Parts for your 2018 Subaru Exiga-Universal joints

2018 Subaru Exiga universal joints (U-joints): what they do and how to look after them

Based on Subaru’s service literature for the Exiga/Crossover 7 (Drive Shaft System – Propeller Shaft, 2015–2018) and the Subaru Japan Electronic Parts Catalogue for the YA-series, the 2018 Subaru Exiga runs Symmetrical AWD with a two‑piece propeller shaft that uses sealed, non‑greaseable cross‑type universal joints and a centre support bearing. So yes—universal joints are fitted and relevant to this model.

On the 2018 Subaru Exiga, the universal joints sit in the prop shaft between the transmission and the rear diff. Their job is to let the shaft change angle as the driveline moves, while still delivering smooth torque to the rear wheels. That flexibility keeps the AWD system happy under acceleration, over bumps and through load changes, helping reduce vibration and protecting other driveline parts.

Because Subaru specifies sealed, maintenance‑free U‑joints on the Exiga propeller shaft, there’s no greasing nipple and no periodic lubrication. What matters is regular inspection. During routine servicing (about every 12 months or 20,000 km), a quick check on a hoist goes a long way:

• Feel for play or notchiness at each U‑joint and look for rust‑stained grease weeping from the bearing caps.
• Inspect the centre support bearing and its rubber mount for cracks or sagging.
• Check flange bolts for tightness and look over the shaft for dents or missing balance weights.
• Keep an eye on engine and transmission mounts—excess movement can shorten U‑joint life.

Common signs of wear include a clunk when taking off, a shudder under load around 40–80 km/h, or a chirp/whirr on overrun. If any of these show up, Subaru’s workshop guidance is to replace the propeller shaft assembly rather than attempt to service the staked U‑joints. A driveline specialist may be able to rebuild the shaft with serviceable joints, but sticking with an OE‑style replacement is usually the most straightforward option. After replacement, aligning the shaft to its original phasing and respecting balance marks helps keep it smooth on the road.

Given Aussie and Kiwi conditions—coastal air, gravel and the odd beach run—an underbody rinse after salt exposure and periodic checks are smart. Catching wear early saves the rear diff, mounts and the wallet.

Popular questions

Does the 2018 Subaru Exiga use U‑joints or CV joints in the rear driveline?
It uses both. The rear half‑shafts are CV‑jointed, while the propeller shaft between the transmission and rear differential uses universal joints. On the 2018 Exiga, those U‑joints are sealed and not designed for greasing.

How often should the Exiga’s U‑joints be serviced?
They’re maintenance‑free, so there’s no greasing schedule. However, it’s wise to have them inspected every 12 months or 20,000 km during routine servicing, especially if the vehicle tows, sees gravel roads or coastal driving.

Can just the U‑joint be replaced, or does the whole prop shaft need changing?
Subaru’s service information treats the Exiga propeller shaft as a non‑serviceable assembly—if a U‑joint is worn, the recommended fix is to replace the entire shaft. Some driveline specialists can rebuild the shaft with serviceable joints, but the OE approach is a complete assembly swap for best fit and balance.