Description: 31 Spline Transmission Output Shaft Oil Seal
Model: Mustang, Shelby, Cougar, Ford
Engine: 427, 428 CJ, 428 SCJ, 429 CJ, 429 SCJ, BOSS 429
Transmission Type: 4-speed transmission
Outer Diameter (inch): 2.506
Shaft Diameter (inch): 1.687
Die Stamped on back of seal: VICTOR 49720
Factory: San Jose, Dearborn, Metuchen
Accuracy Rating: 10
Best Repro Available: YES
This simple but unique seal has always been hard to source for high level restorations until now. Most people have never seen what an original looks like since it was typical to replace the seal early in the cars life. For all our past restorations we've had to find a good seals on a used transmission (see pictures of restored original production seals below).
The seal has a rubber inner seal and outer felt dust shield just like the originals came with. The manufacture name and part ID code on the back was copied from originals supplied by Ed Meyer. Last picture shows an original seal in a very low mile survivor.
INSTALL TIPS: Install with the felt seal out. This seal really seals tightly around the slip yoke so make sure to apply oil to the seal and slip yoke barrel before installing the driveshaft.