Hello guys,
I bought a used 4L60E together with its torque converter and paid the mechanic to replace my blown transmission. The mechanic installed this "new" transmission together with its torque converter and added some ATF. He did not replace the filter and the old ATF; I planned to service the transmission later, after checking that everything works properly. It seems that the "new" transmission shifts good. However, I noticed a shudder at 50-60 mph. If I accelerate or press on the brake pedal, the shudder stops. I am using the Torque application and can observe the TCC slip. It seems that the shudder occurs when the torque converter clutch (TCC) is engaged. There are no error codes, at least there is no "check engine" light and the Torque application does not show any errors. The shudder definitely comes from the transmission. There are no misfires, the engine works good. I suspect the bad TCC. How can I know for sure that the problem is within the torque converter and not related to something else (valve body, etc)? I have a good torque converter but cannot replace it by myself, so I will need to pay the mechanic for this job again.
I bought a used 4L60E together with its torque converter and paid the mechanic to replace my blown transmission. The mechanic installed this "new" transmission together with its torque converter and added some ATF. He did not replace the filter and the old ATF; I planned to service the transmission later, after checking that everything works properly. It seems that the "new" transmission shifts good. However, I noticed a shudder at 50-60 mph. If I accelerate or press on the brake pedal, the shudder stops. I am using the Torque application and can observe the TCC slip. It seems that the shudder occurs when the torque converter clutch (TCC) is engaged. There are no error codes, at least there is no "check engine" light and the Torque application does not show any errors. The shudder definitely comes from the transmission. There are no misfires, the engine works good. I suspect the bad TCC. How can I know for sure that the problem is within the torque converter and not related to something else (valve body, etc)? I have a good torque converter but cannot replace it by myself, so I will need to pay the mechanic for this job again.