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#21014 07/25/2003 6:00 AM | Joined: Apr 2001 Posts: 35 Wrench Fetcher | | Wrench Fetcher Joined: Apr 2001 Posts: 35 | I am stumped. The pan on my 350 auto tranny just wont quit leaking. I put the last gasket in when it was pretty cool in the garage, and now that heat has arrived, two quarts of fluid made its way onto the floor. I tightened up the pan bolts, which were snugged, but not cranked down as they are now. this worked for a week or so, then the old drippin thing started again. Whaddy think? | | |
#21015 07/25/2003 6:34 AM | Joined: Apr 2000 Posts: 179 Shop Shark | | Shop Shark Joined: Apr 2000 Posts: 179 | Possibly the pan's been over-torqued one to many times, dishing the bolt holes so the gasket won't compress between them. A few other things to look at are seals and gaskets on the dipstick, kickdown cable, modulator and shifter, or maybe cooler lines and fittings.
Joe McNeel
http://mcneelnet.com/~jmcneel/59.html
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#21016 07/25/2003 11:22 AM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | One other thing that can occur which is rare, is when the tranny case itself has a case with a poor casting (case porosity) where the fluid can leak right through the pores in the case.
Next time you take the pan off, put the edge of the pan over a block of wood with the tranny side of the flange facing up, use a ball-peen hammer and tap the holes flat or even out the other way. Do that to all the holes and lay the flange side down on a good flat surface to see if all the edges are fairly flat.
when you install the pan with a new gasket, tighten the bolts to 10 lb/ft or if you are good with the feel of a wrench, snug them up just enough to hold the pan tight against the tranny case.
Look at all the other areas the rest of the guys mentioned as well. You may want to take the thing to a car-wash and clean it real good. See where it is starting to leak when you get home.
Also check the front pump bolts. you will only be able to get to a few of them as the torque convertor will be in the way. If some are loose, others may be also.
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#21017 07/25/2003 4:46 PM | Joined: Jul 2000 Posts: 962 Shop Shark | | Shop Shark Joined: Jul 2000 Posts: 962 | I'm having the same problem with a T350 in my '67 Lemans. The darn thing will drip for days even when its not driven. And Ive changed the filter & gasket. I think mine is leaking from the aftermarket dipstick tube and the gimped-up tranny cooler lines.
Not to hijack the thread, but Ive got a few TH350 questions:
What is the trick for installing those u-bend it tranny cooler lines?
And how much wobble is too much wobble in my flexplate/ringear??? Is flexplate wobble a function of loose crankshaft bolts or loose TQ bolts???
How do I know if I have the tension on my Lokar kickdown cable right?
thanx
chip
Preaching the Hot Rod Gospel according to the 4-stroke apostles:
Suck, Squish, Fire and Fumes
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