Speedo Gear Help

[Holmes 78]

I am a new jeep owner and I am having trouble finding the right gear for my speedo. I have checked a few parts sites but I am either an idiot or just unlucky. I am leaning toward the 1st. I have a 78 CJ7 with 32' wheels and I have a Dana 18 Transfer Case . Any help would be greatly appreciated.

 

[Posi]

If you can find some old D-18 cases the speedo gears will interchange with the Dana 20 .

If you can't find them call "Herm the Overdrive guy" he has both the driven and drive gears.

 

[Sam5038]

I had a speedometer shop add a 90 degree gear reduction. They said that they could get it exactly right if they added an in line gear reduction. I didn't get that. It was close enough with out it.