Chevrolet Repair: TRANNY FLUIDS, bolt holes, auto transmission

Question
HI TOM .I HAVE THE MOTORHOME WITH A 454 CHEVY IT HAS A HYDROMATIC AUTO TRANSMISSION IN IT IT A 1985 MODEL YEAR.WHAT TYPE OF ATF SHOULD I USE THERE,ALSO WHEN YOU REMOUNT THE TRANNY PAN DO YOU USE JUST THE GASKET OR BOTH GASKET AND SILICONE STUFF.THANKS

Answer
I DAVE,USE DEXRON 3 OIL..IF THE GASKET IS RUBBER WITH METAL O-RINGS AROUND THE BOLT HOLES THIS IS REUSEABLE. THEY ARE GREAT..IF NOT, I WOULD USE THE GASKET THAT COMES WITH THE FILTER..ALSO DO NOT OVERTIGHTEN THE NEW GASKET.JUST SNUG IT UP EVEN. IF TO TIGHT, THIS WILL CAUSE IT TO PUSH OUT OF THE MOUNTING SURFACE CAUSING A LEAK..HOPE THIS HELPS YOU,,,TOM..