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It should be the other way around. Reading slower than actual speed. Is the speedometer reduction box on yours? The plastic gear on the output shaft of the NP208 and the plastic gear that goes into the NP208 are the correct ones for all the other CUCV trucks with 4.56:1 gears. Just the M1009...

Vacuum will not have any effect on reverse or 1st gear. If they don't work from a stand still then it is an internal transmission issue.

Low pressure Hydro boost hydraulic leak won’ do the pedal drop like you had. I agree about boiling fluid. I would also suggest brake hose replacement.

The part of the hose running from the splice to the injection pump is probably the original one and the proper length for the stock square fuel filter. Whoever put the spin on filter on the truck probably didn't want to go through the hassle of getting under the intake manifold to put in a new...

You have a very unique project. Simple stuff first. The alternators on a stock M1009 are each 12 volt isolated ground units. The drivers side supplies the front battery which most of the truck is run from at 12 volts. The passenger side alternator is exactly the same as the other one and...

Same here. Now I use whatever brand has the longest non pro rated warranty when I need another.

Forgot to add that through our talks. Computech knew all about my truck. He had pre programmed the controller for everything. A true plug and play install with me only having to zero the throttle position input.

My controller is not the sport comp one. It was their latest and greatest 4 years ago. Before I bought, I called up my final 3 or 4 choices to talk about my 6.5 turbo Suburban project and how their controller would work. Computech was the only one that actually answered the phone. It might...

The cross member is a super easy fix. The rear frame bolt hole becomes the new front hole. Then just drill the new rear hole in the frame with the crossmember as the template. You also need to think standard and metric. The 6.2 is all metric. The TH400 is standard. The NP208 is metric as is the...

Which side was the sun on? I second the IR thermometer gun idea. I use mine to check every bearing and tire. If one isn’t like the others by a little, no problem. By a bunch and I start to look into it.

I have not seen that part before. I know the tach signal sender without the vacuum pump is very expensive from GM. I had one that leaked oil the first time I fired up the engine. I went with the Dakota Digital alternator signal converter on my M715 which I have a complete CUCV dual alternator...

Check your fuel filter, air filter and such. If you have replaced them. Then it could be several things. The TM tab at the top of this page is a way to download the Technical Manuals for this truck. The one ending in -20 has a great almost 100 page section on troubleshooting and talks you...

Yes, that would mean 24 volts in the truck 12 volt system and 36 volts in the starting circuit. All very bad.

The green wire comes from the cold advance/fast idle sensor on the rear of the passenger side cylinder head. It goes to the cold advance solenoid on the IP cover and to the fast idle solenoid on the throttle. I don't see the fast idle solenoid in your picture though.

Double the pressure test suggestion. Maybe it had a bad head gasket 20 years ago and residual oil is what you are dealing with. Don't make a problem until you confirm you have a problem.

Very interesting form. I did something similar to what you are wanting to do with a non running out of state registered vehicle when I first wanted to register it in Texas. I had a friendly police officer verify the VIN for me. (It was before the form you linked to was created.) So, yes you...

I don't know how your 12 volt conversion was done so this is just a guess. The big red wire from the batter to the starter goes on the big stud of the solenoid. There should be a smaller 12 gauge or so wire on the same stud that goes to the diamond shaped 2 post buss bar above the glow plug...

I think you are on the correct path. Someone plugged the rear light buckets in wrong and they probably just need to be corrected is my thought. The flasher box is very delicate and doesn’t like stray electrons so do not use your blinkers to check for current at the light buckets.

Center gauge panel out of the way is how I did mine. I also have a memory of pulling the glove box to do the passenger side.

Interesting. I have only come across the 4 groove V belt pulleys in the past. 4 or 5 groove should work on the CUCV. I figure the bolt on the side of the block currently used as the rear power steering pump bracket mount and in front of the motor mount will figure in your mounting of the...