904 Tail Shaft Seal Selection?

904 Tail Shaft Seal Selection?

OK, here are the extension housing seals and sizes, that were used in 904's>>>1966-1972: 2.254" OD, no dust boot, >> 1973-on: 2.375" OD>>also 1973-on 2.445" OD

Hope this helps. Your local transmission shop probably has these in their stock. Just a suggestion.

Evan Dutch said
Hey guys,

I’ve got a 360 magnum and a 904 trans in my 1971 scamp. The tail shaft seal is leaking and I’m trying to source a replacement.

I’m seeing differing results and it appears there is more than one size seal.

How do I determine which seal is correct?

Thanks in advance

See my post. Always measure the OD of the seal. According to my parts catalog, boot seals (2.375 OD) used only on 1973-on, although most shops I dealt with used the non booted seal.