Manual

ADVANCE ADAPTERS INC. P/N: 50-3020A
P.O. Box 247, 4320 Aerotech Center Way New Item: (04-02)
Paso Robles, CA 93447 PAGE 4 OF 4
Telephone: [phone] Fax: [phone] Page Rev. Date: 06-10-09
SPECIAL NOTE: The components packaged in this kit have been assembled and machined for specific type of conversions. Modifications to any of the components
will void any possible warranty or return privileges. If you do not fully understand modifications or changes that will be required to complete your conversion, we
strongly recommend that you contact our sales department for more information. This instruction sheet is only to be used for the assembly of Advance Adapter
components. We recommend that a service manual pertaining to your vehicle be obtained for specific torque values, wiring diagrams and other related equipment.
These manuals are normally available at automotive dealerships and parts stores.
JEEP & SCOUT DANA 20 T/C TAILHOUSING
32 SPLINE OUTPUT WITHOUT YOKE
Speedometer Calibration: There are two factors that affect your speedometer reading; actual tire diameter and axle gear
ratio. The actual tire diameter is usually different than what is printed on the side wall of your tire. For example: A 33 x 11.5
x 15 tire (depending on the brand), may actually measure 32.5" in diameter. Tire sizes vary greatly among the suppliers. Even
the same tire from the same manufacturer can vary as much as 7% in diameter.
ADVERTISED TIRE DIAMETER
37" 36" 35" 33" 32" 31" 30" 29" 28"
5.13 36T 37T
4.88 34T 35T 39T 41T
GEAR 4.56 32T 33T 35T 36T 37T 37T 38T
RATIO 4.10 29T 30T 33T 34T 35T 36T 37T 38T 39T
3.73 26T 27T 31T 32T 32T 33T 34T 34T 35T
3.55 30T 31T 31T 32T 33T 33T 34T
3.07 26T 26T 27T 27T 28T 28T 29T
53001-492 (29T)
53001-488 (41T)
2538-936 (36T)
J3212-730 (30T)
J3212-731 (31T)
J3212-733 (33T)
J3212-734 (34T)
J3212-735 (35T)
J3212-221 (39T)
J3212-222 (40T)
Listed below are a few of the part numbers for the Jeep speedometer pinion gears to calibrate your speedometer.
This tailhousing offers a speedometer option (sold separately). This tailhousing is designed to fit a stock Jeep (1983-86)
mechanical driven speedometer housing. Vehicles requiring a cable connection for the speedometer can order P/N
301506. The speedometer gear is not included with this housing, but by using the charts above you can select the correct
gear for your tire size and axle ratio.
If your stock cable does not fit this speedometer housing or if you require additional speedometer connections, then we
recommend that you contact Nevada Speedometer at [phone].