ProLine 4000 Automatic Transmission Assembly by Transmission Specialties®.

SKU: 2512-4000

The Proline 4000 has all the features as the Proline 5000 but is built with a stock PG case. It is rated to 1600+ HP. Designed utilizing the latest technology, this product by Transmission Specialties features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is manufactured to meet or exceed stringent industry standards. Designed for those drivers who want only the best when it comes to their vehicle’s transmission system, this state-of-the art automatic transmission assembly provides superior performance and extreme durability to meet or exceed the toughest industry standards.

Disassembly Process and Cleaning

  • Complete disassembly of the entire transmission, all wearable “soft parts” are discarded.
  • Casing and housings are washed in our 190-degree hot wash tank.
  • Hard parts are thoroughly inspected and then either discarded or hand washed
  • Casing is thoroughly checked for any cracks or damage
  • Factory Casing is fully sand blasted

Upgraded Internal Components

  • Quality Checked Rebuilt Factory Powerglide Case
  • Rollerized Tail Housing
  • Rollerized Output Support
  • New 1.80 or 1.69 Straight Cut Gearset (factory carrier housing and output shaft reused)
  • New High Clutch Drum
  • Billet High Clutch Apply Piston
  • 8 Alto Red Eagle High Clutches with Performance Steels, Oversized Piston Design with over 33% additional clamping force. Torque capacity exceeds that of a 10 clutch drum without the extra drag of the two additional clutches.
  • Billet High Clutch Hub
  • New Billet High Clutch Flange Plate
  • New TSI Performance Wedding Band Bushing
  • Billet AERMET 30 Spline With Rings Turbo Input Shaft
  • Billet 4340 Output Shaft
  • Billet Reverse Piston
  • Alto Red Eagle Reverse clutches
  • High Performance, NEW Low Band
  • Billet Dual Ring Servo
  • Heavy Duty Band Strut, Anchor and Apply Pin
  • Billet Servo Cover
  • TSI Exclusive SS304 Servo Feed Tube
  • Billet Aluminum TSI exclusive Transbrake Valve Body
  • New Cast Pump Body
  • New Pump Gears
  • New One Piece Stator and Tube TSI High Pressure Pump
  • All New External Fasteners
  • Deep Aluminum Pan w Drain Plug
  • Valve Body is Completely Dyno Tested
  • New High Performance Bushings
  • All New Gaskets and Seals
  • Factory Case is Fully Inspected and Verified to Perform Like New
  • Endplay and Clearances Set to Exacting TSI Performance Specifications


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