The transmission must be removed. Not a DIY job unless you are skilled.
does a 93 f150 have a 1piece rear main seal
how do you replace a Ford F150 rear axle seal
Yes but you must eather remove the transmittion or move it back enough to be able to work.
its to the rear of engine under the intake manifold
That engine has a solid round one piece rear main seal that slides over the rear of the crankshaft. You will either have to remove the engine are transmission to be able to replace the rear seal. No other way to do it. ( BIG JOB ) and a good paying job.
Remove the trasnsmission and you can then replace the seal.
Two
A Jeep 4.0L has a two piece rear main seal. You have to remove the oil pan and rear main bearing cap to replace it.
On top of the valve cover , near the rear of the cover
What type of rear end do you have?
You must remove the transmission are engine to replace the rear main seal.
The front tank is the main tank and the rear tank is the auxiliary tank.