88 GMC Vandura has a 700R4 transmission that wont stop leaking.


Old 10-05-12, 03:16 AM
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Join Date: Oct 2012
Location: usa
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88 GMC Vandura has a 700R4 transmission that wont stop leaking.

My van has a 700R4 transmission that won't stop leaking on the passenger side pan. The torque converter has recently been replaced. I also had 2 transmission filter and gasket set installed. I thought maybe the pan was bent, so I replaced it with a new one. The leak is still there. Should I drive the vehicle some distance so the gasket seals or is there another problem? It only drips on the passenger side.
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Old 10-05-12, 04:30 AM
the_tow_guy's Avatar
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Join Date: Feb 2001
Location: SW Fla USA
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I would be looking for another source. Cooler lines come to mind as I think they're on your pax side, they are on my 4L80E.
Old 10-05-12, 08:10 PM
iceman681's Avatar
Join Date: Jul 2012
Location: usa
Posts: 435
are you torqueing it properly, and try to avoid cork. and make sure the trans has a no nicks or gouges in that area. and like the_toe_guy said look higher
Old 10-09-12, 07:20 AM
Join Date: Feb 2012
Location: USA
Posts: 34
whenever I have a leak, I buy the glow in the dark fluid, add it to whatever is leaking, give it a week and use a black light to track it down. They have it at most autoparts stores

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