Springer i bought a 2005 500 auto my first quad (same as you researched them all) had it for 1-year (700 miles)and it was stolen..Insurance company gave me a check for full purchase price minus 400.00 depreciation which tells you AC's hold their value. I could have taken that check and bought any quad i wanted but I bought the 2006 500 auto Ive now had this quad for 7 months and never had one problem with either machine.

 

hey mark, have a 400 05 tbx and would like to do same. is it just internal parts and control or different housing?

 

Just internal parts.. If you have some Auto skills you can do this.. The most inportaint thing is getting the correct back lash when installing the new gears. If i can help in any way let me know.. I might beable to get the parts cheeper for you... Let me know what your cost is and i'll let you know my cost. I'll get the part numbers for you if you need me to.

MArk