When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
I've seen them often on REALLY heavy duty trucks. They are used to cool the engine oil. It's fairly common. GM had an issue back in the 1990's with them blowing the gasket between the block and oil filter adapter.
That would be an oil cooler not a transmission cooler.