Seedy Al Posted December 6, 2011 Share Posted December 6, 2011 Hey guys, Quick question. I have a subaru legacy wagon here. 2.5 auto. Am finding when turning medium to tight corners it feels like it has a decent shudder from the rear end. I have checked the tyre sizes, and they are all the same size and profile, however all different brands. I chucked it on the hoist, looks like Brand new Diff oil in the rear diff, Defferlently LSD oil. Also chucked a use in the FWD hole in the engine bay to disengage the AWD, this seemed to make a decent bit of difference to how it drove. So I guess the question is, what is the chance of the Rear diff being rooted, verses say something like the center diff etc? Any help or experience on this would be wicked, as i havnt fucked round with these too much, but feel i have thought of the most ovious things (unless some how the different tyres are causing a problem....?) From Napier with Love Allan Quote Link to comment Share on other sites More sharing options...
JoKer Posted December 6, 2011 Share Posted December 6, 2011 center diff/bind more like/gearbox rebuild? my 2.5 Auto.. 1kF6tJJcmEs you may remember this car from Wagnats Quote Link to comment Share on other sites More sharing options...
keltik Posted December 6, 2011 Share Posted December 6, 2011 The center 'diff' clutch packs tend to weld themselves together after a while of binding up - if inserting the FWD fuse improves it - its most likely a gummed up solenoid or nakkered speed sensor in the transmission causing the problem. If your feeling brave - you can whip the tail housing off and give it all a clean up. If your not feeling brave - bang a new box in it - they are cheap. The autos of that vintage dont have a center differential but instead rely on a duty solenoid feeding pressure to a multi plate wet clutch to drive the rear wheels. Putting in the FWD fuse puts full power to the solenoid. The channels that drain fluid away from the clutch packs get full of crap so over time - you start getting torque bind. Quote Link to comment Share on other sites More sharing options...
shizzl Posted December 6, 2011 Share Posted December 6, 2011 trans flush may solve it. we did a shit heap of these at pkmc...trans flush and a diff flush our leggy is doing this also,but im in the cant be fucked mode so it can wait or die,its not bad yet Quote Link to comment Share on other sites More sharing options...
Unclejake Posted December 6, 2011 Share Posted December 6, 2011 I guess the fuse experience discounts something simple like mal-aligned toe? Quote Link to comment Share on other sites More sharing options...
MACKAZ Posted December 10, 2011 Share Posted December 10, 2011 Circumferences can also be different from brand to brand ie Supercat 185/55/15 IS bigger than Nankang 185/55/15. True story Have seen this cause similar issue with Baleno 4wd wagon... Quote Link to comment Share on other sites More sharing options...
KKtrips Posted December 10, 2011 Share Posted December 10, 2011 I remember this being a common fault on these things - something to do with a solenoid on the centre diff - I think I replaced one once before and it was a piece of cake. It was such a common occurance IIRC that there should be something on the net about this. Quote Link to comment Share on other sites More sharing options...
phtmbl Posted December 10, 2011 Share Posted December 10, 2011 mine did the same and we put a treatment fluid into the trans and it went away, give it a go before you do anything else drastic. Quote Link to comment Share on other sites More sharing options...
keltik Posted December 10, 2011 Share Posted December 10, 2011 Yeah first cause of failure is the solenoid not working or gummed up. Second failure if thats allowed to continue is the clutch packs weld together. Its known on the web as 'torque bind'. The UltimateSubaruMessageBoard is mostly made up of these threads. Quote Link to comment Share on other sites More sharing options...
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