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2017 5.3 6 Speed Transmission Cooler Lines

DeePa
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DeePa Enthusiast

DeePa

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Posted

All,


I am looking to update my 6 speeds transmission thermostat and recently noticed my trans cooler lines are starting to leak.


GM has part # 85132191 which appears to be the transmission cooler lines as well as the updated thermostat as one part number.

 

Does anyone know any additional information about this?

 

I know the new lower temp thermostat is #86774933 stand alone but if i can purchase the thermostat and lines together I'd save some cash.


Thanks,

 

rav3 Senior Enthusiast

rav3

Posted
Posted

re's link for you on the part. I'm sure there's others too. Just an FYI, this conversion just rec=duces the temp to 70C (158f)   If you do the "pill flip" or the "Superior Solution" you will get a lower trans temp. (my recommendation) Watch this video for the 1st 2 mins where he talks about the TCV. I did the pill flip.

Pipe - GM (85132191)

 

 

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DeePa Enthusiast

DeePa

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I already had the trans replaced at 107 due to TC failure.  Just hit 130k
 

so now I’m trying my best to keep the heat out of it. I plan on doing a pan drop with filter and swap the pan with one with a drain. I’ll drain the fluid in 25k and add fresh. I’ll do that until the filter has around 100k on it and then drop pan again. 
 

this truck has to last me until 300k so everything I do now has that in mind. 
 

it’s a nice SLT crew with the 6.6 bed. They’re out there but not common. Denali cluster. Added Console. Color matches grille, bumpers, mirror caps, door handles. Nice black rims and steps. It’s a clean truck. 

DeePa Enthusiast

DeePa

Posted
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So that part number I posted is the lines, gasket for the side of the trans, and lower temp stat.  
 

im going to run the lower stat as is and I’ll flip the pill in my old stat housing and switch if I still feel the temps are too high. I figure 160 trans temp is okay compared to 195 like currently. Also going to add a deep cast trans pan with drain so I can dump the fluid much easier 

domwrinaldi Enthusiast

domwrinaldi

Posted
Posted

Going to look into the Superior solution!!! Has anyone done this along with the Mishimoto Trans cooler?

DeePa Enthusiast

DeePa

Posted
  • Author
Posted

Just to follow up. 
 

Trans lines weren’t leaking. Oil cooler lines are starting to weep. 
 

installed new trans thermostat (70c) and trans runs under 150 f on the highway at 32-40 ambient.   I plan on adding a deep trans pan with drain in the near future. Truck has 131k. Trans replaced at 107k. This thing has to make 300k and 10-12 years. 
 

heat kills these trans, and stock tune makes it worse with the tcc slip programming. 

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