Work machine having a drive train with an enhanced braking mode

A drive train retarding system for a work machine, comprising:

• an internal combustion engine having a selectively operable compression release braking system;
• a torque converter operably coupled to said engine, and having a locked condition and an unlocked condition;
• and
• a braking enhancer operable to place said torque converter in said unlocked condition when said compression release braking system is activated and at least one engine compression release brake is engaged.

A work machine comprising:

• a chassis;
• at least one wheel attached to said chassis;
• an engine attached to said chassis and including a compression release brake system;
• a torque converter attached to said chassis and being positioned to operably couple said engine to said at least one wheel;
• and
• a braking enhancer operable to place said torque converter in an unlocked condition when said compression release braking system is activated and at least one engine compression release brake is engaged.