Impeller hub failure is common in 6R140 converters regularly pushed to the limit. Sonnax offers flanged impeller hub FD-90-140G to replace worn or damaged hubs. Proprietary heat-treating delivers a high degree of hardness where the bearing rides, while forged chromoly ensures user-friendly welding. This impeller hub also features an aftermarket first: hardened internal splines to support PTO drive.

Heat-treated external splines (pump drive)
Heat-treated internal splines (PTO)
Hardened journal diameter to OE specifications
Chromoly for user-friendly welds without cracking or warping
Oversized piloting diameter ensures proper alignment

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