10R140 upgrades -- t-stat bypass etc?

[D60]

Is a thermostat bypass recommended on the 10R140? I see PPE offers something (although so do others):
https://ppepower.com/products/trans...valve-2020-2025-ford-super-duty-10r100-10r140

What about valve body concerns? Is something like a Next Gen valve body warranted?

I've got a client who wants to make his last as long as possible behind a 6.7, but he's only at 17k miles right now. He does tow a skidster, dump trailer etc.

I feel like @clinebarger upgrades a lot of *80 half-ton units, but I seem to hear less about the heavy duty 10 speeds?

 

[SwampSurvivor]

I'm in a few superduty groups on facebook and SO many people complain about the 10R140. Is it really that bad of a transmission?

They definitely like to run warm. I rented a GM 2500HD with the 10 speed ( Believe they are related as well as the lighter 10 speed) and it liked to be around 200-220 all the time.

 

[bdcardinal]

Flying Wrenches channel on YT is a former Ford tech and has his own shop now that does a lot of 10R rebuilds. I think he uses Raybestos frictions and steels.

 

[wwillson]

They definitely like to run warm. I rented a GM 2500HD with the 10 speed ( Believe they are related as well as the lighter 10 speed) and it liked to be around 200-220 all the time.

The 10L1000 in my Chevy 3500 runs at 146F virtually all the time. I have seen it at almost 200F one time under extreme uphill (10% grade) towing a 20,000 pound trailer.

 

[MrHorspwer]

They definitely like to run warm. I rented a GM 2500HD with the 10 speed ( Believe they are related as well as the lighter 10 speed) and it liked to be around 200-220 all the time.

That hasn't bee my experience. Like, at all.

Here's a photo of my 2024 2500HD w/ 10L1000. 40ish mile drive at 57F ambient temp and the transmission temp barely crested 140F. This is the normal. The thermal bypass isn't even open at this temp.

Pulling my travel trailer, the highest temp I think I've ever seen has been a tick over 170, which is right about when the bypass opens.

For giggles, the second photo is a datalog of my previous 1500 towing my previous travel trailer. You can tell too: Coolant temp is 217 and oil temp is 226. She's working. Transmission temp is only 187.

There is nothing wrong with having a thermal bypass. These temps are all perfectly normal. Now, if they fail and get stuck closed, that's a problem.

 

[clinebarger]

Is a thermostat bypass recommended on the 10R140? I see PPE offers something (although so do others):
https://ppepower.com/products/trans...valve-2020-2025-ford-super-duty-10r100-10r140

What about valve body concerns? Is something like a Next Gen valve body warranted?

I've got a client who wants to make his last as long as possible behind a 6.7, but he's only at 17k miles right now. He does tow a skidster, dump trailer etc.

I feel like @clinebarger upgrades a lot of *80 half-ton units, but I seem to hear less about the heavy duty 10 speeds?

How hot does the unit run fully loaded up a grade?

I like Next Gen steel clutch control valves & nobody else makes replacements for the craptastic anodized aluminum factory valves, The kit also eliminates the LPC Signal Damper altogether....The Damper Piston can stroke 100's of times a second & wears really quickly.
The Linear Force Solenoids like to move around & wear the valve body casting, Stabilizing inserts also come in the kit.

 

[clinebarger]

Flying Wrenches channel on YT is a former Ford tech and has his own shop now that does a lot of 10R rebuilds. I think he uses Raybestos frictions and steels.

The Raybestos GPZ line is all the rage right now, I can say with confidence that the GPZ's do not outperform Borg Warner Hi-Energy frictions that come stock in all Ford & GM 10 speeds.

Raybestos steels are wildly inconsistent....To the point I don't bother using them on any transmission.