Did you degrease all threaded bolt holes then coat them with Aviation Sealer. Then degrease all bolts and threads then coat them with aviation sealer.
Then at pan assembly brush on more aviation sealer at the holes. Then install the bolts and evenly snug them down.
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My friend's older RV with a 460/C6 automatic, the tranny pan was leaking badly. Enough to lose 2 quarts of fluid over time, making a mess of the floor where parked.
Decreased the pan and gasket perimeter with brake parts cleaner, blow dry with compressed air. A few times.
Mind you this is being done with the full load of trans fluid in the pan yet.
Now took out one bolt at a time, degreased with brake parts fluid, mopped it all up with aviation sealer, and reinstall the bolt. Then on to the next bolt one at a time.
All bolts back in and sealed, holes sealed, treads sealed. No more leaks what so ever.
Had clean red fluid in it so it saved the mess of full pan removal, and the cost of new fluid.
So as stated in the RV World, he is now a Happy Camper, no more leaks.
He can now park it in his driveway without making a mess of it.
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