CaleDeRoo wrote: ↑Mon Sep 09, 2019 9:06 am
It was supposedly Colorado specific fluid and GM fucked it up twice before contacting Mobil 1 to start making it. My friend says he has multiple cases laying around because GM sends more than it take to do the job and it's not used for any other vehicle.
Odd, considering the C7 Vette and Camaro (and other vehicles with this trans) suffer the same malady.
So does the fix actually fix it or is there any actual damage that is caused from the OEM fluid that goes in it? I.e.- bearings going bad, torque convertor impeller blades melt, spontaneous spawning if feral cats in the planetary gears....
CaleDeRoo wrote: ↑Mon Sep 09, 2019 9:06 am
It was supposedly Colorado specific fluid and GM fucked it up twice before contacting Mobil 1 to start making it. My friend says he has multiple cases laying around because GM sends more than it take to do the job and it's not used for any other vehicle.
Odd, considering the C7 Vette and Camaro (and other vehicles with this trans) suffer the same malady.
Huh. He works at the largest Corvette dealer in the State and I don't think I've ever heard him tell me of a Camaro or Corvette coming in for this service. So maybe they use a different fluid?
Odd, considering the C7 Vette and Camaro (and other vehicles with this trans) suffer the same malady.
So does the fix actually fix it or is there any actual damage that is caused from the OEM fluid that goes in it? I.e.- bearings going bad, torque convertor impeller blades melt, spontaneous spawning if feral cats in the planetary gears....
There is actual damage that was occurring even after the new GM fluids which ended in torque converter replacement, but usually only after three flushes with the shitty fluid would they actually do that for someone. From what he told me this weekend that trucks that are getting the Mobil fluid for the first flush are doing better.
Melon wrote: ↑Mon Sep 09, 2019 9:41 am
Hoping this is a long term fix, and mine only was shuddering for maybe 1k miles.
I'd like to keep the truck long-term.
What's weird is how random it is. My truck at 18.6k miles is showing ZERO symptoms of shuddering. It's been fantastic, and I really wouldn't hesitate keeping it long term.
Desertbreh wrote: ↑Tue Oct 10, 2017 6:40 pm
My guess would be that Chris took some time off because he has read the dialogue on this page 1,345 times and decided to spend some of his free time doing something besides beating a horse to death.
Melon wrote: ↑Mon Sep 09, 2019 9:41 am
Hoping this is a long term fix, and mine only was shuddering for maybe 1k miles.
I'd like to keep the truck long-term.
What's weird is how random it is. My truck at 18.6k miles is showing ZERO symptoms of shuddering. It's been fantastic, and I really wouldn't hesitate keeping it long term.
Over 20k on mine.
I had a thought that it might be related to commute times. My commute has always let the trans get up to temp and be there for awhile before shutting down.
Melon wrote: ↑Mon Sep 09, 2019 9:59 am
20k is about where mine started.
Desertbreh wrote: ↑Tue Oct 10, 2017 6:40 pm
My guess would be that Chris took some time off because he has read the dialogue on this page 1,345 times and decided to spend some of his free time doing something besides beating a horse to death.
Upon reading some of the complaints, the major problem people worry about is metal shavings being pushed thru the system which cause the need for a replacement torque convertor, valve body, or the transmission as a whole.
Detroit wrote: ↑Mon Sep 09, 2019 9:47 am
What's weird is how random it is. My truck at 18.6k miles is showing ZERO symptoms of shuddering. It's been fantastic, and I really wouldn't hesitate keeping it long term.
Over 20k on mine.
I had a thought that it might be related to commute times. My commute has always let the trans get up to temp and be there for awhile before shutting down.
Over 20k on mine.
I had a thought that it might be related to commute times. My commute has always let the trans get up to temp and be there for awhile before shutting down.
what temp did your trans get to?
Depending on ambient temp and airflow it’ll sit between 120 and 140 on a regular basis.
Depending on ambient temp and airflow it’ll sit between 120 and 140 on a regular basis.
thats WAY low for an auto. Everything i know of autos and have read says they should operate from 180-220. 230 is higher. After 250 things are cooking.
Depending on ambient temp and airflow it’ll sit between 120 and 140 on a regular basis.
thats WAY low for an auto. Everything i know of autos and have read says they should operate from 180-220. 230 is higher. After 250 things are cooking.
This seems to be the temp this 8AT sits at in the Colorado’s...
thats WAY low for an auto. Everything i know of autos and have read says they should operate from 180-220. 230 is higher. After 250 things are cooking.
This seems to be the temp this 8AT sits at in the Colorado’s...
yeah, thats what i talked to alan about. Temp stays too low to remove/boil any moisture out.
Big Brain Bradley wrote: ↑Mon Sep 09, 2019 4:01 pm
I suspect these low temps are just measured or reported from bad place, ie post transmission cooler. They usually have thermostats too
That's a good point, maybe point an infared gun at the housing?
4zilch wrote: ↑Mon Apr 12, 2021 8:46 am
I'm a fucking failure.
This could likely be the root of the 8AT issues, maybe the switch to Mobil1 is designed to work at a lower temp?
Water still boils at 212f
Also much less moisture in trans fluid vs engine oil.
If I guessed it’s probably an incompatibility between the fluid and the TCC material and is either aggravated by certain operating conditions or there’s a supplier issue.... or a combination there-of.
As the only published author in a well-known motorcycle publication in the room...
nailed it.
