Heat/humidity= Bogging

jro909 · May 11, 2011

so today is was 92 for the first time this season and again after coming off the highway into stop and go traffic my truck is just sluggish, this happens every summer...the a/c was on...i think it was a member on here that told me it the pcm pulling timing?

4wd · May 11, 2011

Same here! every summer!, and AC on.

It is most noticeable starting 95+, and it is worse when it is 110F 115F...

mine is 2008, same engine, but I also notice trans temp climbs high very quickly to 200+F! and this is dangerous.

jro909 · May 11, 2011

like i drive mostly highway and the trucks fine then but as soon as i get into 25 mph stop and go traffic its like i'm i'm driving and underpowered tank

4wd · May 11, 2011

like i drive mostly highway and the trucks fine then but as soon as i get into 25 mph stop and go traffic its like i'm i'm driving and underpowered tank

That's exactly what I am experiencing...hope to know what exactly is going on and how to fix it...

jandersinc · May 11, 2011

How is 200 degrees dangerous for the transmission?

4wd · May 11, 2011

200F+ while driving in the city and no load whatsoever!, I have seen 210F driving up hell with no load & outside temp was around 80F??, from what I understand, this is not going to break your trans overnight but long term is bad...

180F is normal I think!

chas0218 · May 11, 2011

200F+ while driving in the city and no load whatsoever!, I have seen 210F driving up hell with no load & outside temp was around 80F??, from what I understand, this is not going to break your trans overnight but long term is bad...

180F is normal I think!

Yes around 180* is normal even a little higher. If you look at your tranny cooler and the way it is routed you will notice it goes through the coller first then through the radiator. This is to warm the tranny fluid to keep the tranny from hurting itself with too cool of fluid. The fluid needs to be between 160* and 210* to allow for proper cooling, lubrication, and function.

kdixer · May 11, 2011

Most cars feel sluggish when the AC is working hard to keep the cabin cool. And it is more noticable at slower speeds when airflow is limited. If you hit an on ramp pretty hard to merge on the interstate you will feel a "boost" of sorts when the ECM unlocks the AC compressor clutch above a certain engine rpm. Try it sometime. Just wind out a gear and you can feel the AC clutch unlock. That will give you an idea of how much drag the pump has on the engine.

MaverickZ71 · May 11, 2011

so today is was 92 for the first time this season and again after coming off the highway into stop and go traffic my truck is just sluggish, this happens every summer...the a/c was on...i think it was a member on here that told me it the pcm pulling timing?

My truck does the same thing. Feels like you're pulling a heavy trailer, and you're not. And the first day or two the temp zooms into the mid-90s each year, my 6-speed auto trans slams the shifts like its re-learning what to do. It's not like it's pinging, as I run 89 to 91 octane good gas, so it must be the PCM adjusting itself to the hot weather. Makes me wonder what the heck it would do if it was 110 out and I WAS pulling a heavy trailer!

tanked_darren · May 11, 2011

Same here! every summer!, and AC on.

It is most noticeable starting 95+, and it is worse when it is 110F 115F...

mine is 2008, same engine, but I also notice trans temp climbs high very quickly to 200+F! and this is dangerous.

My transmission heats up when I go hunting to those temps, I used to worry, but theres nothing I can do about it just drive it. I just turn the dic to something else.