Jeep JK Transmission Fluid

Jeep Wrangler JK

The jeep JK Wrangler was produced from model years 2006 – 2018, making it one of the longest produced Wrangler models.

It is the third generation of Jeep Wrangler models and was first displayed in 2006 at the International Auto Show in Detroit, MI.

Since its release, the JK Wrangler has been extremely popular for daily driving, extreme off-roading, and everything in between.

Learn more about what transmission fluid is best for your Wrangler JK and how to properly maintain your transmission.

What Type of Fluid Does a Jeep JK Use?

Depening on the transmission the comes in you Jeep JK, the transmission fluid is pretty consistent. Since the Jeep JK has a …. transmission, it will take Mopar ATF+4 transmission fluid. ATF+4 is common in most Mopar equipped vehicles that are 4wd. 

Jeep JK Transmission Fluid Capacity

The fluid capacity of your Jeep JK depends on what automatic transmission you have. In most cases, your Jeep JK’s transmission fluid capacity is anywhere from 8-12 quarts. 

Here are the capacities by transmission that come in a Jeep JK 

  • 42RLE (2007-2011)
  • W5A580 (2012-2017) in 3.6 Pentastar / 2.8L RA 428 (2011 – present)
  • 545RFE (2007-2010) – 2.8L RA 428

How To Check Jeep JK Transmission Fluid

Checking transmission fluid in a Jeep JK is simple and quick to do. It’s always recommended that you check transmission fluid when the vehicle is on and in park on a flat surface.

transmission fluid on dipstick showing correct levels

How To Add Transmission Fluid To Jeep JK

Adding transmission fluid to your Jeep JK is a done by filling transmission fluid through the transmission dipstick tube, which is located on the passenger side near the firewall.  

When adding transmission fluid to your Jeep JK, it is important to make sure you have the correct level, as mentioned before. 

Jeep JK Transmission Fluid Change

The beauty of the Jeep JK like most Jeeps is that it is DIY friendly and easy to maintain.  The Jeep JK was designed for ease of use, making transmission fluid changes an easy task for the average weekend mechanic. 

This video below shows step by step how to change the transmission fluid on your Jeep JK.

Jeep JK Transmission Fluid Temperature 

The ideal transmission temperature for your Jeep JK when fully warm is in the 150 – 180 degree range. This is a safe transmission temperature that will allow for tens of thousands of miles of fluid life.  

The transmission temperature chart below shows how long you can expent your Jeep JK’s transmission to last at a given temperature.

Transmission Fluid Temperature Chart

Get A Transmission Cooler For Your Jeep JK

Looking to lower the transmission fluid in your Jeep JK? Install a transmission cooler! Our helpful transmission cooler buyer’s guide gives you all the information you need to install a transmission cooler and find the right one for your needs.

In our recommendation, a medium sized plate and fin or stacked plate style cooler would be best for your Jeep JK to keep transmission temperatures down.

Looking For More Wrangler Transmission Cooler Options?

white Jeep Wrangler Rubicon driving over rocksView our Jeep Wrangler transmission cooler guide

See All Wrangler Transmission Coolers