You may want to make sure it is a rear trans seal, this would involve removing the t-case to get to. If it is a rear output seal on the t-case then that may be a cheap estimate to do, or is it the o-ring for the speedo sender on the t-case. No really if it is the rear tranny seal then you would have to remove the t-case. Usually if this seal leaks then you would also want to change the tranny output suppoert bearing at the same time(as this may be the root casue of the leak. So only the o-ring for the speedo is a 15 minute job. later robbie