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#1
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Just what is Duty Solenoid C?
Ive been reading about people having binding issues, and that seems to be the fix. My car gives a little clunk when I go into reverse, and also shakes a little when turning at a slow speed. Does this sound like my car is binding? I dont know what it means... If so, how much is the new solenoid? And just how hard is it to replace? What happens if I dont replace it? Though I have driven a few SVX's, and they all seem to do the clunk thing into reverse...
-Dennis
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D.J. McPhee 2006 Infra-Red Ford Focus ZX3 ~ 67k No longer SVX'n, Ill always miss them! 1995 Polo Green LS-i ~ 95k 1992 Dark Teal LS-L ~ 145k (04/91) #2231 1992 Claret LS-L ~196K (05/91) #0831 |
#2
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Re: Just what is Duty Solenoid C?
D J,
FSM states "Duty Solenoid C (Transfer) is mounted to the transfer control valve on the side of the extension case (far rear of transmission), and its duty ratio is controlled by the signal sent by the TCU. It then controls the transfer control valve for controlling the transfer clutch hydraulic oil pressure." It appears to basically control the amount of torque transferred to the rear wheels under various traction conditions. "When DS3 becomes inoperative it turns OFF. This causes maximum oil pressure to be applied to the transfer clutch so that power is always transmitted to the rear axles. (Direct-coupling AWD)." If you have ever driven a 4WD vehicle on dry pavement with the rear wheels pushing as the front wheels attempt to turn left or right, they cause a good deal of "judder" and wear on the front tires as they attempt to rotate while simultaneously being pushed forward, creating an "eraser" effect. A correctly performing AWD system incorporates a viscuous coupling or clutches that allow front and rear wheels to turn at different rates, preventing this "binding". Hope that makes some sense. As far as accessibility, this is a fairly major job to undertake replacement, as in 3 full pages of instructions and diagrams in the manual. Subaruparts.com prices Duty Sol-C out at about $80. Glenn
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"The only thing necessary for the triumph of evil is for good men to do nothing" Aaron Burke 1993 25th Anniversary Edition #63 of 301. R.I.P. Rojo 7/24/2008 She saved my life! 1997 Ebony Mica Pearl LSI. BLACKBERRY 1998 5-Spd Legacy GT Wagon in Glacier White: NUBURU 2005 Cadillac STS in Sandstorm Metallic: STORMY Veteran and farthest traveler of 1st SoCal2MuseumsMeet2010. http://www.subaru-svx.net/photos/user.php?RojoRocket |
#3
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Re: Just what is Duty Solenoid C?
I have the same "clunk" when I put mine into reverse but that's because my rear diff. bushings are shot badly. Check yours that maybe the problem.
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Seth 94' Barcelona Red w/ Tricoat black 2-tone AWD Ls -Sold Mods:AWD conversion/4.44 swap by Budfreak, Custom red interior lights, Custom Satin black dash, Power mode switch, Cold air intake, Permecool tranny filter,Sony xplode 10" sub, Sony xplode 1000w amp, Blitz in-line driver, DDM Tuning 6000k HID's, New paint job/body work by me, 97' Grill, QC shift kit, 17'' MB Motoring rims, 15&20 min mod, front & rear urethane swaybar bushings, Custom fiberglass sub box, Custom red led a/c control unit, perrin lightweight crank pulley, Black wrinkle finish powdercoated intake manifold w/ clear hoses , 02' outback heated/power black leather seats Soon to come:Fiberglass hood, upholster ALL suede to black leather Past subies: 92' Pearl White/black top LS-L-SOLD 96' Legacy Outback-TOTALED 99' Legacy Outback Limited 30th anniversary edition-TOTALED 98' Forester L -Totaled Other toys: 99' Forester S -WRX brake upgrade, soon an 04 wrx motor swap 06' B9 Tribeca-Stock 1982' Yamaha xj650 Maxim Mods: work in progress |
#4
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It has been recommended in the past to replace the entire solenoid assembly if the C has quit, as it is likely the others could be on their way out soon enough. It is a fairly major job.
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"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute. |
#5
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Re: Just what is Duty Solenoid C?
Quote:
Glenn
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"The only thing necessary for the triumph of evil is for good men to do nothing" Aaron Burke 1993 25th Anniversary Edition #63 of 301. R.I.P. Rojo 7/24/2008 She saved my life! 1997 Ebony Mica Pearl LSI. BLACKBERRY 1998 5-Spd Legacy GT Wagon in Glacier White: NUBURU 2005 Cadillac STS in Sandstorm Metallic: STORMY Veteran and farthest traveler of 1st SoCal2MuseumsMeet2010. http://www.subaru-svx.net/photos/user.php?RojoRocket |
#6
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Re: Just what is Duty Solenoid C?
Put your FWD fuse in and see if your car still shudders around corners, if it does, the problem is not the duty solenoid.
The clutch packs wear grooves into the transfer drum, and then the clutches will hang up and cause shuddering/binding, the master tech at my work told me to go to an empty parking lot and do several tight circles in each direction and it will usually loosen them up.
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1992 SVX LS-L #1222 Pearl White 1987 GL Turbo wagon, 5 lug conversion, D/R 5 speed (Rice killer) 1992 Dodge Ram 4x4 diesel (car hauler) 1968 Dodge Polara convertible (Camaro killer) 1990 Toyota Corolla FWD auto (330,000 mile grocery getter) 1986 VW Jetta |
#7
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Re: Just what is Duty Solenoid C?
The parking lot circles, would it be done with or without the FWD fuse in?
Paulo |
#8
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Re: Just what is Duty Solenoid C?
Quote:
Have you checked out if your German model has the same trans as the USA type? Does putting in the fuse give you 2WD? How's it going, all right?
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Black Betty [Bam a Lam!] '93 UK spec, still languishing Betty Jersey Girl Silver '92 UK [Channel Isles] 40K Jersey Girl @ Mersea Candy Purple Honda Blackbird Plum Dangerous White X2 RVR Mitsubishi 1800GDI. Vantastic 40,000 miles Jersey Girl |
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