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.
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 |
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.
"Pair our input shaft with billet servo pistons to handle 40% faster shifts. 93% of customers report zero slippage after upgrades."
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%.
Get free shipping + 10% discount when ordering before August 30! Our engineers stand by every micron of your upgrade.
Our shafts withstand 200,000+ miles in extreme conditions – 3x longer than OEM.
Yes! All kits include adapter sleeves for C4/4R70W compatibility.
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International layout
Spread all over the world
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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