STi Drivetrain Rear Clunk
#1
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iTrader: (5)
Join Date: Apr 2006
Location: Kapolei
Posts: 824
Car Info: 1998 RS STi
STi Drivetrain Rear Clunk
I'm pretty sure I can rule out suspension since it doesn't do it on bumps.
The hubs axles and diff are from a JDM STi
Only does it in reverse when taking up the drivetrain slack, and when letting off the gas. (basically the same thing - whenever the rear end experiences torque in the opposite direction of normal rotation it clunks)
It's always been there to some extent even before all the AutoX and RallyX stuff I've been doing.
All the bushings are relatively new as I put all new ones in as part of the swapping process. The clunks is rather loud, Ryan and Ian have heard it. It sounds like its coming from the driver rear side.
I'm going to check for play in the wheel, maybe its a wheel bearing, but then again no unusual whirring noises associated with that.
Going to double check the torque on the axle nuts and maybe swap the axles around to see if the noise switches sides.
The only other thing I can think of is maybe there is some play in the axle CV joints? or the parking brake shoes are shifting around?
The hubs axles and diff are from a JDM STi
Only does it in reverse when taking up the drivetrain slack, and when letting off the gas. (basically the same thing - whenever the rear end experiences torque in the opposite direction of normal rotation it clunks)
It's always been there to some extent even before all the AutoX and RallyX stuff I've been doing.
All the bushings are relatively new as I put all new ones in as part of the swapping process. The clunks is rather loud, Ryan and Ian have heard it. It sounds like its coming from the driver rear side.
I'm going to check for play in the wheel, maybe its a wheel bearing, but then again no unusual whirring noises associated with that.
Going to double check the torque on the axle nuts and maybe swap the axles around to see if the noise switches sides.
The only other thing I can think of is maybe there is some play in the axle CV joints? or the parking brake shoes are shifting around?
#3
Registered User
Join Date: Oct 2005
Location: On da mountain.
Posts: 660
Car Info: STi (cornering, accelerating and braking hard).
Axle nuts. Get new ones and torque to spec. I had a click appear after a Solo event once. I thought it might be the diff and or associated bushings. Changed the rear driver's side axle nut and the noise went away.
#11
Registered User
Join Date: Oct 2005
Location: On da mountain.
Posts: 660
Car Info: STi (cornering, accelerating and braking hard).
Since it goes away each time he changes the axle nuts, then it's the axle nuts. Now to figure out why they keep losing their clamping force???
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