You really need to remove the heavy GyroMatic transmission using a transmission jack so you don't end up with a damaged transmission or body!
A floor jack is a fools way to pull a heavy trans which is what is in your Dodge.
The video proves that🥴!
**Remove the lower bell housing cover first...then look up between the fluid drive coupling and the rear main cap to be sure your engine has six small bolts holding the rear main seal plates to the block....if so read the rest of this.
If there are no small bolts retaining the rear main seal plates your rear main seal is inside the engine under the rear main cap....the trans doesn't need to be removed to replace that style of seal....but the oil pan has to come off. Your original engine should have the external type seal though.
So....onward to the next step
**Before pulling out the trans...The FD clutch driven plate should have four equally spaced small wooden support wedges pushed in by hand between it and the Fluid Drive coupling to prevent the clutch driven plate from excess lateral movement.
This step protects the internal somewhat delicate bellows seal and graphite seal ring. Now after removing the trans wiring under the pass floor access cover you can pull the transmission straight out...slowly and carefully.
**Next remove the throw out bearing, clutch pressure plate and disc.
**Then the fluid drive coupling needs to be removed....eight nuts bolt it to the crankshaft...a long special wrench generally is used to remove the nuts.
Access is tight.
The fluid coupling is very heavy and awkward to pull off the crank. If you have never pulled one off you better be ready ....it's very heavy...don't drop it.
Now you have some access to the two piece rear main seal...that's another whole story..
Re-doing the rear main seal plates properly with the original asbestos rope would be difficult for a first timer .
The retainer plates have to be spread/opened up. New ropes installed and carefully rolled into the plates....the plates squeezed back semi tight on the rope seals ...assembled seal plates test fitted to the crank for sealing fit and feel.
Maybe two three four times...
Then trim the rope ends just right...
This is a technical job that a lot of care and knowledge is required to have 100% sucess.
The car needs to be on a lift or jacked up and supported safely.
Then the job is all done! Simple? Naw🥵
Give it a whirl...have some fun and learn!
Okay I threw my thoughts in..