Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Transfer Case Power Flow
The Borg-Warner 13-54 Electric Shift Transfer Case provides LOW RANGE driving. This system has no selectable neutral.
In the 2-Wheel Drive (2WD) mode, torque from the transmission is transferred to the input shaft assembly, which in turn drives the rear output shaft that drives the rear axle assembly.
The 2WD - 4WD shift is accomplished through the shifting of the lockup collar that engages the drive sprocket on the rear output shaft. The drive sprocket turns the drive chain, which turns the driven sprocket on the front output shaft assembly. The front output shaft assembly then drives the front driveshaft.
The high-low shift is accomplished when the reduction fork assembly moves the reduction hub to engage the complete carrier assembly to the output shaft. Torque from the input shaft assembly is then transmitted through the sun gear, which then turns the complete carrier assembly. The complete carrier assembly, now engaged to the output shaft, provides the reduction.
The unit is lubricated by a gerotor oil pump assembly that pumps the oil through the bore in the rear output shaft.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.