Parts for your 2006 Toyota Bb-Thrust bearing

2006 Toyota bB thrust bearing – is it actually a thing?

Short answer: a clutch thrust (release) bearing isn’t used on the 2006 Toyota bB. The 2006 model is the second‑generation bB (chassis codes QNC20/21/25) and it was built with a 4‑speed automatic transmission (Super ECT) only, not a manual. Because there’s no manual clutch, there’s no clutch release/thrust bearing to replace.

This isn’t just hearsay. Technical sources including Toyota’s New Car Features and Repair Manual for the QNC20 series, the Toyota Electronic Parts Catalogue (EPC) for QNC2# models, and period Toyota sales brochures all list a 4‑speed automatic as the transmission fitted from factory. Reference summaries such as the second‑gen Toyota bB spec sheets and encyclopaedia entries also note “4‑speed automatic only”. With no manual option, a throwout/thrust bearing simply doesn’t appear in the parts listing for this vehicle.

What sometimes causes confusion is that the engine itself does have crankshaft thrust bearings (integral with the main bearings) to control end‑float. Those are internal engine components, not part of the clutch system, and they aren’t a routine service item. They’re only checked or replaced during a bottom‑end rebuild or if there’s a known issue like excessive crank end‑play.

If someone’s shopping for a “thrust bearing” for a 2006 bB, they’re likely seeing a generic listing that suits manual‑trans variants of related models, or a listing for engine main/thrust bearings used during an overhaul. For day‑to‑day ownership and servicing of a 2006 bB, there’s no clutch thrust bearing to worry about.

Chasing a noise that sounds like a bad throwout bearing? On an auto bB, look instead at:

• Torque converter or flexplate noises when selecting Drive
• Idler pulley, alternator, or A/C compressor clutch bearings under the bonnet
• Front hub or strut top bearings if the noise follows road speed or steering input

Bottom line: for the 2006 Toyota bB with its factory automatic, a clutch thrust bearing isn’t relevant. If an engine rebuild is on the cards, your engine builder will handle the crankshaft thrust bearing selection and clearances per the Toyota Repair Manual specs.

Popular questions

Does a 2006 Toyota bB have a clutch thrust/release bearing?
No. The 2006 bB is automatic‑only, so there’s no clutch and no release (thrust) bearing. The only “thrust” parts on the car are the crankshaft thrust bearings inside the engine, which aren’t serviced during normal maintenance.

What could mimic a bad thrust bearing noise on an automatic bB?
Common culprits include torque converter shudder or flexplate rattle when shifting into Drive, accessory drive bearings (idler, alternator, A/C clutch), or chassis items like front hub bearings and strut top bearings. A quick isolation test with the belts off (briefly) and a careful listen in Park vs Drive can help point the way.

Can a manual gearbox be swapped into a 2006 bB to use a clutch thrust bearing?
It’s a big job and not common. You’d need the correct transmission, pedal box, hydraulics, ECU/loom changes, mounts, flywheel and clutch hardware, and certification. For most owners in Aus/NZ, it’s more cost‑effective to maintain the factory auto or choose a model that came with a manual from new.