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It was introduced on some of the 13's when FCA adopted the thermal management system. It was fairly common on Canadian 4.7 trucks,i think we might of been the guinea pigs,it wasn't used as much on the 5.7 trucks with the 6 speed till a year or two later.
Thought about it a year or 2 back,but never did.Try it out and let us know how it works,as i'm curious myself.
I'm currently reading through a post where you guys did a lot of different things. Are you still running the plastic plug with no stat and coolant lines connected? If so, how's it working out? I was thinking the Revmax kit then found these pages and would like to remove lines instead of a block off plate that stops trans fluid from circulating in the heater.
Khris/CrazyKid and i both deleted everything. Neither of us are running the heat exchanger on the side of the tranny,i even went so far as to convert my 14 back to the 5/6 speed heater hose set-up,bypassing the 3 way valve the earlier 8speed trucks used.Starting about here,you can see how we did it,in hindsight Jesse's/Caulk04's plug is the way to go,but he hadn't devoloped it yet when Khris and i started messing around with the thermal management on the 8 speeds.If i was doing it again,i'd use Jesse's bypass plug instead,as it's simplicity in itself,and is easy to revert back to the stock set-up,if you ever have to take the truck in for warrenty work,or you live where it gets cold in the winter.My trucks been off warrenty for awhile,and i don't use it in the winter all that much,so having the aluminium heat exchanger gone doesn't really bother me.plus the side of the tranny looks alot better with it gone,lol.
www.ramforum.com
If you only remove the heater lines and leave the tstat then it’ll just take longer but it’ll still get over 180° as that’s the Tstat temp. Without removing the tstat and blocking secondary passage to limit flow only to the cooler then temps will eventually reach normal temps. By blocking the actual heater passage as the rev max kit does to limit oil flow only to the cooler you will have lower temps because 100% of the oil gets cooled.
Thanks for the feedback, how long does it take the trans to get over 100F with everything deleted? Im running 37s with an overland build going forward and I'm putting in more heat to the transmission itself. If it doesn't take long ill probably do similar to what you did as warranty is gone on my truck.Khris/CrazyKid and i both deleted everything. Neither of us are running the heat exchanger on the side of the tranny,i even went so far as to convert my 14 back to the 5/6 speed heater hose set-up,bypassing the 3 way valve the earlier 8speed trucks used.Starting about here,you can see how we did it,in hindsight Jesse's/Caulk04's plug is the way to go,but he hadn't devoloped it yet when Khris and i started messing around with the thermal management on the 8 speeds.If i was doing it again,i'd use Jesse's bypass plug instead,as it's simplicity in itself,and is easy to revert back to the stock set-up,if you ever have to take the truck in for warrenty work,or you live where it gets cold in the winter.My trucks been off warrenty for awhile,and i don't use it in the winter all that much,so having the aluminium heat exchanger gone doesn't really bother me.plus the side of the tranny looks alot better with it gone,lol.
RevMax 8 speed thermostat bypass
Took the wife out for supper tonight,we weren't in any rush and we were on 2 lane back roads,so i had the cruise set at 90 kmh's roughly 56mph,our favorite little eating joint is about 40 miles away,tranny just barely got over 110f in her car.
Depends on how i drive it,hard driving it'll get to about 120 in a couple miles,easy driving it'll take upwards of 10 or 15 miles.Also depends on ambient temp to,last week we were sitting right around 95F to 100F,so it would hit a 100F in about a block,but then it was also at 90+F when i'd start it,lol.
That just slows the heating of the trans and won't affect the equilibrium temp. Also, if the tstat fails as it seems happens often enough you get no cooler flow at all. So perhaps slightly better than stock, but not much.
Mine was breaking over 100 in below freezing temps by the time I got to work early this year. That's about 30min/22mile
Do have the heater blocked off?
I think I'll end up putting in an Improved Racing stat set at 145F. I do drive in winter weather with ~2 weeks @ 0-10F so the constant cooling may not be ideal and their stat still has fluid going to the cooler instead of constant recirc.
Make sure to share info on how you do it. When you do please post lots of pictures as well for anyone else interested in that.
I personally sprung for the Revmax kit. I'm in Denver so we are fairly cold in the winter. I am currently only a 10 mile or so drive from work and I hit at least 90 degrees on the coldest days. I havent be driving the truck as much this summer, but I think my max trans temp has been below 160. I think there are multiple ways to accomplish lower trans temps on these trucks just sad we have to fix a stupid design in the first place.
