Transfer Case Will Not Shift

WARNING: This page is about a different variant/trim than selected.

Cause	Correction
DEFINITION: While shifting from HI range to LO range, there is gear clashing or no HI range; or the transfer case will not shift from 2 wheel drive to 4 wheel drive. Review the Symptoms - Transfer Case and perform the necessary inspections.
Mode shift clash	Disassemble the transfer case. Refer to TRANSFER CASE DISASSEMBLE . Inspect the synchronizer for being faulty. Refer to CLEANING AND INSPECTION . Replace the synchronizer if faulty. Refer to TRANSFER CASE ASSEMBLE .
Mode block	Disassemble the transfer case. Refer to TRANSFER CASE DISASSEMBLE . Inspect the synchronizer sleeve for sliding freely on the rear output shaft. Inspect the synchronizer for being faulty. Replace the synchronizer if faulty. Refer to TRANSFER CASE ASSEMBLE . If the symptoms occur during cold temperatures, flush and fill the front axle with synthetic fluid. Refer to Lubricant Replacement - Front Drive Axle in Front Drive Axle.
High/low range shift fork	Inspect the high/low shift fork for the following conditions: The roller on the shift fork for wear or damage Worn or melted range fork pads Cracked or bent shift fork Refer to CLEANING AND INSPECTION . Replace the following components if found faulty: The shift fork pads The shift fork Refer to TRANSFER CASE DISASSEMBLE and TRANSFER CASE ASSEMBLE .
High/low range sleeve	Inspect the high/low range sleeve for the following conditions: Engagement teeth for burrs or damage Sliding freely on the rear output shaft The range sleeve shift fork collar for excessive wear Refer to CLEANING AND INSPECTION . Replace the range sleeve if faulty. Refer to TRANSFER CASE DISASSEMBLE and TRANSFER CASE ASSEMBLE .
Input gear needle bearing	Inspect for the following conditions: Failed needle bearing in the input gear Journal on the rear output shaft for excessive wear or damage Refer to CLEANING AND INSPECTION . Replace the bearing if faulty. Replace the rear output shaft if damaged.
High/low planetary carrier	Inspect the high/low planetary engagement teeth for burrs or damage. Refer to CLEANING AND INSPECTION . Replace the range sleeve if faulty. Refer to TRANSFER CASE DISASSEMBLE and TRANSFER CASE ASSEMBLE .