Without a doubt, Excess heat is the number 1 killer of transmissions. For individuals who tow, race or simply run their diesel hard, proper cooling of your transmission fluid is one of the most important things that you can do to increase the life of your transmission.
When the mainline pressure is increased with upgrades such as a high-performance transmission kit, your transmission generates additional heat. A PPE Performance Transmission Cooler is critical in such situations.
Pretty easy install.
Had to cut the center grill mount a little bit. Said it fit Chev/GMC, must be only GMC. No big deal, dropped trans temp by nearly 20 deg.
Fits into OEM placement! Instructions are very thorough and straightforward, easy install. I personally have not noticed a huge decrease in transmission temperatures. Close to oem cooler temps. Good replacement part well built! I would definitely recommend doing the trans cooler lines while you are at it only adds another 30 mins to the job using the fleece trans lines!
Certainly a lot bigger than the factory one however it fit with just a tiny bit of tinkering where the factory one fits all the connections were great other than the clips that came with it to the oil cooler lines didn't hold the line as firm as I would have liked so I reused the original GM Clips which fit tighter and allowed the locks to hold much better