If you are swapping out an old 6-volt transmission for a 12-volt flywheel, you will need to make room for it by grinding down the transmission bell housing. This can be a very dangerous job. Please watch this video for proper procedures as well as safety precautions.
Air Powered Angle Grinder
Small Flat Head Screwdriver
The bell housing will be
ground down so that we can fit a later model 12 volt flywheel.
The transmission case is
made of magnesium and magnesium fires are nearly impossible to extinguish. Extreme
caution must be used. Make sure that there's no steel in the area being ground
as a spark could ignite the shavings.
Use a small, air powered
angle grinder to remove material from the four engine bolt bosses so that we
can mock up the new flywheel.
We use a flywheel
mounted to a crankshaft along with a clutch disc and a pressure plate to show
why the transmission must be ground. [We] use the assembly to indicate where
the transmission needs to be ground down. The flywheel is installed into the
transmission, onto the input shaft and spun a few times, then pulled out.
We can see where the
flywheel is touching and grind the areas down. The process is repeated until
the flywheel installs and spins without contacting the transmission.
Stay tuned and in the
mean-time, head on over to JBugs.com for all your vintage Volkswagen
transmission parts and accessories.