Dodge 6.7L Cummins Diesel 68RFE Overdrive Hub and Clutch Housing Upgrade 2007-17

DODGE RAM 68RFE

Overdrive Hub (72570-01) and Clutch Housing Upgrade (No Clutches)

Fits 2007–2017

6.7L Cummins Diesel Pick-Up Trucks

Part Number: 72960-16KBLK

Heavy-duty Dodge trucks running 400–600HP or towing large loads are prone to overdrive clutch failure due to the stock transmission’s limited clutch capacity and fragile OE components.

Thin (.034") single-sided clutches distort under heat and torque, throwing clutch pack clearance out of spec and leading to inevitable burnup.

The Sonnax Smart-Tech® Overdrive Clutch Housing Kit (72960-16K) solves this with a billet aluminum housing that accommodates a taller clutch pack, increases OD apply area by 16%, and boosts steel mass by 28% for superior heat dissipation.

Key Benefits

• 20% more clutch capacity with larger clutch pack
• 16% more OD apply area for firmer, controlled shifts
• 2X thicker steels and double-sided clutches for 28% more steel mass
• Bolt-on anchor plate prevents clutch pack flexing and heat buildup
• Compatible with Sonnax line pressure booster kit RFE-LB1 for enhanced performance

Note: This kit replaces Sonnax 72960-06K and includes longer flange-head screws for better clamping force.

Kit Contents

• Overdrive/Reverse Housing
• Lip Seal
• Adapter Sleeve
• UD/OD Reaction Plate
• Anchor Plate Shims (2)
• Bolt-On Anchor Plate
• Screws (12)
• Chisel

Part Number: 72570-01

OE Part No.: 52119776AA

Overdrive clutch hub and shaft failure is common in Chrysler 66RFE and 68RFE transmissions, even in stock setups. Cracks begin at lubrication cross holes and spread, causing catastrophic gear train failure.

The Sonnax heavy-duty hub and shaft (72570-01) is cryogenically treated and shot-peened to stabilize steel and reduce crack formation. It’s a direct replacement for all 66RFE and 68RFE units.

Hub & Shaft Features

• Cryogenically treated for enhanced durability
• Shot-peened lubrication cross holes for crack resistance
• Superior load capacity and reliability