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Old 06-04-2010, 05:24 AM   #1
Scooby Specialist
Member#: 19681
Join Date: Jun 2002
Chapter/Region: RMIC
Location: Denver, CO
1998 Legacy Wagon GT

Default Driveshaft/carrier bearing worn out? (car bounces)

'98 Legacy 2.5GT, that I've owned since 2003. It now has 200,000 miles on it. Maybe 50k miles ago at most, the car got Group N engine and trans mounts. Maybe 10k miles ago, it got the rear diff bushings replaced.

The car has a horrible bounce, that I can only assume is driveline slop. I've read several threads on here about it, and I believe my problem must be in the rear driveshaft. No amount of driving is going to change the way the car acts. If I'm going 30mph in 3rd gear, and start to go down a slight hill, the car will bounce so bad that I have to push in the clutch and disengage the transmission to make it stop. I've tried to accelerate out of this, and it does, but only after it increases the frequency of the bouncing first(while slowly decreasing the intensity). This problem has slowly gotten worse over the years/miles. When I did the Group N stuff, it decreased quite a lot. But has returned.

Am I on the right track here? A brand new driveshaft is $700 though. It would seem that another used driveshaft would likely result in the same, if it is a wear issue.

And before anyone brings up the "change your driving/feather the throttle more" idea, you are plenty welcome to come here to Denver and drive my car. You won't be able to make it drive smooth.
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