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Old 04-07-2010, 10:32 PM
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Re: Water in 4L60E automatic transmission do i need to rebuild transmission

Usually a tell tale sign of tranny damage as a result of water, either coolant or actual water getting in somehow, is a rusty dipstick. (A good thing to keep in mind when looking at buying a used vehicle, is to check the dipstick). The trouble with water of any kind in there, is that water, compared to tranny oil, has a low boiling point. It evaporates when the tranny gets hot and starts attacking the glue that holds the clutch material on the steel plates. Over time, the glue breakes down, clutches start slipping and your left with a tranny that needs a rebuild.
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