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  #1  
Old 02-25-2009, 09:48 PM
Dayton-Dave Dayton-Dave is offline
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what causes "tire scrubbing" on tight turns?

Especially when backing up the SVX shudders or scrubs...much like a locked up posi unit on a differential. It seems like it is the front tires making the noise, but there is no tire marks on the pavement.

Any ideas?

Dave
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Old 02-25-2009, 09:54 PM
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Re: what causes "tire scrubbing" on tight turns?

Are you turning sharply when it happens? If so it's likely the notorious solonoid C problem causing AWD bind.
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Old 02-25-2009, 10:01 PM
Dayton-Dave Dayton-Dave is offline
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Re: what causes "tire scrubbing" on tight turns?

I did a search and came up empty on "solonoid c" can you explain further or show me where to look?

Dave
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Old 02-26-2009, 07:01 AM
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Re: what causes "tire scrubbing" on tight turns?

If it is the AWD binding, take your car to an empty parking lot and begin doing a lot of figure 8s with the steering lock to lock. Increase the speed as much as reasonable to get some extra torque. After 15 min. of this any binding should be relieved, unless you have a bad solenoid or some other problem. AWD binding is common especially on cars which are not driven a lot.
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Old 02-26-2009, 07:03 AM
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Re: what causes "tire scrubbing" on tight turns?

Quote:
Originally Posted by Dayton-Dave View Post
I did a search and came up empty on "solenoid c" can you explain further or show me where to look?

Dave
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Old 02-26-2009, 11:34 AM
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Re: what causes "tire scrubbing" on tight turns?

Quote:
Originally Posted by Dayton-Dave View Post
I did a search and came up empty on "solonoid c" can you explain further or show me where to look?

Dave
I'm going to let the more experienced folks answer that for you. I know it's a possible cause, but I don't have the experience or knowledge to tell you how to fix it.

That solenoid is what controls the AWD transfer clutch, and when it gets cranky it applies either full or zero line pressure (not sure which) to the clutch , the end result of which is that your front and rear wheels are being forced to turn at the same speed. In tight turns where the wheels follow different radii through the curve, a couple are either dragged or forced to skip ahead.
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92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping
2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos
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