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OK, using the time-tested formula of "# of Drive Gear teeth X axle ratio X (20168 divided by tire diameter) divided by 1001 = # of Driven Gear teeth to use", I determined this: 15 (drive gear teeth) X 3.73 (M1009 rear axle ratio) x 616.99 (20168 divided by your tire diameter of 32.6875) divided...

Gimme a few minutes to run the equation with 33" tire. Are you sure your center of tire circumference is 33", or is that what you think it is? Nothing beats jacking up one front wheel and measuring the COT circumference with a tape measure.

Wow what a coincidence. You were born in Lexington KY and moved to Atlanta? I was born in Atlanta and moved to Paris, KY, just N.E. of Lexington. Actually I was born at Emory University Hospital in Decatur and was raised in Powder Springs in Cobb County. Went to McEachern High School, Class...

OK, here goes - This first photograph shows what the installed assembly should look like when it is clean and without the reducer. You will see that the sleeve has the raised numbers 40, 41, 42, & 43, which indicates that this particular sleeve is for driven gears with those tooth-counts...

It’s not rubbish, it’s science. First, clean the dang area so you can see what the heck you are doing. Then take the blasted reducer off and throw the thing in the trash. Then get a new speedometer cable and a new driven gear and put it all back together. I have both parts here so if you can’t...

Opps, sorry. Here is the TM page for the transmission cooler lines -

Not meaning any disrespect, but sometimes it is helpful to simply refer to the 34P Technical Manual. They are free to download from this site - https://www.steelsoldiers.com/threads/cucv-technical-manuals.220280/

Ditto what Barrman said. The OEM driven gear GM installed in the CUCV NP208 transfer cases was the 41-tooth yellow gear, GM part #1362195. To speed-up the speedometer reading when driving, the tooth count of the driven gear should be reduced; similarly, to slow the speedometer reading when...

I am confident that a new AC Delco speedometer cable can be easily sourced on Ebay - simply type in the GM part number: 25033627. Regarding the driven gear and sleeve at the transfer case, you may find this post helpful: https://www.steelsoldiers.com/threads/calibrating-speedometer.223246/

Did you get this figured out? I'm interested to know what tooth-count drive gear GV installs in their overdrive units.

Today I got the drivetrain moved forward one-inch by repositioning the engine mounts on the frame platforms. Before removing the engine to do this, I marked the outline of the mounts on the platforms with a white marker, and then after the drivetrain was removed, I removed the bolts in the...

Pulled the core support back off and clamped it on my bench, then fit the new Derale #16843 dual electric fan to the radiator. This dual fan provides 4800 CFM cooling capacity, which will be helpful to pull fresh air through the intercooler for the supercharger, A/C condenser, and radiator...

You will need to do your own research regarding which drive gear & which driven gear you have. But the formula I provided stays the same, Determine your exact wheel diameter and then do the math. Then determine the tooth count of your drive gear, regardless of where it is located, and that...

As a follow-up, the OEM M1008 NP208 transfer case came from the factory with a 15-tooth gray drive gear, GM part #14037997, and a 41-tooth yellow driven gear, GM part #1362195, and a GM #25512339 sleeve. To make sure a previous owner hasn't changed these, you can easily remove the driven gear...

You might find this helpful - https://www.steelsoldiers.com/threads/calibrating-speedometer.223246/

Got the new all-aluminum radiator installed yesterday. Fit was excellent, however the overall height was approximately 3/8" shorter than the OEM radiator. I had some black neoprene rubber in the shop, so I fabricated a couple of saddle spacers to fit over the top mounting tabs which made the...

OK I have been asked about the PCV valve and how it will be hooked up, so here is my reply for all to see: Because the supercharger intake is at the rear of the blower, and because I mounted the centrifugal oil filter on the drivers side of the intake, the housing and in-line air filter for the...

Easier to see with a flashlight at night in a blinding snowstorm in Wyoming while installing a power steering belt 4 miles from the nearest road. Ask me how I know. All belts must be removed in order to install that rearward PS belt. There are 2 bolts to loosen for the passenger side...

After completing the installation of the Vintage Air system, I cleaned & undercoated the underneath of the cab. It didn't take much cleaning, as it still looked new from sitting in Arizona all its life. Still amazed at the absence of rust. Got the new drivetrain bolted in place over the...

Got the P400 / 765R4 / NP241 bolted in place. I'll be posting more photos and information in my rebuild thread.