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09-04-2020, 04:26 PM | #1 |
Scooby Newbie
Member#: 422928
Join Date: Jun 2015
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Tranny vs. Driveshaft vs. Axle vs. Diff Vibration?
2002 WRX 5 speed - 265,000 miles Sudden vibration under load; reduction in vibration over 80mph. Worse when in gear under load but present when in neutral and cruising. Axles vs. rear diff vs. transmission vs. driveshaft? Took video posted above. I see oil leaking from driveshaft entry into tranny. Tranny oil prob has never been changed but fluid level OK. Is the play in driveshaft normal? Is clicking from tranny normal? Any recommendations? Thanks!
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09-06-2020, 08:56 PM | #2 |
Scooby Newbie
Member#: 510470
Join Date: Jan 2020
Location: SW Virginia
Vehicle:2002 WRX Mica Blue |
Check for movement of the engine under load
If engine&transmission tilt under load due to worn (abused in my case) motor mounts, that can change the pinion angle and stress the seal. Used to happen to my ‘80’s EA82 4wd wagons. With the output shaft of the transmission at a different angle to the driveshaft than the driveshaft to the rear end, it puts the driveshaft out of balance and can cause some hilariously sketchy vibrations when given the beans.
So prop the hood and watch the engine as you try the clutch in first & reverse with the parking brake on. If it moves too much you have some mounts to replace. And DO replace them: I say hilariously sketchy because I survived it, but a broken u-joint at speed ranges from code brown to a very, very bad day. |
09-08-2020, 06:50 AM | #3 |
Big Ron
Super Moderator Member#: 18062
Join Date: Apr 2002
Chapter/Region:
MAIC
Location: I can save you a ton of cash
Vehicle:on car parts so PM me b4 j00 buy |
If this is your daily, I'd say swap it. Get that rear trans seal and a new driveshaft. I've swapped mine just for peace of mine at about the same mileage as you. Check your local yellow pages...I got my new driveshaft from a local company who makes them and there is likely a local source in your area too as there are a few in my area. Seems odd to have several local manufacturers but apparently driveshaft making is a thing. Mine was $250 but I have a buddy working there.
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09-08-2020, 04:54 PM | #4 | |
Scooby Newbie
Member#: 422928
Join Date: Jun 2015
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Quote:
Hahaha code brown . Thanks for your input! The motor mounts are actually fairly new. I put new stiffer ones in when I pulled my engine to get it stroked to 2.1L! |
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09-08-2020, 04:56 PM | #5 | |
Scooby Newbie
Member#: 422928
Join Date: Jun 2015
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Quote:
Awesome! Thanks, Unabomber. Appreciate the input. This isn’t my daily, just a project car that had been otherwise pretty reliable. I was leaning toward the driveshaft so I’ll shop around. I’m in Philadelphia so I think we should have a decent number of shops around. FWIW, ended up picking up a 2020 Civic and 42 mpg feels pretty good. Miss the acceleration in my WRX, though. Will report back with what happens. Thanks again! |
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