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Transfer Case Specifications:
Low Range reduction ratio: 2.6 to 1
High Range: Direct 1:1
Chevy, Dodge and Ford all used variations of this transfer case. All were chain drive to the front output, with a light weight aluminum case. Most used a slip-yoke rear output. We are not aware of a Fixed yoke conversion for this case. While these units will hold up under moderately heavy off road use, they are not considered the preferred swap due to the chain drive and thin aluminum case.
Bolt Pattern:
6 bolt circular pattern. Note: This pattern is almost symmetrical, however it is not and will only bolt up one way. Chevy, Dodge and Ford all used the same bolt pattern, However with a different ROTATION of the pattern. Dodge and ford are close, and swaps might result in a useable Tcase droop angle, however Chevy units are about 90 degrees different and cannot be interchanged. Ford units have a driver side drop, While GM units are passenger side drop.
Chevy 208
Passenger side drop (front driveshaft). This Tcase has the GM rotation of the 6 bolt circular bolt pattern.
Input Spline: We have run into two different input spline
configurations on these cases.
27 spline: The units supplied with a T350 or 700R4 automatic have a 27 spline female input shaft.
32 spline: This is the preferred shaft, as it is the strongest. These came behind Turbo 400 or SM465 transmissions.
Ford NP208 Transfer Case
The Ford NP208 has a 31 spline female input. The bolt pattern is the Ford rotation of the 6 bolt circular bolt pattern.
Use with a Klune-V Extreme underdrive:
Use the Klune with the 31 spline output. These units will bolt up directly.
Dodge NP208 Transfer Case
The Dodge 203 has a 23 spline female input. It uses the same front bolt pattern as the Chevy unit. The Klune is available with a 23 spline output shaft to match up to this application.
(Under construction)