I have two different stacked plate coolers to choose from... Which would you think would be best for a DD? One is out of a grand Cherokee Cherokee about 5"x10" and the other was out of an explorer about 9"x10".

 

Are they both the same thickness? if so I'd go with the bigger one, in either case if you use a used trans cooler make sure to clean it out really well before putting it on, if the vehicle it came from had a failing trans it could be filled with all kinds of junk.

 

Yes,,, they are both the same thickness. I filled them with kerosene then rinsed with alcohol.

 

If the one from the GC is no less than 1.5" thick it would be close to the recommended B&M 70264 cooler which is 11"x5.75"x1.5".

 

I'd say both were the ssame thickness. While I don't have them with me at the.moment, I believe they are both 1" thick or less.