Is it possible to replace a 4L60E with a 4L80E without much headache? My K2500 LD has a 4l60e and it burned up 3rd gear pulling a long grade. It lasted 160,000 miles and pulled alot so I am not all that upset about it. I would just rather have the strength of a 4l80e. It is a 4x4. I know it will bolt up to the engine, I am just wondering about dimensions. Can the 4L60E be beffed up to withstand more towing? I am planning on throwing some more upgrades at the engine (6.2TD) and want it last.