Sonnax 104690-45, 6L90 Extreme Duty 4-5-6 Clutch Hub & Intermediate Shaft

The ideal upgrade for performance vehicles with 6L90 transmissions, Sonnax extreme duty 4-5-6 clutch hub and intermediate shaft 104690-45 guarantees maximum protection against shaft breakage. The unique hub design improves oil flow and accepts Powerglide-style frictions to optimize clutch durability.

In place of the two-piece shaft/hub, Sonnax uses a much stronger, one-piece design that eliminates the OE assembly’s weak, welded connection. The manufacturer custom forges the one-piece design from ultra high-strength 300M billet steel, then heat-treats peens it for added durability. This combination of features guards against broken 4-5-6 hubs and the risk of rear splines shearing off — chronic failures in performance cars and trucks as well as heavy commercial vehicles.

In 1st, 2nd, and 3rd Gears, and at high RPMs, the NUM0 clutch releases constant oil flow to prevent heat build-up and damage to the clutch frictions. Furthermore, The unique, upgraded design of the Sonnax hub doubles oil flow to the clutches for significantly more protection against heat build-up and clutch failure, especially compared to other aftermarket shafts that reduce oil flow.

For best performance, use with Sonnax steels 104120-01 or 104120-02 and BorgWarner high-energy frictions 104120-03.

• Rugged, one-piece design eliminates the weak connection where two-piece hub/shaft assemblies fail
• High-strength, 300M steel forging is heat-treated and shot-peened for maximum durability
• Doubles oil flow to the clutch pack for greatly improved resistance to heat and longer clutch life
• Eliminates OE dampener
• Use with Powerglide-style frictions, Sonnax steels and high capacity piston kit 104960-20K