Speedometer Adjustments

[KidLoco747]

I have a 1984 CJ7 with a 258 straight six, a Tremec T-176 4 speed and a Dana 300 transfer case. A couple years ago, when I started restoring the Jeep I purchased 37/12.50R16.5 GOODYEAR H1 tires. The speedometer is way off I know and wanted to know the best way to correctly adjust it. I hear alot about the changing the speedometer gear in the Dana 300. Any help would be greatly appreciated! Thanks

 

[SteelHeadz]

Instead of going through the headache of figuring out how to do that on mine , i changed my gauges to the Ultralite Autometer setup . The spedometer im using has a module that can be calibrated to any size tires.

 

[superj]

there is a chart tht tells you what speedometer gear to use with what set up and tires on one of the major parts supplier websites. 4wdparts or something like that

 

[BUTTY]

I used quadratec chart. I have 36" Hummer tires and 5.33 gears. I think it went to a 42 tooth gear on the speedo. Pull the old one out to see if you have the short or long shaft. I'm pretty sure all dana 300 have long shaft.