I even have a 455D crawler loader/backhoe (to start with cousin into the 450C), HLR Powershift transmission with manual clutch. Just about every is about 25 years old and it has about 6000hrs.i just purchest a d3b & hold the exact issue with theleft pedal sticking i will attempt oil to-morrow . i have an issue. is it usual to get a loud deisel knoc