The 6.5 Turbo Diesel Engine has proven to be a workhorse and the go to engine upgrade for both HD 4L80E transmission
The 4L80E transmission was developed by GM to handle the demand of high torque vehicles.
The 4L80E transmission has been tested and is recommended for the HUMVEE®. The 4L80E is an automatic transmission that was designed to be highly durable. The transmission includes an added overdrive gear, a lock-up torque converter and advanced electronic controls