I was casually looking for a transmission line kit and came across this fancy transmission pan.  It allows you to bypass the heat exchanger, it has fittings in the pan to run engine coolant.  It looks like it could eliminate the possibility of making a large milk shake should the factory exchanger fail.  It's not cheap but it has me rubbing my chin and going Hmmmm.  

 

 

Edited December 31, 20222 yr by Sycostang67

Interresting. Would be great for us in Idaho with frosty weather. Heck even my NV4500 runs cold side at about 100 to 110°F on single digit days.

On the really cold days my gauge barely cracks 100* with the OEM heat exchanger.  They say this heats up the fluid quicker and even suggested putting shut off valves on it if you didn't need the extra heating in the summer.  

I would think that in the summer that the 190-210⁰ coolant would be cooling the transmission fluid, but I guess I've not paid much attention to it. And if your coolant is warmer than that, I bet the transmission is HOT, too. Not sure I'd bother with shutoff valves.

When mine goes, I will likely try something like this. I was searching for a small shell and tube heat exchanger, and this popped up. Much more economical.

https://www.mrcool.us/63832t-mercruiser-engine-oil-cooler.html?gclid=CjwKCAiAwc-dBhA7EiwAxPRylIWuvnw3DGZiyGn15wpnydogyaNnQ4DYegcLRayE8icVje6GVuhQyBoC_J8QAvD_BwE

Yeah that's an interesting option. Pricey! I run a deep pan w/a Mishi trans cooler and it will warm up pretty quickly when it idles even when cold out. I'd say at a glance it's close to the test results listed on the website.