Thank you for your purchase of our Transfer case. Before installation, please be sure to add gear oil to the transfer case. Failure to add gear oil before installation can damage the product and may lead to premature failure. Please note that we will not accept returns or claims for products that have been damaged due to improper installation.

Proper lubrication is critical to the performance and longevity of your Transfer case, and we highly recommend following the manufacturer's instructions for adding gear oil prior to installation. We want to emphasize the importance of using the correct gear oil and adding it in the proper amount. If you have any questions or concerns about the proper installation process, please do not hesitate to contact us for assistance.

Thank you for choosing our product, and we hope it provides reliable performance for your application.

Gear Oil Type: 75W-90

Specifications:

Input Shaft (Internal Spline): 29

Front Output: 32 (Internal Spline, one tooth missing)

Rear Output (External Spline): 31

OE Number:    

NP261XHD, RTC261GXHD1

24228406, 12579907, 12581002, 12588514, 15023641

15772804, 24238186, 24238839, 412458

412542, 412604, 412-542

Will Fit Following Models:

This is for the Floor Shift model.

Fits 2001-2007 GM Trucks with RPO code NP2. This is the manual shift unit for GM trucks with the 6.6L & 8.1L engines. It has a 29 spline input shaft that mates with the Allison automatic transmission & 6 speed manual transmission.

Chevy Silverado 2500 HD 2001-2006

Chevy Silverado 2500 HD Classic 2007

Chevy Silverado 3500 Classic 2007

GMC Sierra 2500 HD 2001-2006

GMC Sierra 2500 HD Classic 2007

GMC Sierra 3500 Classic 2007

Note: Please compare your item carefully with photo and OE Number to avoid mistake!!!