Hello,
I have a 98 RR. My check engine light is on. I took it to AutoZone to have the code read and it came up 0730 Incorrect Gear Ratio. Do you have any idea what could be the problem?

 

That code by itself really doesn't mean or indicate a problem. How is your truck driving? If down the road, it starts running bad, go have the code read again to see if the real issue is starting to show up.

 

Well I took my car to the dealership to get the check engine light looked at and they said my MAF sensor is not working. Can this be cleaned or do I need to replace it? Also where is the best place to buy RR parts online? I also believe I need a new wheel bearing, but I am having a hard time figure out which tire the sound is coming from. Any ideas on how to locate which tire maybe having the problems? Also I have a anitifreeze leak. It is leaking from two metal pipes that are located right behind the glove compartment area?Any ideas of what that could be? And one more thing, my air conditioner only blow air out on the driver side vents and blow hot air out the passenger side vents. Any information on any of the subjects would be highly appreicated! Thanks

 

On the 98's, you can try cleaning the MAF with a good quality contact cleaner spray from Radio shack, if it works, you are ahead, if not let me know, I know where they sell good guaranteed used ones.
Sounds like you may have some o-rings leaking at the heater core.
As for the blower, could be a bad control unit or a bad servo to one of the control doors up under the dash.