T3 & T4 Left Hand Threadform

Garrett has replaced right hand threadform with left hand threadform turbine wheel assemblies for models T3 and T4. The left hand threadform is identified by a hex shaft nut (indicating left hand) rather than the 12-point shaft nut (indicating right hand) on turbocharger assemblies and CHRA’s.

Advantages of Left Hand Threadform

Shaft nut loosening under load is virtually eliminated
A true quality improvement – reflects latest generation wheel design technology
Improved balance tolerance – thrust collar vapour blast eliminated
Fewer turbine wheels to inventory due to part number standardization efforts
No need for costly spiralock shaft nut

T3 & T4 Left Hand Threadform

Advantages of Left Hand Threadform

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