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Old 11-12-2006, 01:10 PM   #1
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Default losing transmission fluid

its not leaking cant find any leaks where is the modulator located white smoke come out the tailpipe after starting the car its a 91 bonneville se
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Old 11-12-2006, 04:25 PM   #2
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Sometimes white smoke out the tailpipe is actually steam from a blown head gasket.
The transmission'* vacuum modulator is on the front of the engine toward the driver'* side bolted to the transmission. It should have a vacuum line hooked to it. It is possible for the vacuum diaphragm to be perforated and transmission fluid to be sucked into the vacuum line.
Send a private message to opensourceguy, he plays with his a lot.
Also check for leaks where the transmission lines meet the radiator.
If you are losing fluid, it has to be going somewhere.
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Old 11-16-2006, 07:57 PM   #3
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yeah my modulator went back on the old motor... smoked like one helluva blown head gasket. Clear a field with that. It'* probably the modulator... to test, pull it off [one 13mm bolt on a small bracket]. Disconnect vacuum line, and push pintle in... does trans fluid come out the vacuum line? If it does, it'* blown. Go to the parts store, and get one for a 93 bonne... it'* adjustable. Tighten that thing up... it'll make your shifts super firm [longer life], or loosen it up for super smooth shifts. And it'll get rid of your smoke.
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