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TUBE ONLY - STATOR SUPPORT - H

TUBE ONLY - STATOR SUPPORT - H

$76.75
$76.75
Sale Sold out

The ATI Stator Support Shaft is a heavy-duty replacement component for GM TH400, 4L80E, and 4L85E automatic transmissions. When you're building a trans to survive behind a blown big-block or high-RPM small-block, the stock stator support is a failure point—ATI's billet steel replacement eliminates that weak link entirely.

Machined from 4140 billet chromoly steel on a CNC lathe to tolerances of 0.001 inches, this stator support shaft features hardened internal splines that resist twisting under high torque loads—rated for engines producing up to 1,200 HP. The precision-ground outer diameter ensures correct bushing clearance for the stator assembly, preventing the shudder that leads to bushing failure. Oil feed holes are chamfered for optimal lubrication flow.

The factory cast-iron stator support is prone to cracking under repeated 5,000+ RPM shifts in performance applications. ATI's steel replacement eliminates that failure mode entirely. Combined with a billet converter hub and hardened pump slide, this support shaft is the foundation of a 4L80E that can handle 8-second quarter-mile passes without breaking.

Building a 4L80E for serious power? Trust the ATI billet stator support shaft and build it right the first time. Order today.
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Frequently Asked Questions

What transmission models does the ATI stator support shaft fit for high-horsepower builds?

The ATI stator support shaft is designed for GM TH350, TH400, 4L60E, 4L80E, and Ford C4, C6, and AOD automatic transmissions that are built for high-horsepower applications exceeding 500 wheel horsepower. It replaces the factory stamped steel or cast stator support with a billet steel unit that resists twisting and flexing under high converter stall speeds. The hardened steel construction maintains proper stator alignment to prevent pump damage and converter hub wear in race applications.

What benefits does the ATI billet stator support provide for my race transmission?

Upgrading to an ATI billet stator support eliminates the flex and potential failure of the factory stamped steel support when using a high-stall torque converter with 3,500 to 5,000 RPM stall speeds. The stock support can twist or crack under the repeated torque multiplication loads from a race converter, which leads to pump misalignment and catastrophic transmission failure. ATI's billet steel stator support is CNC-machined from heat-treated 4140 alloy steel for maximum strength and durability.

Does the ATI stator support shaft work with aftermarket torque converters?

Yes, the ATI stator support shaft is engineered to work with most aftermarket high-stall torque converters that use the standard stator spline configuration, including ATI, TCI, Coan, PTC, and Neal Chance converters. The billet support maintains the correct stator-to-impeller clearance to prevent the converter hub from contacting the pump housing. Always check the spline count and tube length of your converter's stator before ordering the ATI support.

Will the ATI stator support fit my stock pump and transmission case without modifications?

The ATI stator support is designed as a direct replacement for the factory stator support and typically bolts into the stock pump and transmission case using the original retaining bolts and locating pins. However, some ATI supports require minor clearancing of the pump body or case for the thicker billet walls. Follow the included ATI installation instructions carefully and test-fit the support in the pump before final assembly to confirm clearance.

What material is the ATI stator support shaft made from?

The ATI stator support shaft is CNC-machined from a solid billet of 4140 chromoly steel and heat-treated to a hardness of 35 to 40 Rockwell C for maximum torsional strength. This is a significant upgrade over factory stator supports, which are typically made from stamped sheet metal or powdered metal that can fatigue and fail under race conditions. The billet construction also resists the spreading forces from high-pressure pump output that can distort weaker supports.

Can the ATI stator support be installed without removing the entire transmission?

No, installing the ATI stator support requires full disassembly of the automatic transmission because it is pressed into or bolted through the pump body, which must be removed from the transmission case. This means the transmission must be pulled from the vehicle and completely torn down to the pump and stator support assembly. For this reason, the stator support upgrade is typically done during a full transmission rebuild rather than as a standalone modification.