect the TCM is commanding a clutch and band at the same time. I would send the TCM off to make sure it...

Parts that might be smoked due to reverse polarity: alternator, alternator regulator, TCM (transmission controller located with keypad), transmission VIM (vehicle interface module located under PDP power distribution panel).

Ok. You mentioned batteries were disconnected for charging. Is this correct? If only the single battery was reverse polaritied, then that battery is shot. Check both batteries for voltage to start with.

Use search, term “historical” by author “carnac”. Only non winch trucks have entries.

What year model is the truck? Need to know that to diagnose what all to look at.

Resistors fail open. You will see that voltage if numerous glow plugs are open.

No unless you get to hopping and you don't let off. No more than 2600 RPM.

Your radiator core could be plugged up. If you are not getting compression bubbles through the radiator, I would have the radiator rodded out.

In

The SF-97 SHOULD be acceptable means to get a state title in all states.

Yes but only a government agency can generate a SF-97, that form is used to generate a title for a vehicle for the first time after government ownership of the vehicle.

That would be my suggestion.

Air is used to shift the transfer case, has nothing to do with 5th gear. Usually jumping out of gear is due to the bearings on the sector shaft being shot, this cannot be fixed in frame. Suggest you pull the cover and look for obvious problems with the shift forks before pulling the transmission.

Try removing the wire at the alternator. If this solves your problem, the diodes in your alternator are shorted.

The dash nomenclature plate attached with screws is a red flag, should be riveted. Does the vin on the plate match the other vin locations?

I have Progressive commercial on my 915 for $2160 /yr so the quotes you are seeing are in line.

I will check for you and send you a PM, might be a few days.

Ok so by bad you mean rough riding unloaded. Yeah it does seem the hubs are bolted to the frame on both trucks when unloaded. Both ride ok with the S250 and all the GMV crap bolted back on.

What do you mean by bad? I can’t tell any difference in ride between my GMV and my M 1037.

Close but no cigar.