Fluid leak from above top cooler line 4l60e 98 Tahoe 4x4? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 08-25-2012, 08:27 PM
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Fluid leak from above top cooler line 4l60e 98 Tahoe 4x4?

This leak is coming from either the top cooler line where it connects to the tranny or above that. I really can't see anything above that point and I've replaced the top fitting, including o-ring ect. What else is above this fitting that could be leaking?
It's a 98 Chevy Tahoe 4x4, 4l60e, ect.
I guess I'll take the cross member out tomorrow and drop the tranny down in order to try to see more. I was hoping someone has seen this issue and can guide me to a solution.
As always, thanks for any help!!!
Mike

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Old 08-25-2012, 10:49 PM
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well there is nothing above it,, un less your your trans is cracked around the fiting or the line it,s self has a small hole in it,, other than that the onley thing up there is the vent if that,s the case your trans is building up to much pressure on the inside,,
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Old 08-27-2012, 01:28 AM
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Your right. The case is cracked just to the rear of where the top fitting threads into the case. I cleaned it good with brake cleaning fluid then coated everything around that fitting with baby powder. As soon as I cranked it I crawled under with a telescopic mirror tool and identified the exact location. Then I cleaned it again and put 2 coats of JB Weld over the cracked area. It's holding good for now but I don't expect it to last. If not I guess I'll have to pull the tranny and transfer case and TIG weld the crack. There is not enough room to get a TIG torch and rod to it with it in the truck.
Thanks for your help s10mikey.
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