This is a replacement pinion seal.  This is a much better seal than the seals you find at your local parts store because usually they don't have the special dust shield lip.  These are really no different than a heavy duty seal other than they do not have an indexing lip for installation.  We usually coat the outside of these seals with a little RTV and then press them in.

Features:

-Special Lip for dust sealing- Just Like OEM.

There are sizes    29 Spline   and 27 Spline