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Everything posted by Setright
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Rear pad wear: A 2003 model is likely to have EBD. Electronic Brakeforce Distribution will make the rear brakes work harder in a straight line and ease off them in bends. "Accelerated" wear is a common complaint. At work, my boss' Toyota needed new rear pads before fronts - at 30k miles!! Shudder: The most likely cause is rotors. If the pad deposits are still very thin then hard braking can "mask" the shudder. You'll need to be very persuasive to get the dealer to fit new rotors and pads. Perhaps they can meet you half-way if you supply the pads? That way you can better pads than those stock "Jurid" pads.
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Well, having also tried a number of oils and having a passion for Castrol "Syntorq" for a long time, I have recently been introduced to Valvoline Synpower 75W-90 It cured a 2nd to 3rd grind that Castrol couldn't improve on. A local Danish rally driver suggested this oil, he uses it his race cars and the gearboxes last 120k miles. Evidence enough for me :-)
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Radial tyres have a very stiff metal mesh underneath the tread. This is very reluctant to change shape or size. That's why it keeps a good grip on the road, it won't deform and lose contact patch like a cross-ply does. The radial bit is actually referring to the direction of the weave/mesh that makes up the sidewalls. This is rather flexible, allowing the tyre to offer ride comfort. More air will straighten these walls out and usually give less ride comfort because the flex is reduced. The stiff mesh around the perimeter doesn't alter shape or length because of that. Sure, a tyre pumped to 45psi may stretch in perimeter compared to a non-inflated tyre, but the difference is minimal. With respect to tyre-pressure sensor systems: They haven't done too well yet. Porsche did it right with the true pressure sensors on the 959 - the rims had hollow spokes to allow the sensor to live in the center and not cause balance problems!
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Try it again with both right wheels on snow and the lefts on clean tarmac. The right wheels will spin most of the power away. More pronounced on the front if the rear LSD is working. It's not a question of "true 4wd", it's about balance between traction from wheel to wheel. All four wheels have drive going to them, it's a question of whether they can put it to use.