Torque convertor recommendations

[MonsterBIlly]

So I have A408 with 488 gears and 37 and I'm running a 4r70W transmission.
I'm dropping off my trans to be rebuilt but it appears that I may need a new torque converter. So if I choose to buy an upgraded torque converter like billet or something like that like that what is everyone's recommendations.
I can have my current one rebuilt maybe but I think it's actually ballooned so it may need to be replaced.
And then does it make sense to keep a factory spec for the Ford Explorer or to do something with an increase or decreased stall I'm not sure about this this is one thing that I don't know very much about.

 

[DirtDonk]

What is your expected horsepower level?
Just as important, if not more so, how do you intend to drive it?
How will the cooling system be built? Those for engine coolant and oil and transmission cooling?

My questions are sort of centered around possibly getting away with stock or a slightly higher stall speed, versus really upping the stall speed to gain an advantage.
But that advantage could simply be in acceleration on a dragstrip rather than forward motion on a slow trail.

I believe your stock stall speed will average out higher simply due to the higher horsepower rating of the engine you’re hooking it to.
Not to mention the big heavy tires!
But there are some real deep mathematical guru experts on torque converter design, philosophy and engineering right here on the forum.
Hopefully one of them will give you their take on it.

 

[Broncobowsher]

How did it drive with the stock convertor?
How high do you rev it on the top end?

I find the stock convertor to be a good drivable convertor. Most of the convertor advise from the speed shops will get you down the quarter mile quicker, and make it much less drivable at anything less than full throttle.

The stock convertor is known for some ballooning issues at high RPMS. 6K and higher, you really should start looking at convertors that can take the RPM.

It's been over 10 years since I was doing my research on 4R70W convertors. I have no idea what's out there today.

 

[MonsterBIlly]

Balloning is what happened to mine. It trashed the thrust bearing.
Happily blueprint is covering it under warranty. I cant believe a company these days actually stands behind their product. Whoohoo.

The stock convertor worked well until it didnt. Maybe i will get a billet convertor built to stock soecs.