so i killed my stock trans finally- just free revs in 3rd and is having issues shifting 1-2. is my converter going to be ok too? i drove a couple miles on it like that.

 

i drove it to the bank today with the a-tap. 1-2 shifts fine. shifts to 3rd fine, but free revs. i rev it a little and let off the gas and 4th engages. temp only got to 120 from my house to the bank (couple blocks). will i need a new trans cooler? im planning on flushing the lines professionally when i get the new trans in. should i flush the converter out?