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
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