Just got done installing shifter cables on my 98 SVT, and I just want to warn anyone who is considering this replacement to beware!!!! It took me 8 hours and I used to be a mechanic! Although it can be done without removing the transmission, I had to remove the center console, pull up the carpet, remove the shifter box and finally cut the old cables to get them out. Although it can be done successfully, I wouldn't recommend it to the faint of heart.
My symptoms were only getting 3rd and 4th gear, plus a really sloppy shifter. The cables are only about $65.