4R70W Hardened Input Shaft - High-Strength Performance & Durability Upgrade
Did you know 68% of 4R70W transmission failures stem from worn input shafts? While you push your vehicle to the limit, a weak 4R70W hardened input shaft could cost you $1,200+ in avoidable repairs. Discover why elite builders trust hardened components to survive 400+ lb-ft torque.
Why Our Hardened Input Shafts Outperform Competitors
Our 4R70W hardened input shaft undergoes 3-stage cryogenic treatment (-300°F) and CNC grinding to 58-60 HRC hardness. Compare that to stock 28-32 HRC shafts failing at 350 hp. See the proof:
| Feature | Ours | C4 Hardened Shaft |
|---|---|---|
| Surface Hardness | 58-60 HRC | 52-54 HRC |
| Warranty | 5 Years | 2 Years |
Custom Solutions for Your 4R70W Speedometer Drive Gear
Need a 4R70W speedometer drive gear that matches your 30-spline setup? Our laser-etched gears maintain ±1% accuracy even at 7,000 RPM. Install in 90 minutes with our reverse-engineered kits.
Pro Tip:
"Pair our input shaft with billet servo pistons to handle 40% faster shifts. 93% of customers report zero slippage after upgrades."
25 Years of Trust: Why Builders Choose Us
When your C4 hardened input shaft must survive desert racing or 1,500-hp dragsters, our ISO 9001-certified manufacturing delivers. Join 14,000+ certified installers who reduced comeback rates by 81%.
Ready to Eliminate Input Shaft Failures?
Get free shipping + 10% discount when ordering before August 30! Our engineers stand by every micron of your upgrade.
FAQ 1: How long does a 4R70W hardened input shaft last?
Our shafts withstand 200,000+ miles in extreme conditions – 3x longer than OEM.
FAQ 2: Will this work with my C4 hardened input shaft setup?
Yes! All kits include adapter sleeves for C4/4R70W compatibility.
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Transmission GearPower transmission: the engine operation drives the input gear on the input shaft to rotate, the input gear engages with other gears, and relies on the interaction between teeth and teeth to transfer the power to the intermediate gear (if any) and the output gear, and finally transfers the power to the driving wheel and other components through the output shaft to make the vehicle or equipment move.
Variable speed principle: Change the transmission ratio by meshing gears with different numbers of teeth. For example, when the big gear drives the small gear, the speed of the small gear will be faster than the big gear, but the output torque will be smaller, to achieve growth and torque reduction; On the contrary, when the pinion drives the big gear, the speed of the big gear slows down, the torque increases, and the torque increases. In this way, transmission gears enable the vehicle or equipment to obtain the right speed and torque under different working conditions -
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our products are exported to various parts of the world. Currently, our products have been exported to more than 40 countries Our products cover Asia, Europe, Africa, South America, North America, and Oceania
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