How hard is to replace the tail shaft oil seal ibn 833 4-speed transmission?
TOM RR

Easy. remove the driveshaft, remove the old, (larger flat blade Screwdriver and a hammer) collapse one side of the seal an d remove. Clean the area, use a thin coat of the sealer of your choice on the OUTSIDE of the seal ONLY and a light film on the recess of the housing. tap the seal in. lube the yoke lightly install driveshaft and wipe up any excess sealer lube.
NOTE: If somewhat inexperienced, It is a good idea to buy two seals. Doing so will improve the chances of the first one going in straight and easy. You can return the extra, have a spare or save a for the second seal

relatively easy.
remove driveshaft. use sturdy THIN tipped straight screwdriver to tap edge of seal around the lip and transmission tail shaft housing until the seal parts enough to use a standard tip screwdriver to finish tapping the seal out.
clean seal mating surface inside tail shaft housing.
then use the CORRECT seal driver, or make one from PVC pipe parts that fits the seal lip entirely, then tap in new seal.
you may, or may not, want to coat the outside diameter of the seal with your sealer of choice.
however, you MUST use a nice coating of wheel bearing grease on, and into the garter spring showing on the back side of the seal.
this will prevent the spring from falling out of it's retainer groove when it is being installed.
lightly lube up driveshaft yolk on the outside, and reinstall. done.
hope this helps in some way.
perhaps others may chime in with more tips.

Also, it's a good idea to pack the garter spring with heavy grease to prevent it from popping off while hammering the seal in.

got treed again !

Here is what can happen if the garter spring becomes disloged.

Good advice so far.

I will add this. There are two types of seals. I like the balloon seal but often flat seal is all you can get. Both work fine but I like the balloon to keep the dust/dirt away from the sealing surface.

Most balloon seals have small drain hole I put to the bottom so water won't build up in the seal.

Since the transmission shaft sticks out of the middle of the seal I use this ultra high tech seal installer. I know it looks like a galvanized pipe cap but the one I sell is only $12,000.00 and can be used underwater if he need exists.

Seriously the pipe cap works great on most seals and fits like a glove around the balloon.

those caps do indeed work for installing the seal.
however, i like to grind/sand the internal threads out to prevent the chance of cutting the seals rubber boot.
the threads tend to be sharp, especially if using an imported [pick the country of your choice ] item from your local hardware store.
this is just a heads up.

3/4 inch socket of the right size work well also, if you have them

Can you put me on the list for when your next boat comes in ? 🤣🤣

i can't swim, so no boat ride for me..........
i'll stay on shore and guard the beer.

😲🤣🤣🤣