Jeep / Dodge speedometer Gear Tables
NOTE: WE DO NOT STOCK THESE PARTS. This info is offered as a knowledge base item. They are available from the dealer or perhaps a speedo shop such as North Hollywood speedometer 818-761-5136
This table should apply to most if not all Jeep and Dodge speedometer connections, both in 2WD transmissions (such as the NV4500 2WD) and transfer cases. These apply to vehicles 1980 and up. Earlier may or may not apply.
There are two factors that affect your speedometer calibration: Axle ratio and tires size. Note: Actual tire size should be measured: Listed measurements are usually off.
*Electronic VSS vs cable speedo drive:
Either one will fit most jeep T-cases. The electronic VSS is a little unit that you put the correct gear on the end of. It fits into the speedo hole on the T-case. And it has a place to plug in wires to. You need 3wires +12, ground, and one wire to an electronic speedometer (such an OEM part in a 90-up jeep, or an aftermarket electronic speedo from companies such as Autometer. The cable drive is simply a part that will hold the gear, fits into the speedo hole on the T-case, and a mechanical cable directly attaches to.
NV4500 Cable driven speedo applications
You will need a transmission with an early Dodge 2wd tailhousing, and the matching Dodge mainshaft and speedo ring gear. We can supply any (GM or Dodge) NV4500 transmission with these parts. You will also need, in addition:
The parts needed to hold the speedo gear into the tail of the unit: The parts below can be sourced from the Dodge dealer. Data below is as given to us by our Local Dodge dealer:
Quoted price (as of '05)
You will also need the
appropriate speedo gear itself, as in the table above. NOTE: You will
need the LONG type, as listed in the table for the CABLE type speedo.