The Jeep Wrangler YJ is an all time classic in the Jeep lineup and is by far one of the most popular SUV’s of all time.
The YJ, and was designed to be not only capable off-road, but a great daily driver when it first came out. The beauty of the Wrangler YJ is that it uses the extremely reliable Jeep 4.0L or 2.4L engine paired with either a TF904 or TF999 automatic transmission with a number of manual options available as well.
Due to the YJ’s age, it’s not nearly as common at is once was as a daily driver, but hobbyists still own and maintain them for weekend use or as trail rigs.
Keep your YJ going with proper transmission fluid maintenance. Learn more
What Type of Fluid Does a Jeep YJ Use?
Depending on the transmission the comes in you Jeep YJ, the transmission fluid is pretty consistent. Since the Jeep YJ has an A904/ 30RH transmission, it will take Mopar ATF+4 transmission fluid. ATF+4 is common in most Mopar equipped vehicles that are 4wd.
Jeep YJ Transmission Fluid Capacity
The fluid capacity of your Jeep YJ depends on what automatic transmission you have. In most cases, your Jeep YJ’s transmission fluid capacity is anywhere from 8-10 quarts depending on if you have a factory or aftermarket pan.
Here are the capacities by transmission that come in a Jeep YJ
- 30RH – 8.6 quarts dry fill / 4 quarts for pan drop
How To Check Jeep YJ Transmission Fluid
Checking transmission fluid in a Jeep YJ 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.
How To Add Transmission Fluid To Jeep YJ
Adding transmission fluid to your Jeep YJ 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 YJ, it is important to make sure you have the correct level, as mentioned before.
Jeep YJ Transmission Fluid Temperature
The ideal transmission temperature for your Jeep YJ 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 YJ’s transmission to last at a given temperature.
Get A Transmission Cooler For Your Jeep YJ
Looking to lower the transmission fluid in your Jeep YJ? 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 YJ to keep transmission temperatures down.