47RE 47RH 48RE Transmission Sonnax Extreme Duty Intermediate Shaft 22171B-HD Intermediate shaft failure is common as power levels are increased in Dodge 47RE, 47RH and 48RE units. Sonnax extreme duty intermediate shaft 22171B-HD for high-horsepower street or competition Dodge truck applications is specially heat-treated and processed for maximum strength and resistance to fracture. This shaft features many unique refinements available only from Sonnax, including a torsional design that allows energy to be absorbed, reducing peak loads to critical areas. This shaft is suitable for any high-horsepower street, towing or competition application. Patented modifications to lubrication channel increase lube flow to prevent gear train meltdown Torsional design dissipates peak stress Rolled splines for increased durability Manufactured from 300M ultra high-strength steel for maximum strength and resistance to fracture