Has anyone added an additional trans cooler
Also added a spin on in line filter?
If so has it made any noticeable difference?
Also added a spin on in line filter?
If so has it made any noticeable difference?
My thoughts were aiding additional filtration with an easier filter change and to do it more frequently like every other oil change replace the spin onThere are many that have done the tranny cooler. Keeping your trans cool is the only way to really extend the lifespan of the 4L60 in these trucks.
I know someone had mentioned previously about using a in-line filter, but it really would defeat the purpose, since you would still have to keep the in trans filter, just because of the design of the OE filter.
My envoy was purchased with 186 on the clock idk if the trans was ever serviced I'm scared to do oneI added a transmission cooler at 130K miles. I added it for towing a small trailer or boat. I have done minimal towing since installation and now have 190K miles on the original transmission. I also do transmission service 30K miles. Filter and Dexron VI. Fingers crossed....so far so good.
Saturday mid afternoon, made a drive over to Orlando to meet up with some friends for dinner. Hadn't taken a drive that far in a few years, and the last time I did, the tranny ate itself, and I believe plugged up the thermal bypass in the aux cooler I had at the time.
Since the new aux cooler doesn't have the bypass, I was interested to see what the temps did. For the most part it was an easy drive, set the cruise at 70 after finding an open section of highway and left it there. Coolant stayed around 195, tranny was at 175, both give or take a couple degrees. Got near Disney and ran into a parking lot (as expected). Within about a minute, the tranny temp climbed to 188. I knew the residual heat would do that with the airflow only coming from the fan, but after maybe 5 minutes of 1st gear stop and go, the tranny came back down to 179.
To that point I had all 4 windows down, and decided to put them up and use the AC. Coolant went up to 200 and stayed there, but the tranny readings stayed the same at 179. Once traffic got free flowing again, coolant temp came back down to 195, and tranny back down to 175. Made the drive back home at 11:30 PM, and the tranny temps stayed around 168 due to the cooler night time temps. Very happy with the performance of the Hayden model I got. The thermal bypass on the Tru-Cool that I had before was more trouble than it was worth, given the FL temps.
Consistency.... the one thing we can count on when operating a reciprocating assembly is heat. If we let it cool constantly there's no telling what the variation from high to low would be. Put a thermostat and we can count on it being above the thermostat's opening temp and engineer to attempt to keep it as low as possible (but still above the set point). This narrows the operating temperature band. If they can count on a consistent temp (and by extension all the properties affected by it), they can engineer to it (clearances, friction coefficients, etc...).They have been doing this since 2014 on the 6L80E. Why? Is it to keep fluid temps high to keep it at a lower viscosity (thinner) to improve MPG? Is it a built-in self destruct?
It has a beefy cooler separate of the radiator however there is a "thermostat" on the cooler line outlets on the tranny that only opens at around 195f, which is the temp that it seems to hang around. In traffic, I have seen it climb to 215f. While towing, even in +30c, it keeps around 195-200f. They have been doing this since 2014 on the 6L80E. Why? Is it to keep fluid temps high to keep it at a lower viscosity (thinner) to improve MPG?
This is absolutely true!!! As long as the thermostat itself isn't a restriction to the circuit, or if we assume the thermostat doesn't have issues.That's really interesting, I never thought to extrapolate to trans fluid temps...
Any cooling system with a thermostat is designed to raise the temp to the thermostat opening temp. the thermostat has nothing to do with cooling it's for warming.
I took the thermostat out of the Envoy last summer and I had trouble getting the coolant above 65C/150F. I put it back in and it sits just shy of 100C all the time, the addition of the thermostat warms the system up, it doesn't cool it off.
The same would be true for a thermostat in a transmission cooler line, without it the trans fluid may get too cold.
Now I wonder if the addition of the PCMofNC cooler I installed is making my trans fluid too cold, maybe I need to retrofit a thermostat from a 6L80E into my system.
However, I have seen in-line thermostats for tranny coolers that could be added to the aux cooler if you think it's running too cool,
This is normal. I have a Sierra w/ factory external cooler and dash gauge. It takes much longer to get the fluid up to temp, vs. engine oil and coolant. Especially if you're under steady state cruise, vs. continuously shifting up / down (stoplights, etc.) It can take an hour for mine to get to 150F on the gauge, which is where it normally sits at when warm (I think 'full operating temp' is 160F, IIRC)The coolant was up to temp by the time I got to the store but the trans fluid lagged far behind.
Cool only. It doesn't need help to get warm... LOL. Friction creates heat.Is the trans cooler in the radiator supposed to cool the trans fluid or warm it?
I'd love a set of reference data, would someone without an external cooler put PID 221940 into their Torque Pro and watch it next time they have to go out for a drive?