Leaking Transmission

[Sac1234]

2014 GMC Sierra 25000 miles oil leaking from appears to be the rear seal on transmission. Has anyone else had this problem?

[Willshire]

Sounds like you ended up with either a dud seal or excessive play in the tailshaft of the trans.

[Sac1234]

Could be why I also have the famous vibrations at 70-80 mph. Well I told dealer to align front end and rotate tires also. If that dosent help. It's going back!