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I recommend the B&M Supercooler. The 19,000 GVW size seems to be the best size for average use (no towing.) It's big enough to give our trannies a much needed boost in the cooling department, but it still fits comfortably in front of the A/C condenser.

Whatever brand/model you decide on, make sure it is a stacked-plate design, preferably with a bypass function. Stacked-plate designs are much more efficient than the tube and fin designs. Thus, you get better cooling out of a smaller cooler. The bypass function allows cool fluid to bypass the stacked-plate portion, thus allowing the trans to get up to operating temperature more rapidly. Then, once the fluid is hot, it flows more easily through the stacked-plates, and the cooling action kicks in.
 

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Originally posted by 3-fords1000+Mar 11 2004, 04:12 PM-->QUOTE (3-fords1000 @ Mar 11 2004, 04:12 PM)
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@Mar 11 2004, 02:13 PM
Whatever brand/model you decide on, preferably with a bypass function.  Stacked-plate designs are much more efficient than the tube and fin designs.    The bypass function allows cool fluid to bypass the stacked-plate portion, thus allowing the trans to get up to operating temperature more rapidly.  Then, once the fluid is hot, it flows more easily through the stacked-plates, and the cooling action kicks in.
Is the bypass a built-in feature or an add-on? I've seen thermostats that are sold seperately for using with engine oil and trans oil coolers.[/b]
It's just an inherent feature in most stacked-plate designs. In most cases, there are no moving parts. In addition to the countless narrow passages across the stacked-plate grid, there is a larger (about 1"x.5") channel that runs across the edge of the cooler. When the fluid is cool and viscous (thick), the majority of the fluid takes the bypass path since there is much less resistance. As the fluid heats up and gets less viscous, it can flow through the stacked-plate grid with very little resistance, and the full cooling effect of the stacked-plates is realized.

There are also mechanical bypasses that are added-on to an existing cooler, IIRC. But that seems like too much work, especially when the stacked-plate coolers are now so cheap and plentiful.
 
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