blwnsmke

Im looking into ways of keeping my transmission a little cooler. Especially since I spent a ton of money on it. I was looking at the factory cooler up front and it looks poorly designed.. Is there anyway to buy a larger and better one from like B&M with a fan and replace the factory one? I saw one from ats but I don't wanna spend 300 bucks when I know I can do it cheaper than that. If I were to buy a larger one with a fan how would I go about hooking the new one into the factory fluid lines? Also what would be the best way to wire it up? Straight into the ignition? Would there be a big difference if I were to just attach a fan onto the factory cooler?

04DEEZELRAM

......bump

Spooler

No real reason to replace the tranny cooler. It is very good size and I have had no issues at all with it keeping my tranny cool. Only time it even thinks about getting hot is backing up a fair distance. You'll be fine. Save your bones and spend it on tranny services. That is what makes a difference.

blwnsmke

Correct me if Im wrong but from the very front of the truck it goes A/C Condenser, Intercooler, Trans Cooler then radiator correct? We also have a heat exchanger on the driver side of the block that the transmission lines hook into also correct? I think if anything I may either add a 10" pusher fan onto the factory cooler or add an additonal cooler with fan under the truck somewhere.. I see cruising temps of 180* and sitting at redlights about 210* I have a brand new trans and a double deep pan.. Just makes me nervous with all that money under there..

Spooler

My sensor is in the hotline and I only get to 160 degrees max cruising down the road loaded. Empty I have never got above 140 degrees just cruising down the road. Where is your sensor at?


Yes, that is the correct layout. Electric fan can go in the front but it has to be smaller than 2 in. in thickness and go in front of the condensor.

paroxysym

i think the factory cooler works fine. i have seen as high as 190 with my built tranny, running it hard while empty. i have never towed with my truck but i cant see it getting higher than maybe 220 max towing. just running around town and in traffic ill see 160, cruising ill see alittle over 130. for what it is, i think it does a decent job, my sensor is on the supply line from the tranny.

Minwy

You shouldnt see temps like that unless your pulling or in stop and go traffic. Chances are if you are seeing 180 empty on the highway your new tranny has some issues. My Goerend built one is running about 15-20 degrees less than the factory unit when going down the road. Poor oil flow will result in tranny wear and higher temps.

jkitterman

Have you checked and cleaned your heat exchangers lately? They could just be dirty and need some of it cleaned off.

THURENfab.

I want my tranny to be under 200* ALL THE TIME, so I'm tring a crazy cooler idea. Not 100% sure how it's going to work, but I'm going to have a Holley Blue pull fluid from the pan, and circulate it through a 29,000 BTU B&M cooler with a 8" fan..

IMO, stop and go traffic shouldn't get these trannies to 230*+ like they do...

Just about done with the cooler/fan/mounting under the bed so we'll see what happens..

paroxysym

are you talkinga bout my temps? im seeing 160 empty in STOP AND GO traffic. If i hit 190 its because im running the **** out of it. i see a steady 130 if i set the cruise to 70 and just let her roll... there isnt any blockage, i flushed every tranny line there was.

CamperAndy

This past weekend I hit 250 on a 2000 foot climb pulling 9,000 pounds. It was a twisted road and I could not drive fast enough to lock up the converter. I read the temp on my attitude monitor which reads it from the ECM. There is no stock trans temp gauge on these trucks so what is a guy to do without the gauge? Just drive fat dumb and happy??

When I can drive fast enough to lock up the converter the temps are MUCH better. I will be looking at a deep/finned pan and possibly an extra cooler.

ptgarcia

It seems the majority of built trannies run quite a bit hotter than a stock 48re. I'm interested in seeing how adding an additional cooler works out since I have a brand new B&M cooler in my garage I could install.

scottsjeeprolet

Here's my B&M super cooler mounted under the bed. I made the mount myself, just copied it off a guy's i saw on Ebay.

The Holley is my pusher FP.
My tranny runs pretty hot, it's the tight converter i have, once locked the temps drop pretty fast.

paroxysym

thats what i thought when i got mine, it was cause hotter temps. i was fine with that. i know my stock tranny would never hit 130, unless stop and go traffic was present.

GlennRMK

I am usually at 140-145 cruising down the road at 55-70 MPH.

However in traffic I can see 160-170.

The hottest I saw was when I was driving some forest service roads and gaining elevation and only going 20-30 MPH. Seen the temp climb towards 200. Seems like going slow really raises the temps.