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#1
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Shaking
I'm having a problem that i'm not quite sure about:
Upon deceleration and close to the stopping point my car shakes very badly, but not quite as badly as during acceleration, which is very bad. All is normal after about 10MPH. Sound seems to be coming from under center console...hate to think of transmission problems since it was rebuilt 30,000 miles ago and has problem free since, but could this be related to a 1st gear problem in some way. any ideas? Thanks Caleb |
#2
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Check the easy stuff first
Before jumping to the transmission conclusion, have you checked the simpler and more obvious (and cheaper) possibilities?? Such as cross-member mounts, or engine mounts, which after 10-15 years could be in poor shape. How about looking at the brake rotors for warping, which can seem worse the slower you get when coming to a stop, causing things to vibrate.
Beyond that, something in the driveline may be starting to bind a bit, check your fluids to make sure everything is well lubricated, tranny, front and rear differentials, etc. Good luck, let us know what it turns out to be. |
#3
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Not rotors, just replaced, does seem like some sort of binding somewhere....
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#4
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Have a look at the driveshaft. It can cause low speed vibration issues.
__________________
Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#5
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"Have a look at the driveshaft. It can cause low speed vibration issues."
Complicated? What to look for? |
#6
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Quote:
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-Mike ECUTune2v7 - 4.11 5 Speed - Sprung 6 Puck Clutch - D&S Rotors - SS Brake & Clutch Lines - HKS Panel Filter - HeaderBack Exhaust -80GB Hard Drive - GroupN Engine Mounts - - some other "tricks"
[SIGPIC][/SIGPIC] In progess: track down mystery noise <-identified, paint the new dash, get better pic Spring plans: Replace Trans - Integrate ECU with the carputer - Suspension - Go back to STI Filter - Paint? Maybe not - Next Oil change: Purolator L30165 Member #995 | My Locker | My New Locker Catch you next at: ? Auto-X ? |
#7
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engine mounts or transmission mounts? Pretty easy and cheap to fix?
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#8
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To inspect the driveshaft, its necessary to remove the center section of the exhaust. As long as the bolts aren't too rusty, it comes apart very easy. Be sure to have a new donut gasket handy for reconnecting it to the secondary cat.
After the center section of the exhaust is removed, you can start with a visual inspection of the driveshaft. You might be able to determine problem without removing it, but I think you'll want to remove it to get a good understanding of whether the driveshaft is causing the problem.
__________________
Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#9
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Why would mounts or the driveshaft only cause the vibration at low speeds, but then go away completly?
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#10
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Is it very bad to drive the car under these current conditions, and isn't replacing the mounts as straightforward as it seems? How can I be sure it is either the mounts or the driveshaft itself?
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#11
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The thing about inspecting used Subaru driveshafts is that it can be hard to tell if they have a problem. When I first got my car, it had a pretty bad high speed shake. I pulled the driveshaft, and there was nothing obviously wrong with it. Replaced it with another used driveshaft in similar condition, and the shake was gone.
__________________
Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads. |
#12
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I have an appointment at the shop on monday, but need to drive about 50 miles between now and then, almost all highway, so I hope nothing goes south.
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