Silverado 6L80E Transmission Thermostat Delete

[CamGTP]

The 8 speed doesn't have the thermostat on the cooler line as far as I know.

[Ltz4 me?]

Hmmm, where is it then?

[Grumpy Bear]

Silverado 6L80E Transmission Thermostat Delete

 

I missed where we traded horses and are now doing an 8 speed. Listen to Cameron. 

[SeekAndDestroy]

2 hours ago, Ltz4 me? said:

Hmmm, where is it then?

I have the 8 speed. To do this mod I used the 6 speed YouTube videos for reference. The thermostat housing looks identical to the 6 speed, and its in the same spot on the tranny. Pretty sure it’s the same part. 

[Ltz4 me?]

What's the temperature difference between factory and deleted that you've noticed?( did you just flip tstat over reinstall the spring then put cap back on with snap ring?)

[Grumpy Bear]

2 hours ago, SeekAndDestroy said:

I have the 8 speed. To do this mod I used the 6 speed YouTube videos for reference. The thermostat housing looks identical to the 6 speed, and its in the same spot on the tranny. Pretty sure it’s the same part. 

Thank you for the conformation. That is helpful.  Very helpful. 

 

 

 

 

Edited September 5, 2020 by Grumpy Bear

[flyingfool]

another tip if your trans "6 or 8 speed" units, is to have the tuner only activate TCC  system on the final two gears of the transmission . this will lengthen the service life of the torque converter and improve shifts.

 

on my 6 speed , driving in M4 has much improved shift points  with the oem tune when compared to using M5 or Drive.  there is also less kick down when going WOT, something worth looking at in the histograms of the tcm. and copyng  over to the 5th thru 6th gears

for more performance tuners dont exceed 25-30% reduction on the Torque managment. i've read they pull about -5 degrees timing between shifts.  more stuff to learn

 

Edited September 6, 2020 by flyingfool

[Grumpy Bear]

On 9/4/2020 at 8:15 PM, Ltz4 me? said:

What's the temperature difference between factory and deleted that you've noticed?( did you just flip tstat over reinstall the spring then put cap back on with snap ring?)

Now that we have conformation.... Depends on the ambient temperature.

I collected this data over several years using two different water thermostats

170 F & 180 F

 

If your still using the 207 F water thermostat your numbers will be higher.

 

Bottom scale is air temperature

Left scale is ATF temperature

Reference is 55 mph

[Ltz4 me?]

Awesome, what will the atf# be with the factory water t stat in place?

I don't understand what the water stat has to do with the tranny temp?2016 Silverado 5.3 8speed have a transmission temperature sensor, do all modern ones have them?

[flyingfool]

trans juice flows thru the engines' radiator for warm up and cooling of the tranny fluid

[Ltz4 me?]

Ok, that makes sense now the coordination between water stat and delete tranny stat

[Grumpy Bear]

3 hours ago, Ltz4 me? said:

Awesome, what will the atf# be with the factory water t stat in place?

 

I guess most see about a thirty plus degree drop. 

[Ltz4 me?]

With just flipping the pill alone?

[Grumpy Bear]

Yes

[Ltz4 me?]

Ok, so how much did you drop extra b/c of the 175deg water stat change in addition to the pill flip?

I wonder with the new synthetic fluid upgrade as the latest TSB if 180-200 is less of a problem in some way due to if let's say this fluid can withstand a higher temp than the standard transmission fluid?