Transmission Issue?

[Shaun. Meng]

Hello all,

I've got an 04 legacy wagon with 171,xxx miles on it. The issue I'm having is when I let off of my accelerator in any gear, my car shakes back and forth. Gears 1-3 are the worst, but it is still evident in gears 4 and 5. I'm not really sure where to start looking to find out what the issue is. I think it could be the transmission/engine mounts, or maybe even the clutch, but I'm not entirely sure. Also, every once and a while, If the car is partial shaking, when I try accelerating in a lower gear the car shakes more violently.

[RumbleRumble]

most likely trans mount or rear diff bushings.

Here are insert for the rear diff bushings. Cheaper than replacing them with good results https://whitelineperformance.com/subaru-rear-differential-mount-in-cradle-insert-bushing-kdt927

 

Suggested 5 speed trans mount

https://www.amazon.com/Subaru-D1010FE020-Transmission-Mount/dp/B00I7967OO

 

if that doesn't work it's probably the drive shaft carrier bearing

 

the shaking is when your at a too low of a rpm in gear(lugging the engine). don't accelerate unless your over 1.6k rpms if you can down shift.

[Shaun. Meng]

The shaking isn't from engine bog, its more of the car shifting forward and then back a few times seemingly on/from the transmission. It almost seems like the transmission is loose from the engine, although I know it isn't. It's very hard to describe, and everywhere I look my issue doesn't seem to come up.

I will look at that bearing, It could be something in that area. And I think I will replace the mount as well, being as I'm not sure if it has been replaced anytime recently. Hopefully it will help.