| You need to use only the (preferably new) o-ring style gasket against a really clean mating surface; which will provide a positive compression seal. You cannot tighten a Mag-Hytec pan enough for the OEM style gasket to seal properly. If you use both gaskets the o-ring cannot work the way it was designed.
Maybe you have over-torqued the cap screws and have either distorted or bent the transmission pan. The torque spec for those cap screws is only 17-20 inch pounds (not foot pounds). If you honk down on them the pan will either leak or crack. You must use the washers that were supplied with the pan (or their equivalent) as well.
I found that if I use four long studs with nuts in the corner holes as locator pins that I can get the pan on/off in about 15 minutes by myself without even having to jack the truck up. Run the studs into any four corner holes finger tight, slip the pan over the studs, spin on the nuts a few threads, and let the pan hang. Then slide the pan up the studs and hold it up with one hand while you get one or two of the cap screws started. Just reverse the procedure to drop the pan (with no splash).
__________________ 2008 GMC 3500 Crew Cab Long Bed 6x6 - Stock
AMSOIL Everything (except Antifreeze)
Reese "Tow Beast" Class V Receiver
Rhino Bed Liner (Not recomended)
AMSOIL Remote Bypass with Precharger and FilterMag
PCV Reroute
Mag-Hytec Differential Cover and Deep Transmisson Pan
14.8 Calculated Average MPG (No Load) |