298mm LU (250C, 350C, 200-4R, 4L60 & E), 4L60 (700-R4), 4L60-E, 200-4R (298mm NLU) Performance Converter

298mm Performance Converter Kit
Part No. GM-RK-10

View Instructions

Sonnax 298mm performance converter kit GM-RK-10 for GM 4L60 and 4L60-E 298mm LU applications allows builders to assemble a high performance, non-lockup converter with minimal effort. With the readily available GM 245mm converter cores, a variety of stall speeds can be built using different stator and impeller combinations.

  • Fully machined cover with bushing installed
  • Impeller hub and turbine hub made from 4130 Chromoly steel
  • Oil flow grooves and holes increase fluid flow to keep converters running cooler
  • Turbine hub has a larger flanged diameter to increase the strength and rigidity of the turbine assembly

A similar kit, GM-RK-9, is available for 200-R4, 4L60 and 4L60-E 27-spline applications.

  • Mounting Pad Spacers (3)
  • Thrust Washer
  • Flanged Impeller Hub
  • 30-Tooth Turbine Hub
  • Front Cover Bushing (Installed)
  • Front Cover
  • Pilot Kit
  • Unit Size: 10"
  • Core: GM 245mm
  • Dampered: No
  • Lockup: No
  • Transmission Unit: 4L60, 4L60-E
  • Turbine Hub Input Spline Count: 30

Where to Buy

  • Existing Customers: Contact your sales representative.
  • New Customers: Fill out the form and a sales representative will contact you.
  • 298mm LU (250C, 350C, 200-4R, 4L60 & E), 4L60 (700-R4), 4L60-E, 200-4R (298mm NLU)  Performance Converter 298mm Performance Converter Kit GM-RK-10

Sonnax Performance Converter Kits

Engineered to Deliver Builds that Last

Designed from the ground up to outperform OE and other aftermarket components, Sonnax has you covered with a full line of performance converter kits for gas and diesel vehicles. Offering the widest variety of options in the aftermarket, these innovative kits deliver customized performance and value.

  • Small/Large Diameter
  • Single-Plate/Multi-Plate/Non-Lockup
  • Dampered/Damperless


Choose the right kit for your rebuild!