I believe the + you are refering to is the universal joint. That is a replaceable part. Using a hammer, tap the broken parts from both the drive shaft and the pinion. For directions to replace it, go to our home page under the DIY section. It isn't hard to do. However, if the pinion seal is leaking, thta requires more work. You need to remove the pinion shaft which requires the differential to be taken apart. Note, it is common for them to seep a little as they get older. If it isn't a bad leak and the differential fluid is still full, I wouldn't too concerned about it.
Let me know if you have other questions.
Thursday, October 6th, 2011 AT 4:45 AM