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IIRC, second gear does not have the same type of bearing/bushing(I dont recall the specifics). When synthetic was used, it burned or galled or something. I don't recall the specifics. The point of my post was, members have seen failures in their transmissions with synthetic. So, do your...

Yup

Why not be creative and add a switch that will disconnect the fuel shut-off and connect it to the horn. When they turn on power and hit the starter, the horn would blow. Or even make it not require the power on first. Hit start and horn blows. Hide or mis-lable the switch

Others have seen failures in the trans with synthetic. Do your homework before you put your faith in what you read on the internet.

Simply said, if you read the forums here , you will find well over a 100 people(actual amount is probably much higher) that have experienced starter run-on. The doghead relay modification definitely will help eliminate this from ever happening(before it happens). Other situations can still...

I'm guessing the magic wire referred to on the IP is the single Douglas connector wire that is on the top(fuel shut-off solenoid).

One other possible issue the OP may have that has not been mentioned is the steering column key mechanism and switch, it could have been his original problem. I think he mentioned he tested his under-dash relay and found fault there but with his experiance and communication shortcomings, I am...

If you have a stuck starter solenoid, or bendix,or stuck under-dash relay and you disconnect the battery supply to the starter motor, your solenoid supply wire(small one) could then take over and it is not sufficient for the motor load(the starter will continue to run). Fire will soon follow...

The issue is there are three connections that need to be disconnected at once. No issues with pulling a starter out after it starts, if you need to.

A battery disconnect poses several problems with these trucks during a starter run-on. I would not do it.

Nothing is infallible, but that relay is very very dependable(depending on manufacturer and manufacturers quality). And for what it's worth, it's a relay. Not a lawnmower relay, not a ford relay, just simply a relay. It's used in frieghtliner trucks, trains, busses, and maybe even the space...

You never mentioned that you replaced an alternator. Could you post a picture of your under-dash starter relay(still not sure if you have replaced it or even checked it). Rebuilding your original alternators is almost always a better option. Same with your starter. We need pictures in this...

Kind of annoying, huh? Post it all here in the forum if you are going to use the forums. Don't assume anything, diagnose and repair.

If it functions as well as it looks, you have a winner. Very nice.

Sgt. Hicks would have been a passenger(aka, not the driver)

wmi? Is this for the over the road load hauling dually with tires that are near impossible find with an intercooled motor?

Also, is that outlet rated for 20 amps?

I'm curious what the exhaust pipe cost.

Yup

It would be nice if vendors and members would capitalize in/on our forums. We can't even get anyone to post in the correct forums...