Automatic Transmission Seals

I need to replace my seals in my tranny and am a little confused on which type to buy. The seals that are bad are where the axles go into the tranny. I am leaking fluid bad. Just on the passenger side. Every where I checked it has two options for seals. One is a regular seal the the other is a kwik sleeve seal. I looked in the Helms manual and it doesnt give a part number.