9980-49 – Center Support Bearing – Subaru Application – 1.181″ ID – 1.750″ Center Bearing To Base

Q: How do the 9980-49 and 9980-50 differ if both have 1.750" height and 1.181" bore? A: Like several pairs in the 9980 Subaru series, the 9980-49 and 9980-50 share the same bore and height but differ in bracket geometry -- specifically the mounting slot position, bracket arm angle, or isolator configuration. Always confirm via the Subaru OEM part number from the removed assembly rather than ordering by dimension alone.

Q: My Subaru Legacy produces a vibration between 65--75 mph that disappears at other speeds. Is this the center support bearing? A: Speed-band vibrations that disappear outside that range are characteristic of driveshaft resonance, which can be caused by a worn center bearing with insufficient isolator damping. However, they can also be caused by tire imbalance, wheel bearing play, or driveshaft imbalance. Rule out tire balance first (it is the most common cause), then inspect the center bearing. If the center bearing rubber is hardened or cracked, replace the 9980-49.

Q: What is the inner ball bearing specification inside the 9980-49? A: A 30×55 mm (or similar) metric deep-groove ball bearing sealed with double lip seals. The exact ISO designation depends on the width and internal clearance class used by Subaru for this application.