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E46: Gearbox Life
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<blockquote data-quote="musclehedz" data-source="post: 123393" data-attributes="member: 1033"><p>Also maybe some of you will notice that the manual specs say 8litres of ATF but when you flush or do a drop and top..you won't reach 8 litres, probably 6litres or so(it can be variable). This is because some of the ATF is in the torque converter. So it would be beneficial to do 2 changes during the drop and top. Step 1 drop and top and go drive around with the car make sures all the gears get shifted, drive slow drive fast. Once done drop and top it again as the final one. So this way can approximate that most of the old fluid is drained. If you keep at this method, probably you won't even need flushing to be done in the future if a constant mileage to change the ATF and good ATF is use. But to be on the safe side you can do the flushing else you can't see thru the gearbox to see if there are sludges unless you're superman...</p></blockquote><p></p>
[QUOTE="musclehedz, post: 123393, member: 1033"] Also maybe some of you will notice that the manual specs say 8litres of ATF but when you flush or do a drop and top..you won't reach 8 litres, probably 6litres or so(it can be variable). This is because some of the ATF is in the torque converter. So it would be beneficial to do 2 changes during the drop and top. Step 1 drop and top and go drive around with the car make sures all the gears get shifted, drive slow drive fast. Once done drop and top it again as the final one. So this way can approximate that most of the old fluid is drained. If you keep at this method, probably you won't even need flushing to be done in the future if a constant mileage to change the ATF and good ATF is use. But to be on the safe side you can do the flushing else you can't see thru the gearbox to see if there are sludges unless you're superman... [/QUOTE]
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