4l60e losing fluid.
#1
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Join Date: Aug 2005
Location: Dover Arkansas
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4l60e losing fluid.
What would cause a 4l60e to keep pumping fluid out the vent tube on top? My tranny has twice now pumped fluid out the vent to the point I don't have enough and it starts slipping while driving. I can put more back in in and it runs fine. It does this over a long period of time, like 6 months before it gets down low enough to start slipping. I know I should check it more often, but... Thanks for the help.
#2
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fuild out the vent is a sign of overheating what kind of cooler do you have .A bad converter can cause that also. additionally if it started this after a rebuild and is only small amounts someone may have used and early 700r4 pump gasket which will cause a continuous but small leak from vent at higher rpm.
one thing you can do that will help in either case is put a rubber hose on it and direct to a high place well above the trans it wont fix a spew from over heating but if its a case of wrong gasket or the tab on the gasket has just come off it will solve the slow leak problem
one thing you can do that will help in either case is put a rubber hose on it and direct to a high place well above the trans it wont fix a spew from over heating but if its a case of wrong gasket or the tab on the gasket has just come off it will solve the slow leak problem
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#3
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Thanks, This is a 96 S10 Blazer with 142,000 miles, no rebuild. It did this starting about a year ago. I've added fluid a couple times and it lasts about six months. No other signs of leaks anywhere else. Just the vent hose onto the exhaust. Makes for a smoky ride sometimes. Runs fine when fluid is topped off though.