June 27, 20223 yr Hi folks, looking for best advice my forester has had a hard life and been off the road for over a year till yesterday when it passed its MOT. I have notice that on turning I am experiencing wheel wind up which I think is a sticky centre diff, possibly as it’s Sat so long. my question is 1 what is best oil to flush out the manual gearbox? And then refill it? 2 what is the centre diff unit like to change on the car and what sort of cost for a new one? 3 would I be able to put in a better gearbox and rear diff matching but keep rest of my drive train without wiring issues etc for the car any help would be great 👍
June 27, 20223 yr The centre diff is a viscous coupling sealed unit and flushing gearbox oil will make no difference to it . new units for a 6 speed be around the £400 mark, the 6 speed is slightly harder replacement than a 5 speed box . I would drive it around a bit and see if stays constant issue, do check all tyres are close match in wear and same model tyre, one of worst things you can do on these AWD viscous diff systems is run miss matched and off brand junky tyres ...
June 28, 20223 yr Author Hi, got any diagrams of the 2009- forester gearbox 6 speed? all new tyres so all exactly the same for rolling size issue cheers
June 14, 20241 yr 2009 Forester diesel 6sp manual. With reference to replacing the centre diff, have I been mis-informed by being told that to remove and replace the diff, it is a matter of removing heat shields, rear prop and a ring of 14mm bolts and the diff comes out. I have also read that the gearbox has to come out - which is right please.
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