Chat with us, powered by LiveChat Transfer Case Identification for 1980-1986 Jeep Vehicles | Quadratec Skip to main content
Reference
In 1980, the Jeep Universal changed to the Dana 300 transfer case. This was a great improvement over the Dana 20, and it seems to handle V8 horsepower without any problems. All Jeep Dana 300s are a right-hand drop. They have a circular bolt pattern, 23 tooth input spline, and main case material of cast iron. The length of the Dana 300 is 12". The transfer case uses an aluminum retainer that indexes this transfer case to the transmission. The stock low gear ratio is 2.62:1. The power to the rear axle is in line with the transmission.

This is a good gear-driven transfer case to retain when doing an engine or transmission swap. Jeep Dana 300s all use a 23 spline input. Some of the adapters we manufacture include a new Dana 300 input with a different input spline and other adapters retain the stock input. The various Dana 300 input shafts we manufacture include a 10 spline, a stock 23 replacement, a long 23 spline which is .750" longer spline engagement than stock, a 27 spline, a 21, 29, 31, 32, and 35 spline. Therefore, if you obtained a Dana 300 from a salvage yard, please verify the input spline.

The aluminum index retainer incorporates a front seal to protect the transfer case fluid from entering the transmission. The transmission adapter housing normally has a seal that is installed with the open side towards the transmission. This seal can be omitted on transfer case adapter installations, provided a gasket or silicone seal is used in between the adapter and the transfer case. The original Jeep adapters have a small bleed hole that is located between the two seals. This bleed hole is an indicator that one of the seals has gone bad and needs replacing.

Dana Model 300 Transfer Case

Top Jeep Articles

Orange Jeep showing a tire and wheel.
  • October 17, 2025
  • 5 min read
How to Choose the Best Jeep Wheels for Your Wrangler or Gladiator
Knowing you need new wheels isn't always enough when it comes time for a swap. Size, offset, backspacing and even weight should all be considered before making a choice.
READ MORE
Rebelle Rally competitor checking a gps location next to an event flag
  • October 17, 2025
  • 3 min read
Seven Slot Dispatch 10.17.2025
Weekly Jeep-related news items from around the industry and community.
READ MORE
A red Jeep Wrangler on a white background with a black soft top.
  • October 14, 2025
  • 5 min read
Factory vs Frameless Jeep Soft Tops: Pros, Cons, and Buying Tips
Frameless soft tops are a popular option these days and do have some differences from the factory soft top.
READ MORE
A Jeep vehicle body on a manufacturing line.
  • October 10, 2025
  • 3 min read
Seven Slot Dispatch 10.10.2025
Weekly Jeep-related news items from around the industry and community.
READ MORE
Red Jeep Wrangler YJ with a black soft top.
  • October 8, 2025
  • 5 min read
What Is The Best Material For A Jeep Wrangler Soft Top?
A Jeep soft top isn't just a one-size-fits-all application. And one of the most important things to consider before purchasing is what kind of material makes up that top. Here are some of the most important material differences.
READ MORE
Jeep thermoplastic entry guards installed on an orange Jeep Wrangler
  • October 8, 2025
  • 5 min read
Top Simple & Affordable Mods Every New Jeep Owner Should Try
New to Jeep life? These simple upgrades add protection, comfort, and personality without draining your wallet.
READ MORE
A Jeep Wrangler Willys shows off its TACTIK Goblin Grille with integrated amber accent lighting for a bold, custom front-end look.
  • October 7, 2025
  • 4 min read
Expert Review: Tactik Shark Grilles
From subtle to striking, Tactik’s Shark Grilles deliver aggressive styling, improved airflow, and easy DIY installation for Jeep owners everywhere.
READ MORE