drift_raptor

Ok so i picked up my 12a last week and for the most part she runs really strong. the only major gripe is that once i hit about 45 mph it starts to vibrate and when i let off the gas it gets worse and when i accelerate it goes away..i think its my lsd which will be replaced soon enough but i wanted to pick some brains of more exp owners.

blwfly

iTrader: (4)

is this in like 4th gear?
have probaly the same thing lots of vibration evan goin 70 i feel the vibration im thinkin maybe tranny or engine mounts

or maybe exsaust myn rattles alot soon will fall off but i can feel that as well

81gsl12a

iTrader: (1)

it could be a bad wheel bearing.. i dont think it has anything to do with your lsd

Blake

The most likely cause of a speed-related vibration is a bad driveshaft, plus it's an easy thing to check and deal with if it proves the culprit. You might as well start there.

KeloidJonesJr.

iTrader: (8)

YOU'rE YOKES ARE GOING OUT! DANGER TO U-JOINTS!

drift_raptor

cool thanks guys ill check those asap and no it starts b4 4th gear

aussiesmg

iTrader: (1)

If its speed related and goes away as you get faster it could well be a wheel balance issue.

KeloidJonesJr.

iTrader: (8)

My friend had the same problem but it happened before 5th and hard to shift.

blwfly

iTrader: (4)

so whats involved with checking the drivesharft i dont have a clue

when i turn left,well hard left it makes a clunking noise kinda like a slow cv clunk and disapairs when goin straight i dont think iv heard it turnin right what could this be?

i get vibrations from 3-5gear
and at idel

seldawg

if it was a rear u-joint you would feel it through all gears during acceleration. If it was a front u-joint you would feel it during deceleration. That pretty much eliminates that as the cause since you said it goes away at times. I would agree that it could very well be a wheel balance issue or wheel bearing. The hard left turn clunk would have me concentrating on the left front tire. I recently had my left front wheel bearing nut work it self loose and that caused a slight vibration at higher speeds. Did your 7 sit for a while in the same spot before hitting the road?

jim

seldawg

vibrations at idle, check motor mounts.

dantheman

iTrader: (4)

I have a simular vibration issue. At EXACTLY 38 miles an hour I get this low level vibration that you hear more then feal. Super deep sound that almost hurts your ears. If you power through and make it to 40, it goes away.

I think I need to get tires rotated/balanced.

blwfly

iTrader: (4)

i get vibrations when deceleration too
can you give me a lil more info on the wheel bearing nut so i know where it is. behind the rotor? hard to replace?

what am i looking for when checking engine mounts i cant move the motor when its turned off its on there solid i cant shake the motor

seldawg

wheel bearing nut is behind the cap that you will see once your remove the tire if you still have stock rims. Jack the front tire up so there is no weight on it. If your wheel bearing is loose at all you will be able to feel play in your tire. Grab the tire and push / pull in and out.( best way I can describe it ). To get to the wheel bearing just remove the cap with a screwdriver and you will see a metal retainer with a cotter pin. If you need to tighten it remove the retainer and pin and tighten it down. NOT all the way though. get it snug and then back it up a smidge.