98 civic tranny slip after a few seconds of driving

[Hybrid9117]

I have a 98 honda civic (not sure what model) automatic and the transmission slips after a few seconds of driving and will start moving again after I let sit for a couple of minutes also hesitates before going into second gear. I changed the fluid twice and I changed the thermostat and coolant and it got alittle better but not a lot. No check engine light is on but theirs a whine comming from transmission the car has 181154 miles on it. Someone help

 

[Puurplehatch]

When it goes in reverse or,drive does it,clunk?

When you changed the fluid did you do,a drain and,fill or flush

 

[Hybrid9117]

It doesn't clunk at all and I drained as much as I could out. the torque converter still had old fluid in it. I'm in the process of removing trans so I can replace converter but transmission doesn't want to seperate from engine iv taken all the bolts out.

I don't know what's still holding the tranny and engine together

 

[Puurplehatch]

You may need to use a pry bar between engine and trans bump it with a rubber mallet a couple times aswell I just did a trans swap yesterday