Parts for your 2018 Toyota Rav4-Universal joints

2018 Toyota RAV4 universal joints: what’s fitted and how they’re serviced

Based on Toyota’s own technical literature and parts catalogues, universal joints (U‑joints) are not fitted on front‑wheel drive 2018 RAV4 models, they use CV joints only. On 2018 RAV4 AWD models, the propeller shaft between the transfer/Power Take-Off Unit and rear differential uses factory‑staked, non‑greaseable U‑joints with a centre support bearing. References: Toyota RAV4 2018 Repair Manual (Toyota TIS) – Drivetrain/Axle: Propeller Shaft section, Toyota Electronic Parts Catalogue (EPC) listings for the propeller/drive shaft assembly specifying integral spider bearings (U‑joints).

On AWD 2018 RAV4s, the universal joints sit on the prop shaft and let the driveline transfer torque smoothly from the front to the rear even as angles change with suspension movement. They’re the workhorses that help keep things quiet and tidy at highway pace and on rougher Kiwi and Aussie roads. Unlike the wheel half‑shafts that use CV joints, these U‑joints are sealed at the factory and not designed for periodic greasing.

Toyota specifies the prop shaft assembly as a replace‑as‑a‑unit item if a U‑joint or the centre bearing develops play or binding. That’s why good servicing is more about inspection than lubrication. During routine servicing, a technician should check for free play at each yoke, look for rust bleed around the bearing caps, and spin the shaft to feel for any notchiness. Fasteners at the flanges should be checked for torque, and the centre bearing rubber inspected for cracking or sagging.

Drivers will usually notice a failing U‑joint as a clunk when shifting from reverse to drive, a shudder on take‑off, or a vibration that comes in at certain speeds and loads. A light chirp that changes with road speed can also be an early hint. Left alone, a worn joint can hammer the flanges and take out the centre bearing, so it pays to sort it sooner rather than later.

When replacement’s due, best practice is to mark the flange positions to preserve balance, follow Toyota’s torque specs, and use new flange bolts where specified. Because the OEM joints are staked, pressing in loose replacement caps isn’t recommended, most workshops fit a complete genuine or quality aftermarket prop shaft. After installation, a road test for vibration under load and on overrun is essential.

• FWD 2018 RAV4: no U‑joints fitted (CV half‑shafts only).
• AWD 2018 RAV4: prop shaft uses sealed, non‑serviceable U‑joints.

FAQs

Do all 2018 RAV4s have universal joints?
No. Only AWD variants have U‑joints on the propeller shaft. FWD models don’t have a prop shaft and rely solely on CV joints at the front wheels.

What are the signs the RAV4’s U‑joints are worn?
Common signs include a driveline clunk when selecting gear, a take‑off shudder, speed‑related vibrations, and sometimes a chirping noise that rises with road speed. Any of these warrant an inspection.

Can the U‑joints be greased or replaced separately?
The factory joints are sealed and staked, so Toyota’s service information calls for replacing the prop shaft assembly if a joint or centre bearing is faulty. Some aftermarket shafts or rebuilds exist, but the OEM path is a complete unit for reliability and balance.