CATTransmission Parts

391-9017 Universal Joint Drive Shaft — Cat 966L 966M

This universal joint drive shaft connects the transmission or transfer case to the drive axle, transmitting torque through changing angles. Constructed with high-strength steel and precision-balanced, it ensures smooth power transfer and minimizes vibration compared to a worn or damaged shaft. Operators may notice clunking noises during acceleration or deceleration, or excessive vibration when this component fails.

Universal Joint Drive Shaft – Part No 391-9017 – CAT Spare Part
Part Specifications
BrandCAT
CategoryTransmission Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Drain and replace transmission fluid when servicing internal components. Use correct ATF specification. Pre-fill torque converters with fluid before installation. Allow 10 minutes for fluid to settle before checking level.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeUniversal Joint Drive Shaft
MaterialHardened Steel
ApplicationDrivetrain Power Transmission
Service LifeReplace as needed based on inspection
CompatibilityOEM specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

A clunking sound when shifting between drive and reverse, or during acceleration and deceleration, often indicates a worn universal joint in the drive shaft. If left unaddressed, the U-joints can seize or break, leading to severe vibration and potential loss of drive. Continued operation risks damage to the transmission and differential.

Installation Tip

Mark the alignment of the drive shaft flanges before removal to ensure it is reinstalled in the same phase. Ensure all bolts are torqued to specification and that the slip yoke is properly greased.

Service Note

Inspect universal joint bearings for play, center support bearing for wear, and ensure proper alignment of all components.