Competition Total Spline Input Gear

You’ve found Marlin Crawler’s one-of-a-kind “Total Spline” 23-spline 2.28:1 transfer case input gear, the strongest 23-spline input gear in the world, now available in our Ultimate Strength Competition-grade Material!

Made in Japan by Toyota’s own gear cutter. Experience the success of our Competition Series Chromoly Gears in your very own rig!

This will convert a 21-spline 1979-1995 4-cylinder transfer case to a 23-spline version so that the stronger 5spd R150F (3.0L V6) and R151F (2.4L Turbo I4) transmissions may be used. Fits any gear driven t/case originally fitted to 4cyl 1979-1995 trucks and 4Runners, and used in all our 1979+ Dual T/Case and TacoBox setups. Factory 2.28:1 Gear Ratio.

This is the strongest 2.28:1 input gear in the world.

• Total-Spline™ Technology

• Heat Treated Chromoly Steel

• Full-length Spline Engagement

• Addresses one of the weakest parts of your t/case

• Minimizes Dual Case Coupler wear, combats strip-outs

You will not find a stronger input gear! Also available made from our XD material, click here for info
Build your transfer case right the first time, and put your tools away!

Weight	4.25
Dimensions	4 × 4 × 7.25 in

Make	Model	Year
Lexus	GX470	2003 - 2009
Toyota	4Runner	1984 - 1989
Toyota	4Runner	1990 - 1995
Toyota	4Runner	1996 - 2002
Toyota	4Runner	2003 - 2009
Toyota	4Runner	2010 - 2024
Toyota	FJ Cruiser	2006 - 2009
Toyota	FJ Cruiser	2010 - 2014
Toyota	Hilux/Pickup	1979 - 1983
Toyota	Hilux/Pickup	1984 - 1988
Toyota	Hilux/Pickup	1989 - 1995
Toyota	Sequoia	2000 - 2007
Toyota	T100	1993 - 1994
Toyota	T100	1995 - 1998
Toyota	Tacoma	1995 - 2004
Toyota	Tacoma	2005 - 2015
Toyota	Tacoma	2016 - 2023
Toyota	Tundra	2000 - 2006

We appreciate your feedback! Please share your thoughts on the product itself, including its performance, design, and how it meets your needs.

Guidelines for Submitting a Review:

Account Required: In order to limit spam we ask that you please Log In first.
Focus on the Product: Please review the product's performance, durability, and how it fits your expectations.
Avoid Reviewing the Shopping Experience: If you have feedback regarding our website, customer service, or shipping, please contact us directly at Customer Service to help us improve this process of customer experience.
Be Honest and Detailed: Whether your experience was positive or had room for improvement, we want to hear about it.
Respectful Language: Please use respectful and appropriate language in your review.

What Happens Next?

Review Moderation: All reviews are subject to moderation before being published. This ensures that the feedback we share with our community is helpful, relevant, and focused on the product.
Private Outreach: If we receive constructive feedback, our team may reach out to you directly to better understand your experience and explore ways we can improve.

Thank you for helping us make Competition Total Spline Input Gear even better!