# 2008 Subaru Tribeca vibrates at 35-55 mph **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** tribeca, subaru\ **Created:** [December 20, 2020, 12:22am UTC](https://community.cartalk.com/t/2008-subaru-tribeca-vibrates-at-35-55-mph/173455 "2020-12-20T00:22:16Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![PeterPetit](https://avatars.discourse-cdn.com/v4/letter/p/57b2e6/32.png) [@PeterPetit](https://community.cartalk.com/u/PeterPetit)\ **Post date:** [December 20, 2020, 12:22am UTC](https://community.cartalk.com/t/2008-subaru-tribeca-vibrates-at-35-55-mph/173455/1 "2020-12-20T00:22:16Z")
When accelerating between 35mph and 55mph experience a vibration. ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [December 20, 2020, 8:36pm UTC](https://community.cartalk.com/t/2008-subaru-tribeca-vibrates-at-35-55-mph/173455/2 "2020-12-20T20:36:26Z")
Sounds like an AWD issue. Pull out your wallet. ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [December 20, 2020, 9:16pm UTC](https://community.cartalk.com/t/2008-subaru-tribeca-vibrates-at-35-55-mph/173455/3 "2020-12-20T21:16:14Z")
To me, it sounds much more like a problem with the transmission’s torque converter lockup mechanism. If you haven’t changed the trans fluid at least 3 times over the past 12 years, that makes this all the more likely. However, while an AWD problem is less likely, if the vehicle has been run with mis-matched tires, and/or if the tires haven’t been _consistently_ rotated on schedule, then an AWD-related problem is a possibility. What can you tell us regarding both transmission servicing and tire matching/rotation?