Cat grader 140H, Engine # 3306, Serial #6NCO6158#1464337, Transmission #4MYO411#1442234, has got a transmission problem! I need your help, you, experienced technicians, please! It all started with the parking brake clutches. This happened when the operator drove the grader with inadequate air pressure in the brake system, hence, the parking clutches in the transmission got burnt. We remove the burnt clutches and fitted new ones. Assembled the transmission and when we started the grader only 1 forward and reverse gears operated. I checked the voltage on the solenoid D and G for parking and neutral, there was no voltage at all. The manual says when the shift lever is on park or neutral voltage (24v) should be found on these solenoids. when the shift lever is on gear 1 forward or reverse, voltage is found on the solenoids for that gear, but when you put into 2 forward to 8 gears or 2 reverse to 6 gears, voltage is found on solenoids D and G, in other words the ECM is neutralizing the transmission. EMS displays a transmission fault warning light. I swapped the ECM but the same is happening, I checked the harness from the ECM to the solenoids, just fine, harness from the ECM to the Shift lever and also it is good. what can be really the problem with this transmission? the transmission warning light came after assembling the transmission. These problems came when we dismantled the transmission, but before that it was just fine. please, I humbly ask your help!