Rep Power: 0

I have a 2012 civic sedan with 1.8l automatic. Car has 200000 miles on it...Transmission warmer failed and washed coolant into trans and trans fluid into coolant. I swapped engine and washed trans out (only drove it for about 5 miles after failure of warmer). The TCC shudder was happening prior to the warmer failure. I have washed the trans out and replaced the fluid with Honda ATF....is there anything serviceable on the trans that I can do before I do the trans swap? No codes....the car just shudders at 1500 RPM.....thanks....