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GM Truck
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22-24 6.2L V8
Transmission Valve Bodies
19-24 Silverado & Sierra 1500 SunCoast 10L80 Valve Body Kit
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2019-2024 Silverado & Sierra 1500 SunCoast Pro-Loc Valve Body & Pump Kit for 10L80 Transmissions
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Part Number:
SC-10L80-PVB
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19-24 Silverado & Sierra 1500 SunCoast 10L80 Valve Body Kit
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Call 602-399-5484 for Availability
2019-2024 Silverado & Sierra 1500 SunCoast 10L80 Pro-Loc Valve Body & Pump Kit Features:
The Pro Loc Valve Body and Pump Combo
The factory 10L80 transmission lock-up circuit is an impressive one, in that it can make converter lockup seem somewhat uneventful. The refinement in its engagement is definitely next-level to what we have seen in the past. As nice as this feels in reference to the NVH (Noise Vibration Harshness), when we start introducing situations where the load demands are testing the limits or outside what the vehicle was initially designed for, it can become a huge problem.
In our SunCoast 10L80 Pro Loc Valve Body we are specifically looking to decrease the time from initial lock-up apply to zero turbine slip. In doing this, we are changing the lockup circuit by replacing the torque converter clutch (TCC) valve in order to increase lockup holding apply fluid pressure. The lockup oil transition time is also improved by modifying critical oiling circuits for the fluid to reach the TCC clutch, resulting in quicker apply time, and therefore, reducing TCC clutch degradation. By reducing degradation per apply cycle, we are allowing for improved reliability and performance.
(NOTE: For maximum results in power levels exceeding 800HP, it is highly recommended that the TCC apply offset be changed in the factory file calibration)
The next facet we address is the lube circuit. The lube circuit on the 10L80 transmission is responsible for supplying oil to the planets, clutches, bushings, etc. From the factory, the lube circuit oil is dispersed throughout the transmission as low as 6 PSI. Under normal load demands, this is perfectly acceptable. In more stressful and demanding situations, an increase in lubrication to clutches, steels, planets is ideal for removing heat and dealing with the increased demands.
In our 10L80 Valve Body we are specifically addressing this circuit from 6 PSI to a whopping 20 PSI. This is a 250% improvement from the factory calibration, resulting in reduced frictional heat generated. This reduction in heat helps lessen pre-mature failure that can become increasingly evident in high horsepower applications.
Another modification to our SunCoast Pro Loc 10L80 Valve Body involves the regulator valve (latch valve) circuit. This oil circuit is responsible for fully engaging the clutches, allowing for full clutch line pressure. In factory form, the regulator valve we are specifically targeting is responsible for A, B, C, and F clutch packs. Of course, our primary clutch pack concern is the 'F" clutch, which tends to be the first and most prominent clutch pack failure with the 10L80 in higher horsepower or more demanding environments.
In a factory 10L80 valve body calibration, the regulator valve (latch valve) becomes fully engaged, allowing full fluid flow for engagement at 120 psi. When this occurs, the oncoming clutch pack has maximal clamping force. When the clamping force is engaged to max capacity, we ascertain the greatest static and dynamic holding capacity. In stock form or even mildly modified vehicles, this is perfectly suitable; however, when we expose the vehicle to a more demanding environment this can be a weak link.
With our SunCoast 10L80 Valve Body and Pump Combo we are decreasing the required pressure to fully engage the regulator to only 80psi. This is a 33% decrease in pressure needed to maximally engage the clutch regulator valve (latch valve) resulting in a quicker shift apply when engaging clutches A, B, C and F. This quicker engagement not only shortens shift times, but it also decreases the heat resonating in the clutch pack, preventing premature degradation and extending clutch life. To improve this shift calibration even more SunCoast is evacuating non-critical oil to increase apply rate.
The factory overall line pressure is modified on this new SunCoast Valve Body and Pump combo. SunCoast is increasing overall main line pressure as much as 60psi. This additional line pressure not only increases maximal clamping force of the individual clutch packs but increases overall pump volume production. To reduce the potential for runaway pressure and the over-compression of clutch fibers, the SunCoast 10L80 Valve Body does have a built-in bypass, dumping excessive pressure above 420psi.
Features and Benefits
Increased Line Pressure, as much as 60psi
Increased clamping force on all clutch packs
250% Increase in Cooler Charge Pressure
Increased Lock-up Apply Pressure
33% Decrease in Maximal Pressure Actuation of Clutch Packs
Shortened Shift Times
Improved Clutch Wear
Fitment:
2019-2024 Silverado 1500 6.2L with 10L80 transmission
2019-2024 Sierra 1500 6.2L with 10L80 transmission
2019-2024 Silverado 1500 5.3L with 10L80 transmission
2019-2024 Sierra 1500 5.3L with 10L80 transmission
2019-2024 Silverado 1500 3.0L Duramax with 10L80 transmission
2019-2024 Sierra 1500 3.0L Duramax with 10L80 transmission
For 10L80 transmissions only:
this valve body and pump kit will only fit Silverado and Sierra 1500 models with 10-speed 10L80 transmissions. It will not fit 8-speed 8L80 transmissions or 6-speed 6L80 transmissions. Please verify your vehicle's transmission type before ordering.
Q:
Please let me know on availability for 10l80 valve body upgrade Thank you
Asked by:
Nathaniel Merrett
- 5/26/2025
A:
Unfortunately, we do not have a definitive ETA from SunCoast on these. SunCoast is at the mercy of GM in getting the latest generation cores, but GM has only been trickling the things out.
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