Here's what you need to know:
- Heat KILLS transmissions.
- AW4 is one of the strongest transmissions available. No real reason to upgrade beyond the AW4 unless you are swapping for a v8 WITH a supercharger.
- The most affordable upgrade to protect your transmission is to add a supplemental transmission cooler.
- Stock XJs usually come with a smaller tranny cooler but are insufficient after lifting, locking, and armor plating your XJ.
- Buy the largest transmission cooler you can fit.
- 15" x 7-1/2" x 3/4"
- B&M model #70268 - 11" x 7-1/4" x 3/4"
Transmission Temp Gauge Installs: