Join Date: Oct 2017
Thanked 6 Times in 6 Posts
iTrader Score: 0 reviews
Hey guys, Iím a little late to this thread, but thought Iíd chime in with my own experience with a Mishimoto trans cooler. (FYI, Iím running their radiator too).
I have to agree with the OP, the thermostat is a disaster! I recently rebuilt my transmission, and after talking with Dave Goerend, he recommended replacing the OEM cooler with an OEM mopar cooler. The reason being, especially with the newer 48reís aka (04.5 and up), any trans cooler pressure drop had a larger effect on the trans itself. He made a point to tell me it was really with the newer 48reís vs. some of the older ones....mine in particular. (Iíve got an 05 ). Youíll find the Mishimoto trans cooler (with thermostat installed) works well when running down the road at speed with the TC locked up. HOWEVER, I almost burned up my brand new billet trans because I got caught doing 35-40mph up a hill in traffic pulling my 20K 5er. After having a minor heart attack, I removed the thermostat as quickly as I could. The temps instantly dropped 30 degrees during acceleration and up hills, even when pulling heavy. More importantly though, the transmission itself started shifting better instantly. I donít notice it as much when really accelerating, but I do notice it at slower speeds and just when shifting into or out of a gear.
Long story even longer, I think the Mishimoto trans cooler is every bit as effective as some of the add on frame mounted coolers....while also being cheaper (relatively speaking of course). That said, DONíT use the thermostat. If you live in colder weather like me and are worried about the transmission warming up in the winter, just put a set of electric fans on the front with a manual ďoffĒ switch! As an aside, Dave also highly recommended against adding a 2nd frame mounted cooler as he said the pressure drop is too great and it reduces the flow. Granted if youíve got an older model 48re youíre probably fine, but if youíve got a newer one....itís up to you.
When it comes to my transmission, I trust the folks at Goerend transmission....especially the owner, Dave Goerend. (Heís probably forgotten more about them than Iíll ever know!). He can definitely give me an ďI told you soĒ when it comes to trans health and trans cooler fluid flow after my mid-adventure bringing my camper home.
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05' Dodge 3500 5.9 4x4 Dually; aFe Pro Dry S intake, aFe stainless exhaust manifold, Magnaflow 5" turbo back exhaust, Redhead Steering gears/borgeson shaft, EBC brakes, HE351CW 67/67 w/Billet aFe waste gate turbo, Pusher Spool Aid Intake, aFe Intake Horn, GDP Intake Plenum cover, FASS Titanium 165, Pac Brake, Flexlite Fans, Mishimoto Aluminum Radiator, 5" Solid Aluminum 1 piece driveshaft, 65% injector nozzles, Billet Triple TC, billet flexplate, Manton 7/16 pushrods, Manton valve springs/trunions/VB's, Firepunk tuning ....and still adding!
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