Sonnax HD 2-3 Shift Valve
Product ID: 24710278
⏳Extends clutch & sprag life
🎮Optimized for paddle shifters
⚙️Drop-in replacement ease
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⚙️ Shift smarter, last longer—upgrade your drive with Sonnax precision!
The Sonnax HD 2-3 Shift Valve is a metal drop-in replacement designed to enhance transmission performance by applying the overrun clutch in 1st, 2nd, and 3rd gears, unlike factory valves. This innovation extends the life of the forward clutch and input sprag, especially in heavy-duty and high-performance vehicles. Perfectly compatible with aftermarket electronic paddle shifters, it delivers firmer, more noticeable downshifts and improved engine braking, making it a must-have upgrade for professionals seeking durability and precision in their drivetrain.
| ASIN | B00BYG7S5E |
| Best Sellers Rank | #1,534,191 in Automotive ( See Top 100 in Automotive ) #2,770 in Automotive Replacement Transmission Hard Parts |
| Brand | Sonnax |
| Brand Name | Sonnax |
| Customer Reviews | 4.7 out of 5 stars 64 Reviews |
| Exterior Finish | Metal |
| Inlet Connection Size | 4.2 Inches |
| Inlet Connection Type | Flare |
| Item Dimensions | 5.8 x 4.2 x 0.5 inches |
| Item Weight | 0.01 Ounces |
| Item dimensions L x W x H | 5.8 x 4.2 x 0.5 inches |
| Manufacturer | Sonnax |
| Manufacturer Part Number | 77754-41 |
| Material | Metal |
| Material Type | Metal |
| Model Number | 77754-41 |
| Outlet Connection Size | 4.2 Inches |
| Outlet Connection Type | Flare |
| Size | 4.2 x 5.8 x 0.5 inches |
| Unit Count | 1 Count |
| Valve Type | shift valve |
J**Y
What can I say except, It's Sonnax !!
Sweet valve, when you're in D3 this valve makes your overrun clutches come on in 2nd and 3rd gear also. I wasn't crazy about drilling a small hole in my valvebody, but they are plentiful if you mess it up or if you ever want to go back to stock. Kind of causes a harsh 2nd to 3rd downshift while coming to a stop, but while you are in D4 can't tell any difference. Look on the internet if you're not sure where to drill, took me picture after picture before I finally decided where to drill.
J**N
Nice for towing
Used during 4l60e rebuild along with complete Sonnax Servo and performance pack. It may seem pricey to purchase all but it seems to have hell of a lot of holding power. Converter lockup now is unreal. No flair during shifts. Down shifts are nice and noticeable along with this item installed. Makes it nice Slowing down while towing. Shifts are firm and noticeable from 1-2 but the rest are quick with no flair or lag. I’m very pleased with complete package. Items were Installed on 1/2 ton 4x4 suburban.
S**1
Four Stars
works amazing and shifts awesome!
D**.
Sonnax is $
You can't go wrong with the R&D that Sonnax puts into all their products!
S**N
I would buy again and I always recommend these to friends now with tired transmissions
This really helped the 2-3 shift flare in the 4L60e. I would buy again and I always recommend these to friends now with tired transmissions.
J**N
SONNAX... YES!!!
Great selection of upgrade parts to strengthen and correct known 4L 65e transmissions
D**D
Sonnax
Great product as always
T**T
Five Stars
perfect
Trustpilot
2 months ago
1 month ago