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The BMW Range
3 Series
E46
E46 transmission problem
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<blockquote data-quote="jarance" data-source="post: 627836" data-attributes="member: 21"><p>There are no symptom when the Aux oil pump will failed. When it goes, all the ATF will gush out from the failed oil seal bushing.</p><p></p><p>The problem of the failure is cause by the failure of the Gearbox support mounting. When the rubber is harden or cracked,</p><p>it will cause the GB and engine and drive shaft to be misaligned. This misalignment will put undue stress on the shaft of the</p><p>the torque converter and bushing of the aux oil pump. The shaft of the TC will wear down and ATF will leak out. When the</p><p>bushing fail, the ATF pressure will force the ATF to spurt out of the GB. White smoke will come out from the ATF splashing</p><p>on the exhaust..</p><p></p><p>So change the GB mounting if you have not done so. it only will cost you a few hundred buck as compare to RM2K for the</p><p>replacement of the aux oil pump and TC. </p><p></p><p>Your GB problem could be due to sticky solenoid valves or the wrong type of ATF being used when you change the ATF oil.</p></blockquote><p></p>
[QUOTE="jarance, post: 627836, member: 21"] There are no symptom when the Aux oil pump will failed. When it goes, all the ATF will gush out from the failed oil seal bushing. The problem of the failure is cause by the failure of the Gearbox support mounting. When the rubber is harden or cracked, it will cause the GB and engine and drive shaft to be misaligned. This misalignment will put undue stress on the shaft of the the torque converter and bushing of the aux oil pump. The shaft of the TC will wear down and ATF will leak out. When the bushing fail, the ATF pressure will force the ATF to spurt out of the GB. White smoke will come out from the ATF splashing on the exhaust.. So change the GB mounting if you have not done so. it only will cost you a few hundred buck as compare to RM2K for the replacement of the aux oil pump and TC. Your GB problem could be due to sticky solenoid valves or the wrong type of ATF being used when you change the ATF oil. [/QUOTE]
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