Parts for your 2010 Subaru Impreza-Universal joints

2010 Subaru Impreza universal joints — what they do and when to service them

Universal joints are absolutely relevant on a 2010 Subaru Impreza equipped with Subaru’s Symmetrical All‑Wheel Drive. The factory service literature identifies a two‑piece propeller shaft (tailshaft) with front and rear cardan (universal) joints and a centre support bearing between the gearbox and rear differential. This layout is documented in the Subaru Factory Service Manual for 2010MY Impreza/WRX (Drive Shaft/Propeller Shaft section), mirrored in the Subaru genuine parts catalogue where the U‑joints are part of the propeller shaft assembly, and described similarly in the Haynes Subaru Impreza 2007–2011 manual. Note: the axle shafts use constant‑velocity (CV) joints, not U‑joints, and rare FWD variants without a rear propeller shaft won’t have these U‑joints.

On an AWD Impreza, the universal joints let the prop shaft transmit torque while the driveline moves with suspension travel and drivetrain angles. When they wear, they can introduce vibration, clunks, or shudder that feels like a wheel balance issue but shows up on throttle or during take‑off.

• Typical symptoms of tired U‑joints:
  • Shudder on take‑off or under load at 60–90 km/h
  • Clunk when shifting from reverse to drive or on throttle tip‑in
  • High‑frequency vibration that changes with speed, not engine rpm
  • Rusty powder at the bearing caps, or stiffness/notchiness when the shaft is flexed off the car
• Inspection and service tips:
  • No periodic greasing — OEM joints are sealed and staked. Include a visual and play check during underbody inspections (every 20,000 km or annually works well in Aus/NZ conditions).
  • Check the centre support bearing and prop‑shaft balance if chasing vibrations, tyre/wheel issues can mask driveline vibes.
  • If play or binding is found, Subaru supplies the propeller shaft as an assembly. A driveline specialist can often rebuild with serviceable circlip‑type U‑joints and then balance the shaft.
  • When removing/refitting, mark flange orientations, support the shaft to protect the centre bearing, and torque fasteners to spec per the Subaru FSM.

For most owners, U‑joints last a long time — often well past 150,000 km — but high loads, off‑seal driving, or water ingress can shorten their life. Keeping an ear out for new noises and a feel for any fresh vibration is the easiest way to catch issues early and keep that Impreza smooth on the open road.

Popular questions about 2010 Subaru Impreza universal joints

Do all 2010 Imprezas have universal joints?
Most AWD models do, on the propeller shaft between the transmission and rear differential. The front and rear axles use CV joints. FWD variants (where sold) don’t have a rear prop shaft, so they won’t have these U‑joints.

How long do the factory U‑joints last?
It varies with driving and environment, but many last 150,000–250,000 km or more. Regular inspections during servicing help spot early wear, especially if the car tows, sees corrugations, or has modified ride heights.

Can the U‑joints be greased or replaced individually?
OEM joints are sealed and staked, so they aren’t greasable and Subaru sells the complete prop shaft. A driveline specialist can usually rebuild the shaft with replaceable U‑joints and re‑balance it, which is a solid, cost‑effective option.