The ideal upgrade for performance vehicles with GM 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 one-piece design is custom forged from ultra high-strength 300M billet steel, then heat-treated and shot peened 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.

The 4-5-6 clutch is released in 1^st, 2^ndand 3^rdGears, and at high RPMs, constant oil flow is required across the spinning clutch frictions to prevent heat build-up and damaged clutches. 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 thatreduceoil flow.

自Powerglide-style 45-tooth摩擦是一个popular 6L90 upgrade due to their wider friction surface, this extreme duty shaft features that style of smaller-diameter hub. For best performance, use with Sonnax custom steels104120-01,104120-02and BorgWarner High Energy Frictions104120-03。安装Sonnax极端职责4-5-6离合器毂和中间轴需要使用Sonnax高容量4-5-6活塞，涂抹套件104960-20K。

• 坚固的单件式设计消除了两件式毂/轴组件失败的弱连接
• 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
• Designed for use with Powerglide-style, 45-tooth frictions and Sonnax steels
• Eliminates OE dampener