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Stage4 Transmission Upgrade Kit Without Torque Converter - GM Allison

In stock
As low as $1,199.99
Have Questions? 714-985-4825

50 State Legal50 States Emissions Legal (E.O. D-701-18)

PPE’s Stage4 transmission kit is our entry-level kit that’s perfect for drag racing, sled pulling, towing or even daily driven use. This kit works extremely well for a stock truck but was engineered to handle a Duramax engine that has been equipped with multiple high performance modifications, such as performance chips, oversize injectors, and/or small nitrous kits.

This kit includes PPE’s triple clutch converter, valve body recalibration kit (recalibration kit does not change shift points, only increases clutch holding power), converter flow valve and upgraded high-friction C1, C2, C3 and C4 clutches with Kolene steels.


Application: GM Allison

Installation Guide: Stage4-5-6 Upgrade_v23C.pdf


  • Billet triple clutch converter (optional)
  • C1, C2, C3, C4 included
  • Valve body recalibration kit, boost valve, pump shim and gaskets
Kits vary by quantity, thickness and material based on your specific transmission needs. Call to discuss your transmission project to ensure you get the most from your build.
Part No. UPC Years
128034201 840171214468 2001-2004
128034202 840171214475 2004.5-2005
128034203 840171214482 2006-2010
More Information
Weight (lbs) 20.0000
Full Dimensions (LxWxH) 15" x 15" x 10"
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