I just bought my first 4x4 truck and need to know how to id the vitial part numbers(ie. axle, transfer case).  Are there any hidden problems I should be on the look out for.  And last, it has a 6" lift with 35" tires.  Is there anyway to gear the rear end to bring the speedo back to true and if there is, do I do the front too?

I have a ton more questions but dont want to bore y'all.  Any advise would be a huge help.  

Thanks, James D.  

a haynes or chilton manuel is usualy the first place I start when trying to find out drivetrain specifics.

usualy there's a tag in the door jamb or in the glove box that will list secific options.

here's a site with a calculator to refigure your final drive ratio to get the speedo back in line,  if you do regear always do both axles!!
http://www.ringpinion.com/Calculators.aspx  

Thanks for the info!!!

Anymore info y'all might have for this truck (ie. problems to look for) it would help out as well.

Thank you!!!  

superlift offer a type of programmer, called TRU SPEED, that you can plug up in your truck, that will correct the speedo to different tire size, and gear combo's.